Slashdot Mirror


Droid Touchscreen Less Accurate Than iPhone's

gyrogeerloose writes "A test published by MOTO labs comparing the accuracy and sensitivity of smartphone touchscreens among various makers gave the iPhone top marks ahead of HTC's Droid Eris, the Google-branded Nexus One and the Motorola Droid. The test was conducted within a drawing program using a finger to trace straight diagonal lines across the screens and then comparing the results. While it's not likely that a smart phone user is going to draw a lot of lines, the test does give some indication of which phones are most likely to properly respond to clicking on a link in a Web browser."

41 of 198 comments (clear)

  1. Obviously... by Anonymous Coward · · Score: 5, Funny

    This is not the droid you're looking for.

    1. Re:Obviously... by DJRumpy · · Score: 4, Informative

      It reflects resolution, and shows 'dead spots' in the touch surface that the OS/Software must 'guess' as to approximate location. Granted it's not a very scientific test, but it does show some interesting weaknesses in the varous implementations. For instance, on an iPhone, you can click on a link that is only a few pixels in height and be relatively sure you'll get the correct link out of a list of links.

      If you'll think back to the days of low resolution, when you were trying to fit a decent image into a 16x16 icon representation, you get an idea of what this may be showing. If the touch capacitance screen doesn't have a grid address for a specific spot you're trying to touch, it will have to guess between the two nearest points.

      This is very similar to mouse resolution.

      A more valid test would be to use a 'robotic' finger that could apply exact pressure across all phones, but it does give a decent general idea as to how they stack up.

    2. Re:Obviously... by Sebilrazen · · Score: 4, Informative

      ...The Droid is not as good as the iPhone if you are buying it to use as a graphics tablet, but c'mon, who does that?...

      This guy. (Left 15 images... one of them was actually a New Yorker cover.)

      --
      "There are no facts, only interpretations." --Friedrich Nietzsche.
    3. Re:Obviously... by peragrin · · Score: 4, Informative

      Then you haven't used the iPhone. I click on single character links regularlly. Normally page numbers or the next arrow for images. It is another ui design by apple. It goes to the closet link within so many pixels.

      The droid I got to play with one day had hard enough time registering the unlock slide let alone clicking on page numbers. I will say however it displayed ars techincas mobile sitebetter than my iPhone. The droid didn't fix the damn font height but left it scalable. Along with not having to jailbreak to install myown apps are two big pluses. But at the end of the day the UI is more important than any other app. Good apps can't fix a bad ui. However a decent UI can make limited apps more usable.

      --
      i thought once I was found, but it was only a dream.
    4. Re:Obviously... by jc42 · · Score: 3, Interesting

      Actually this is more of a problem on sites that don't offer a mobile version.

      It can be a problem even for the people building the "mobile" versions of web sites. The iPhone is a special problem, since its default browser likes to format pages for an arbitrary size, then shrink it to (sometimes) fit the screen. The result can easily be text and buttons that are only a few pixels tall. When you "unpinch" to enlarge it, it doesn't get reformatted to fit the screen; it grows to larger than screen size and requires left-right scrolling to read.

      I've built a number of "mobile" pages that carfully avoid ever declaring a size for anything, with the idea that this gives the browser total freedom to format it to fit the screen. This works fine on most smartphones, but with the iPhone, it tends to produce font/button sizes that are either huge or tiny, and requiring 2-dimensional scrolling back and forth to read it all. There's a lot of discussion of this in various online forums, but no good solution that I've found. The best is to use a "meta name=viewport" tag to specify the screen width, but this only works for one of the two layouts, and the sending code can't know which layout the phone is using at the moment. Also, it'll break as soon as Apple releases an iPhone with a higher-res screen that's a different width. The basic problem is an old one: The server-side code can't correctly format things for a client's window, because there's no way it can know its size. HTTP could have included a field specifying the client's screen/window size, but that wasn't done. (If it's possible, I've never seen it, and I've seen a lot of HTTP and HTML headers.)

