quastion:Builds to Ios version (PPSSPP)

[Soulkey]

Hello all,

I have a quastion,
I see many builds versions on the PPSSPP DL.

what Is the best playble build for now?
and how I can know that without download&try all...
First I got 419 build and some games worked on my iphone 4S,
Now I installed 424 and 428, and the games dosen't work or got very low FPS.

Some help?
Thank you very much! and I really like this emulator, his amazing!!