I wrote an app that tells me time to a starting line where the official start is based on GPS time. My app needs the best location accuracy and the time from the GPS satellites. To get DGPS, I need an external module and for that I bought a Qstarz 100XT which has WAAS capability.

I cannot find an app to interface the module to my phone or tablet. Here is what I have tried and what the problem is:

1) Bluetooth GPS - loss of bluetooth lock without re-acquiring. Totally useless in a race situation.
2) Bluetooth GPS Provider - time reported is system time, not GPS time. I can set the system clock off 5 minutes and all my GPS apps thing the time is off 5 minutes. Totally useless.
3) GPS Mouse - same as #2.

In addition I would really like 5Hz update rate which Bluetooth GPS Provider has but more important is something that works, does not lose lock, and reports the GPS time not the system time.

I have read like 100 posts here on xda and Googled it for hours. I posted on stackoverflow without success.

Does anyone know of an app that really works for interfacing with an external GPS and reports distance and time from the satellites and reacquires when it loses lock?

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