      Of course, even better would be for web clients to sensibly reformat for the screen space it has available. (There's even evidence that the folks who designed HTML thought about this. ;-) Many phones' browsers do this, but iPhone's browser doesn't even seem to try. If there's a way to override its default and say "format this for your screen's width", nobody seems to know the magic incantation to make it work.

      Funny thing is that my G1 phone reformats automatically when I rotate or resize the screen. So do the couple of other rotatable phones that I've tested. You'd think Apple's devs would know how to do this, too. I wonder why they got it so wrong?

      (One theory floating around is that it's intentional, to discourage the use of the iPhone's browser, and encourage people to write iPhone-only apps to do what could be done with a few web pages. I've seen no real evidence for or against this theory.)

      --
      Those who do study history are doomed to stand helplessly by while everyone else repeats it.
  2. Used "a program" ? by Anonymous Coward · · Score: 4, Interesting

    Was the program written to the same quality in all platforms? Or did they just slap together one quickly to get some juicy headline out? A more worthwhile test would be to go to the same websites in the same stock browsers and log the number of error clicks. Blah.

    1. Re:Used "a program" ? by Anonymous Coward · · Score: 5, Insightful

      "These aren't the results I wanted to see, therefore the methodology is flawed!"

    2. Re:Used "a program" ? by icegreentea · · Score: 3, Insightful

      It doesn't matter if a finger isn't "precise" enough. The purpose of the testing is to determine real life performance. So you should be testing with something as precise as you would use in real life. What does it matter if a phone can detect the exact position of a pen point, when it goes nuts trying to find the center of your fingertip. What matters is consistency. In that case, the methodology is wrong. A single human isn't not consistent enough, even over the number of repetitions shown.

  3. Re:What generation of Iphone is being compared her by potscott · · Score: 3, Insightful

    It is when the new products are positioned to be direct competitors of the third gen product.

    --
    I'm a firm believer in the philosophy of a ruling class, especially since I rule.
  4. Re:What generation of Iphone is being compared her by sznupi · · Score: 4, Insightful

    It's perfectly fair if that "3rd generation" product came out half a year before "disadvantaged" contenders.

    BTW, why only big touchscreen devices? There were supposed to be, y'know, cheap ones with Android by now.

    --
    One that hath name thou can not otter
  5. As a G1 user... by foodnugget · · Score: 4, Interesting

    I have to admit that I am somewhat underwhelmed. I got the G1 shortly after it came out a year and a half or so ago, and the touchscreen definitely falls short of what it could be. It is FAR less responsive than the iphone's, and the accuracy could indeed be better. I was coming from a winmo 5 device, so i'm still incredibly happy with it, relatively speaking.

    So the big question is whether or not all the manufs of android devices are using the same screen/screen chips, or if android has a fundamental problem interpreting data off the screen?

  6. Re:Well of course drawing lines is important by Anonymous Coward · · Score: 5, Funny

    I own an iPhone, and I can draw complex images with my finger, scrult a 3D sculpture with a particular program I have, and accurately type and click. I have nothing to compare it to but i know how accurate the iPhone is.

    Your message didn't happen to be typed on said iPhone, did it?

  7. So, restricted to capacitive screens by Eunuchswear · · Score: 3, Informative
    --
    Watch this Heartland Institute video
    1. Re:So, restricted to capacitive screens by sznupi · · Score: 3, Informative
      --
      One that hath name thou can not otter
    2. Re:So, restricted to capacitive screens by Eunuchswear · · Score: 4, Insightful

      The point is resistive screens do "accuracy", capacitive screens do "responsive" and "multi touch".

      They're testing screens for accuracy and they only look at machines with capacitative screens.

      The iPhone has multi-touch, it beats the pants of the N900 for "responsiveness", but it's nowhere near as accurate.

