Many of you maybe got confused because there were so many changes recently. So I decided to make things clear.
1. Versions of FreeFlight6
6.5.3 - updated last week. I don't know why parrot made this update but it was removed from Play Store few hours after its release
6.5.3 new - Parrot used the same version number with the previous one. There were some changes inside, so it's definately different version with 6.5.3
in-house 6.5.2 - Someone here found this apk file hidden on the Play Store button of Parrot's official website. This version updates your drone and controller's firmware to a dev version, 1.6.1-rc2, which you won't get back to the normal release until the firmware number goes higher than that.
6.6.0 - updated this week. This one includes FPV mode and Arcade mode. Your firmware will be updated to 1.6.0
6.6.0.1 - updated today. Version number is exactly same as 6.6.0 but there are differences inside. so I named it 6.6.0.1.
2. Firmwares of Anafi
1.5.x - official firmware used with FreeFlight 6.5.x
1.6.1-rc2 - a dev firmware updated with in-house apk. This firmware has no altitude limit, and nobody knows what kind of new features and settings are implemented.
1.6.0 - official firmware used with FreeFlight 6.6.0. This firmware also has no altitude limit.
3. In-app Purchase error
If you install and run in-house apk, your in-app purchase history will be messed up. I solved this problem buying features again in the official version of FreeFlight 6.
Someone reported that in-house apk uses a fake google pay module, so you may recover your purchase just rebuying in the in-house apk.(I haven't tested)
If your in-app purchases are not working in the modded app and if you have never installed in-house apk, log out all your google accounts and log in to your account that was used for in-app purchase only, and try reinstalling the app.
4. Altitude Limit
If your drone's firmware version is 1.6.0 or 1.6.1-rc2, there will be no altitude limit.
I'm not sure if Parrot will put the limitation again in the next firmware version.
5. Firmware Roll back
Firmware update won't allow you to downgrade your drone's firmware version. It is confirmed by Parrot developer.
6. Root access right
No root needed in order to use this mod app, to view app data in /data/data, and to use in-app purchesed features.
If you don't know what to do exactly, use 6.6.0.1 FCC and 1.6.0 firmware.
To parrot pilots here, please tell others what version of firmware you are using and what version of app you are using when you are talking about some bugs or any strange issues of your drone.