Navigon Vs TomTom: GPS Lag?

Discussion in 'iOS Apps' started by Vinny1967, Sep 11, 2009.

  1. Vinny1967 macrumors member

    Jul 22, 2009
    I currently have the TomTom app installed and for the most part it's great.
    However, I am finding it increasingly difficult to live with the GPS lag issue: I am constantly shown around 30 to 100 feet behind my actual position.
    This is bearable (just) on straight roads, however on roundabouts it's impossible to deal with.
    I assume that because TomTom are going to release the cradle with the extra GPS chip in, that they have no intention of trying to address this issue within the app.
    I have tried contacting TomTom about forthcoming plans, but they remain as tight-lipped as ever.

    Does Navigon suffer with the same issue?
  2. knoxtown macrumors 6502

    Nov 19, 2007
    I know this doesn't help much, but I rode with someone for a few minutes who has Navigon. It seemed to be right on point. I don't know where you are located(if that even really matters), but we were in the middle of LA.
  3. Ringu macrumors member

    Mar 20, 2005

    Regarding Navigon, I agree it seems to be right on point. My girlfriend commented the other day that the timing of the turn directions was "spooky & uncanny".

    Happy Navigon user at the moment.
  4. Vinny1967 thread starter macrumors member

    Jul 22, 2009
    Sorry - bit confused.
    Are you saying that the screen icon is 'on point', or the spoken directions (turn right), or both?
    The TomTom spoken directions seem to be OK, it's just the screen icon is way behind
  5. Pika macrumors 68000


    Oct 5, 2008
    It feels like there is a ghost inside my car telling me what to do spot on.
  6. Ntombi macrumors 68040


    Jul 1, 2008
    Bostonian exiled in SoCal
    I have Navigon, and both the screen and the voice are on point. And when I go "off route," it reroutes within a couple of seconds. I'm very happy with it.
  7. zeeflyboy macrumors regular

    Apr 25, 2009
    same, i don't know how they have done it but the navigon is spot on - i have noticed lag on google maps
  8. Julien macrumors G4


    Jun 30, 2007
    All moving GPS units (not just the iPhone) suffer from some lag since it takes time to decode and process the signal. Navigon seems to always have you at the spot you are though. I believe that Navigon predicts ahead so it can stay more in sync.
  9. Ntombi macrumors 68040


    Jul 1, 2008
    Bostonian exiled in SoCal
    That's true, but my stand alone Magellan is a bit slower the the Navigon app. OTOH, the Magellan is closer to my real actual location than my mother's stand alone TomTom, so I'm guessing TomTom's code is just altogether slower, i.e. less predictive.
  10. Vinny1967 thread starter macrumors member

    Jul 22, 2009
    Thanks for your replies.
    Now all I need is to get a refund for TomTom.
  11. Vandam500 macrumors 68000


    Sep 29, 2008
    I have both TomTom and Navigon. The TomTom is extremely laggy compared to Navigon, the difference is night and day, honestly. With the Text to Speech and iPod Controls on Navigon, it makes it SOOOO much better. Seriously, if you can ditch TomTom and get Navigon.
  12. converge macrumors member

    Aug 4, 2009
    My first experience was using the iGo which also had a noticeable lag. Then I tried the Navigon, and surprisingly, there is no lag whatsoever. The GPS arrow is spot on! Although I suspect they are compensating for the iPhone's GPS lag with some sort of predictive programming. Works for me.
  13. prominence macrumors regular

    Jan 31, 2008
    I use Navigon daily and it is always on point. I think the others are right, it HAS to have predictive code written into it or something, because it is always SPOT ON for me, and knowing the GPS chip in the iPhone is probably a POS, Navigon anticipated this and wrote for it in their script. I notice every time I am right at a turn it is at 0 feet, every time. And it locks on pretty quickly too, only a few rare times does it take 15-20 seconds to re-lock (my daily trip to work includes go through a tunnel for 5 seconds and it always looses signal; some days it will regain in less than 5 seconds, some days it takes 5-15 seconds.)
  14. FearlessFreep macrumors 6502a