      --
      Watch this Heartland Institute video
  8. What's important by electricbern · · Score: 5, Interesting

    Although drawling lines might be important to some, what really matters to most smartphone users is how the phone responds to misclicks. Is it able to detect it and adjust accordingly? There is more to it then the accuracy of the screen. You are using your phone while standing or walking so even if the screen is 100% accurate you probably won't be. What kind of correction algorithm the phone has to compensate for that?
    Of course creating a considerate test is too much trouble and just saying that the iPhone touchscreen is more accurate then Google's scores you plenty of apple-love.

    --
    alias possession='chmod 666 satan && ls /dev > il && tail daemon.log'
    1. Re:What's important by calderra · · Score: 4, Insightful

      Precisely. Maybe the Nexus One is vastly superior at tracing circles. Neither of these results would say anything whatsoever about how the phone actually performs in click detection.

  9. Their conclusion is illogical. by onion2k · · Score: 3, Insightful

    It doesn't follow that a lack of accuracy from dragging in a painting app would affect click accuracy in a browser at all. For example, the accuracy could degrade the longer you hold your finger to the screen due to moisture building up on your fingertip or due to reduced capacitance as the blood flow is restricted.

    If you want to test point accuracy then write an app to test that; don't test something completely different and then leap to a potentially inaccurate conclusion.

    1. Re:Their conclusion is illogical. by dkleinsc · · Score: 3, Informative

      Their conclusion is perfectly logical: they have Yahoo Research listed as one of their "collaborators", and are apparently selling a system of their own which is Android-based but (in their opinion) better than the standard Android.

      --
      I am officially gone from /. Long live http://www.soylentnews.com/
  10. Re:What generation of Iphone is being compared her by icegreentea · · Score: 4, Informative

    They are testing a first generation iPhone. This test is interesting, but not really useful. As some of the comments point out, diagonal lines really aren't the best indicator for accuracy when hitting links or whatever. As usual, the lack of consistency that comes from using a single human being comes into play. While you don't need a machine that always draws perfectly straight lines, you need a machine (or guide) that draws the same lines for each phone.

    Some extra detail from the story. The iPhone has poor detection along the edges (basically flattens out diagonals into vertical or horizontal lines), the Nexus One has the best. Not that important as most UI elements aren't right at the edge anyways. The waviness in some of the tests suggests that the sensors or algorithms may be biased into vertical/horizontal motions (makes sense from a gesturing point of view).

    If they really wanted to test how well the touchscreen reacts to hitting links and stuff, I don't see why they just don't go test that. Load up the same sites and keep track of how well it reacts to you hitting links. At the very least, if they wanted to do the drawing program test, it would make more sense to test what happens when you try to hit points, instead of drawing lines. So you could put some magic marker dots on the screen, and have the user hit them and look for the overlap or something.

    All in all... shows off some interesting stuff. Suggests some interesting things about the behavior of the different touchscreens, but really not all too conclusive, and really points to further testing/refinement of procedure.

  11. Re:What generation of Iphone is being compared her by Anonymous Coward · · Score: 3, Insightful

    Is it fair to compare the third generation of a product to new products out there right away ?

    Fairess isn't an issue. Consumers are presented with various options today. They need to compare them today. We don't have to be worried about hurting the poor phones' (or manufacturers') feelings with the unfairness of it all.

  12. Not sure why this is supposed to be a problem by assantisz · · Score: 5, Informative

    I have a Droid and I just tried drawing diagonals in a paint program on the phone. Yes, I did get the waviness. All that means, though, is that the Droid is not a good choice for a phone if you want to draw on it. I am still able to use the on-screen keyboard just fine and even in a web browser I never have problems tapping a link no matter how far I am zoomed out. This is definitely not a deal-breaker for me. That said, the only reason why I have a Droid is because of the physical keyboard and a pretty decent free ssh client. The kids draw on it but they couldn't care less how straight the lines are or not.

