Gas Tracker vs Gas Buddy

[Zman1001]

Hello,
I am just trying to figure out what the difference between Gas Tracker and Gas Buddy is.

I used aCar on Android, but recently switched to ios, and am looking for something that will be similar.

From my understanding that is Gas Buddy, but it is still a work in progress to get the sync between Fuelly.com and the app (which is fine).

If I start using Gas Tracker (which I think has sync with Fuelly.com), whenever Gas Buddy v3 is released, will all of the data from Gas Tracker be able to transfer to Gas Buddy?

Any help I can get here on which one I should use will be helpful.
Thanks
Doug