    Jul 15, 2008
    Northern Virginia, USA
    It's been acknowledged that Navigon did do just that - compensate for the iPhone's GPS lag in reporting the coordinates by moving the marker slightly ahead of the actual reported position. The lag is said by developers to be sometimes as much as 2-3 seconds and is an iPhone thing and not specific to software. This strategy does have its flaws, too though if you stray from the 'predicted' route it takes longer to correct.
    In my experience, the lag even when uncompensated for is not significant enough to create anything more than a nuisance on being aware that there is a lag.
  15. joudbren macrumors regular

    Apr 13, 2007
    Edmonton, Alberta, Canada
    My Navigon is spot on as well with my 3GS. I'm actually used to GPS lag as I just switched from an HTC Touch Diamond running Garmin Mobile XT and the Diamond (and Touch Pro) are well known to have pretty awful lag. I was pleasantly surprised at how well the Navigon software is working and the TTS upgrade in 1.2 is the proverbial icing on the cake. VERY pleased with the Navigon purchase so far (other than I can't put in my own POI's.... grumble, grumble..) Cheers!

  16. zenoran macrumors regular

    Aug 19, 2009
    tomtom jumps all over the place.... navigon is pretty on point...

    I think navigon probably has some calibration to account for the gps being a little laggy on the iphone... tomtom is probably relying on you getting frustrated and buying their dock with gps chip in it when it comes out so they they left it laggy and pathetic.
  17. iGary Guest


    May 26, 2004
    Randy's House
    I'm hoping the car mount kit solves this issue. It also bothers me.
  18. vertigo235 macrumors 6502

    Jun 6, 2009
    I think you are right on here, they want to sell car kits, so why would they bother to make it work without it.
  19. Motorheadbanger macrumors member

    Aug 26, 2009
    Instead of spending a hundred dollars to get an already hundred dollar app to work properly why not just buy Navigon? :D
  20. Vinny1967 thread starter macrumors member

    Jul 22, 2009
    Bought Navigon last week and am now waiting for Apple to consider my refund request for TomTom.
    Saw the announcement today about the next Navigon update including live traffic, and this really is the icing on the cake. TomTom is trailing way behind Navigon. Don't see how they can ever catch up now.

    Found this amusing TomTom review on an iPhone 3G:

    Same guy, next day, iPhone 3GS:

    This is the kind of results I was getting with it, although the lag with me was only about half as bad.
  21. Ntombi macrumors 68040


    Jul 1, 2008
    Bostonian exiled in SoCal
    Those two videos are funny. :)

    How's Navigon working for you? I love it, and I can't wait for the traffic add-on.
  22. Vinny1967 thread starter macrumors member

    Jul 22, 2009
    It's in a different league to TomTom and iGo My Way.
    TTS, lane assistant, reality view, and absolutely no GPS lag - all make the process of navigating a pleasure.
    As I said before I really don't see how TomTom can catch up now without a MAJOR update, and previous experience says that will not happen.
  23. sfditty macrumors regular

    Nov 21, 2008
    I have the Navigon and TomTom apps. Navigon is clearly superior to TomTom. The lag with TomTom can be very disorienting while you're driving. I wish street names were more readable in Navigon though.
  24. rotlex macrumors 6502a

    May 1, 2003
    I returned Tomtom a week or so ago, refund from Apple, and purchased Navigon. Having used both, I can say I am much more pleased with the performance of Navigon. I have an older 3G and I experience pretty much zero lag for routing me around. Going off course, recalculation occurs in seconds. I am very, very happy at this point with my decision to "switch".

    Also, and I'm sure this can vary, the POI database, as well as roads in general, appear MUCH more up to date with Navigon for me. The Tomtom unit wasn't even aware of a Walmart a mile away from me that has been there for years now. I have yet to find something, I'm sure it's out there, that Navigon is not aware of in my area.

    Big thumbs up from me for pretty much everything at this point.

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