    1. Re:Not sure why this is supposed to be a problem by assantisz · · Score: 4, Informative

      Do you happen to have any links illustrating the ssh client you mentioned? Sounds interesting.

      Sure thing: http://code.google.com/p/connectbot/

  13. Non-Issue by LinuxAndLube · · Score: 4, Funny

    This is obviously a non-issue. Just wiggle your finger a bit to draw straight lines.

  14. Re:So what? by Enry · · Score: 4, Informative

    As a Droid user, I think I can answer this.

    In order to unlock the screen, you can use a gesture to unlock it. About 75% of the time, it works fine but the remainder of the time the gesture is not recorded correctly. There's a few games (word search) that often have issues marking an entire word.

    Only owning an iPod Touch, it's hard for me to do a side-by-side comparison since I don't do the same things with the droid as I do the touch. All that aside, I love the Droid.

  15. Resolution? by phobos512 · · Score: 5, Interesting

    What effect does the fact that the iPhone has a vastly lower resolution screen play in this accuracy "test"? Seems it would make it easier to be more accurate.

    1. Re:Resolution? by Anonymous Coward · · Score: 4, Informative

      No effect. First, the touchscreen resolution differs from the display resolution. Second, these tests are showing results at the image level, from a distance away. We're not talking about, say, the Droid displaying wiggles on the order of 1-2 pixels. The wiggles subsume a large number of pixels. Further, even though the iPhone has a lower-resolution screen, it makes excellent use of antialiasing. You can observe position changes that, on average, are less than the pixel pitch with such methods.

  16. Re:Well of course drawing lines is important by Anonymous Coward · · Score: 3, Informative

    nah cause an iPhone would auto correct that, i tried it on mine.. So, to summarise, fail.

  17. Ah, groupthink by schmidt349 · · Score: 4, Insightful

    If you spent five minutes looking at this outfit's methodology you'd realize that the test is sound, though perhaps a little exacting compared to real-world use cases. But what I love is that the first twenty posts or so basically all offered apologies for the Android phones and denigrated the significance of the test. They couldn't be better PR responses if Google and Motorola had drafted them. If you happen to use and like an Android device, why don't you just admit that it has a flaw and deal with it? God knows it probably isn't going to affect you under most usual circumstances.

    I can't tell you for how long I was and still am pissed off about various missing features on the iPhone (auto-SMS, copy/paste, etc.) but I still like the device overall and use it. You don't have to hold this borderline view of the world in which computing devices are either God's work on Earth or Satan's playthings.

    1. Re:Ah, groupthink by jo_ham · · Score: 4, Insightful

      I was thinking the exact same thing, and if the results had been reversed and the Droid had been on top, we'd have had a flurry of posts talking about how the iPhone is an overpriced and inferior option.

      I also have issues with my iPhone (lack of built in MMS initially, lack of cut and paste until recently, annoyance that you still can't sync up your ToDo items from iCal with the built in calendar app and have to rely on third party apps, annoyance that you have to manually disable wifi if are trying to use 3G in an area with a hotspot, where it will try to use that wifi, even if you don't have a password for it, or its one of those web login ones).

      What's wrong with saying "the droid's touch sensitivity is less effective than I'd like"? It seems like droid users are just as zealous about their phones as they accuse iPhone users of being.

    2. Re:Ah, groupthink by 0xdeadbeef · · Score: 4, Interesting

      If you spent five minutes looking at this outfit's methodology you'd realize that the test is sound

      I spent less than five minutes watching the video and I realized I had been wasting my time, because this "test" is an absolute joke. He isn't balancing his finger against a straight edge, he isn't moving it at a constant rate, and the results in the video don't correspond to the images on the web site.

      Before I watched the video, I thought it had some legitimacy, as I got wavy lines when I drew on my Nexus One. But then I tried it with my finger against a pen laid diagonally across the screen, and it produced a perfect straight line, at every speed. The whole article is a fanboy blowing smoke, relying on the twitchy human nervous system.

