500 - 1,000 downloads

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GTR measures acceleration times for 0-60 mph, quarter mile, 0-100 km/h and 0-400 m, acts as a speedometer and records top speed. The navigation feature guides you back to your car or hotel. GTR also shows basic GPS data.

GTR uses sensor fusion of your phone’s GPS and accelerometer for high accuracy results. It detects acceleration start and end automatically and stores results to files. Just start GTR and go!

GTR has three views, PERF, GOTO and DATA:
- PERF shows current speed, top speed and acceleration times.
- GOTO shows direction and distance to a destination.
- DATA shows GPS compass, heading, latitude, longitude, altitude and location accuracy.

- Selectable mph or km/h
- Adjustable acceleration start and end speed
- Adjustable acceleration distance
- Selectable visible and/or audible alarm when speed and distance are reached
- Result file for each acceleration run
- Summary file for best results of session
- Summary view for best results of session and result files
- Result files can be sent via email or text messages
- Result files can be filtered
- Current location can be set as a destination with a single keypress
- Destination coordinates can be edited
- Three selectable GPS coordinate formats
- Supports up to 8 destinations
- Prevents display turning off
- Adjustable colors to suit lighting conditions
- Selectable scanning mode shows each view in turn
- Online user manual

For legal and safety reasons, do not use GTR for performance measurements on streets, roads or highways.

If you like GTR, please rate it! If you have suggestions or problems, please contact us at

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Recently changed in this version

Fixed problem with using GTR at high altitudes.

Fixed problem with using start speed higher than 50 km/h.

Fixed problems with non-zero start speed.
Improved visual notification of acceleration end.
Added summary of best performance results for session and result files.
Added result file list filtering according to file type and speed/distance limits.

Fixed ending of acceleration measurement when changing gear.

Comments and ratings for GTR
  • (67 stars)

    by Anatoli Dutsov on 09/12/2013

    Today i ran 12sec with 270hp car 1500kg ... few times i had 13.3 13.2 bit the reality is 13.7-8 ... and when i sow 12.1 i decided to write review ... please i dont want my money back i even want to pay more just make it more reliable ... now it shows rand

  • (67 stars)

    by Dean Taggart on 02/08/2013

    Nice features only if it would keep up with my truck. 0-60 time is lagging I can't get an accurate reading. My truck is going 80 by the time this catches up and says I'm going 60. Its accurate if you are just cruzing but that's what they make speedos for.

  • (67 stars)

    by Jeremy McGrath on 03/06/2013

    Quarter mile spot on top speed you have to hold it for a few seconds because the signal lags and 0 to 60 totally fucked up on my sportbike I'm running 3 seconds shows I'm running six is way off um Please Fix!
    Please Fix 0-60 times not acurate at all on my

  • (67 stars)

    by Darrell Webb on 26/03/2013

    It does just what it says. It's simple and doesn't require intrusive permissions. I don't believe perfect apps exist, otherwise I'd give it 5 stars.

  • (67 stars)

    by A Google User on 10/02/2013

    Small but to the point. Great tech support. 0.3s to quick on drag strip. Speed spot on. Love hands free start!

  • (67 stars)

    by Adam on 09/08/2012

    Really like this app as the 0-60 timer starts as soon as you accelerate, and so far I think the results haven proven quite accurate. Good app.

  • (67 stars)

    by Matt on 06/08/2012

    Works great, only one complaint: It apparently doesn't work well when you put your mobile device on hold. This makes it difficult to track my information while on a motorcycle because I accidentally select things while it's in my pocket.