      I think Martin Sheen said it best:

      Willard: They told me that you had gone totally insane, and that your methods were unsound.
      Kurtz: Are my methods unsound?
      Willard: I don't see any method at all, sir.

  18. Re:Well of course drawing lines is important by MBGMorden · · Score: 4, Interesting

    This is my biggest problem with my phone (a Moto Krave ZN4). I already had an iPod Touch, so figured "Hey, this touch screen thing is pretty cool. - I'll get one for my phone.". Didn't work out so great. While I can type away just fine on the iPod (I've started leaving my laptop home most of the time now since if I'm near a hotspot my iPod Touch does 98% of what I want to do on a laptop), on the Krave trying to do a text message on the onscreen QWERTY keyboard is just painful. Try to press one key - it registers the one beside it. Try to hit backspace. It registers a letter instead. Finally backspace across the two bad letters. Ok, now CAREFULLY try to press the letter I want. Nope, grabs the key beside it again. Not to mention the contacts list. I've just gotten used to apologizing to people because half the time when I tap a contact to call it calls the person next to them. This was particularly embarrassing when I was trying to call my brother at 4am over Christmas break because he overslept to go duck hunting - it the phone dialed one of the department directors at work which happens to be right next time him. After that I started prefixing all work contacts with #'s just so they'd stay away from my personal contacts on the list.

    I'm not buying another touch screen phone now without testing it in person first to make sure it feels right.

    PS Yes, I know the obvious answer would be to just get an iPhone but AT&T nor any other GSM carrier gets signal where I live.

    --
    "People who think they know everything are very annoying to those of us who do."-Mark Twain
  19. Re:Mechanical versus human testing... by silent_artichoke · · Score: 3, Interesting

    A "hot dog", huh? Sure...

  20. Droid Eris User by Odin_Tiger · · Score: 4, Interesting

    I have a Droid Eris, and as a guy with bigger hands that usually has trouble with these kinds of devices, I have to say I'm very happy with the accuracy - I almost never make a mis-click, even typing quite fast on the touchscreen keyboard.
    However, I'm disappointed in responsiveness. The interface reminds me of playing an online game on a shitty internet connection when your roommate is loading a new YouTube video ever few minutes - without warning, for no apparent reason, and rarely in doing the same action twice, a click / tap will take up to 2 or 3 seconds to register. It's accurate, sure, but that's meaningless when I can't tell whether the thing is froze up or it just didn't detect my click, and don't dare click again for fear of accidentally clicking whatever happens to be in that same spot on the next page if the first click did register.

    --
    Unpleasantries.
  21. Welcome to the world of the API by SuperKendall · · Score: 4, Insightful

    Was the program written to the same quality in all platforms?

    It's a DRAWING PROGRAM.

    As in, they take in whatever pixel input the system gives them and spit them out on the screen. "Quality" does not enter into it, because they are all using the same API's that just have the OS feed them a stream of points.

    It's representative of the quality of touch accuracy you will have in other apps because they, too, will just look at what points the OS is presenting the user as having touched.

    --
    "There is more worth loving than we have strength to love." - Brian Jay Stanley
  22. Re:What would be intersesting to know... by dzfoo · · Score: 3, Insightful

    That would be very true if touchscreens were purely a point-and-click (or aim-and-stab) input control. However, what Apple has tried to do with the iPhone (and the recent "Magic Mouse" is indicative of this trend) is to create a new human-device interface mechanism that depends more on natural and intuitive gestures than aiming and stabbing a specific screen area. Because of this, the ability to track finger movements consistently and accurately is very important.

    If, on the other hand, your user interface depends on a literal translation of a desktop point-and-click GUI, designed to be used primarily with a mouse and keyboard, to a touchscreen input control; then, of course, consistent and accurate tracking is less important than detecting the precise region where pressure was applied at a specific time. But if that is the case, the problems are deeper than just accuracy.

            -dZ.

    --
    Carol vs. Ghost
    ...Can you save Christmas?
  23. Couldn't repeat by limaxray · · Score: 4, Interesting

    First off, I have both a Droid and a 32GB iPod Touch. Frankly, I like the touch on the Droid better than the iPod - I find it more responsive and more accurate when playing the same game or browsing the web on both devices. It may just be my perception, but I simply find myself becoming less aggravated with the Droid's touch screen than the iPod's.

    While I don't have the iPod with me right now, I do have my Droid and was able to try this experiment. I used an app called 'Simply Draw' and was not able to repeat their results. Every time I try, I get lines that are as straight as my finger can make them. I have yet to produce lines like those in the article no matter how hard I try - even using multi-touch to draw 2 lines at once works perfectly.

    One problem I have noticed with the Droid that may be the cause here is the touchscreen is very sensitive to noisy power supplies. Using a cheap wall charger has a HUGE impact on the accuracy of the touch screen. I'm guessing Motorola didn't use any ferrites on the USB signals, allowing high frequency noise from an external supply to negatively impact the device. I suspect placing a ferrite on the USB cable near the phone end would minimize this issue, but have yet to try it myself. Instead, I just use quality chargers.

  24. Re:So what? by _Sprocket_ · · Score: 3, Insightful

    As a Droid user, I think I can answer this.

    In order to unlock the screen, you can use a gesture to unlock it. About 75% of the time, it works fine but the remainder of the time the gesture is not recorded correctly. There's a few games (word search) that often have issues marking an entire word.

    Only owning an iPod Touch, it's hard for me to do a side-by-side comparison since I don't do the same things with the droid as I do the touch. All that aside, I love the Droid.

    I'm also a Droid user. I rarely have issues with the lock screen. The impression I've had is those times that I do, it's because I was trying to do some one-handed thumb swipe or slashing at the screen. I'll have to pay closer attention but I would have a hard time at this point thinking that this test has much practical application to my experience. Of course, I also do not use an iPhone or other Android phone so I have nothing to compare to.

    I do, however, miss the curved unlock widget. I prefer it over the newer, current linear one.

  25. The test is biased by Anonymous Coward · · Score: 4, Informative

    [disclamer: i'm working in touch-screen business but not for apple/cellphone company]

    This test is biased as:
    - user perfomed, we use robot for this kind of qualification (but you can still get an overview if you use jigs)
    - strait lines are not the best to see if some king of trajectory filtering is done by the OS: use curve lines, or corners (to see over/undershoot)
    - to check if the border effect will affect the point perfomance, touch the screen at regularly spaced points (use a transparent plastic with dots printed on it)
    - it would be interesting to get the raw data sent from the touch sensor to check sampling rate & multi touch tracking (and thus removing, the OS and software filtering)

    That said, when you are in front of a new touch sensor, the strait lines test on the border is a 'universal' benchmark performed by everyone in the field...

     

  26. Re:Well.. by Belial6 · · Score: 3, Insightful

    The Android keyboard was marginal. The HTC keyboard was better.

    And yet, they are both infinitly better than the iPhone's keyboard.

    Sorry, I am feeling snarky this morning...

  27. Same. I used to be one of the people that posted by aussersterne · · Score: 3, Interesting

    here saying I'd never use a touchscreen. Too inaccurate. I poo-poo'ed the iPhone when it was released and swore up and down I'd never leave Palm. Then, at an AT&T store I tried out an iPhone on a lark and I was blown away. I had an upgrade so I went to the iPhone immediately. I've had a chance to test a couple friends' Android phones since, and there's just no comparison.

    The iPhone interface is absolutely transparent; it feels like "real world" physics is at work, not like you're using a user interface. The same suspension of disbelief can't happen on Android because the UI just gets it wrong or lags behind you motions way too often.

    --
    STOP . AMERICA . NOW