I have major problems on the current (0.9.3) version (official (read: non-pirated) one; as a customer of all previous CameraTweak versions, I could upgrade to this version for free.) Test device: iPhone 6s+ on 9.0.1. It seems it just can't save the modded value after the second modification. I set it to 240 (max) in 720p mode; after that, all other modes started to use their maximal frame rate (e.g., 1080p at 120p). I could only set it back to 30 fps by the traditional way (Settings > Photos & Camera > Record Video). The setting here, however, doesn't stick - when you change the resolution in CameraTweak 4 again, the old setting will creep back and you again need to pay a visit to Settings > Photos & Camera > Record Video to reset the new resolution's FPS etc. This is a MAJOR issue as all resolutions are affected, even if you only change the FPS in one of them. That is, for the time being, do NOT change the video FPS from inside CameraTweak 4! If the dev doesn't fix this issue, I'll look into it myself. I'm pretty confident I can fix it (by hacking the file system). Nevertheless, I do hope Samball fixes this bug. Otherwise, I can only recommend the tweak. Thanks to the new, vastly improved control features of the Camera API in iOS9, the tweak allows for accessing almost(?) everything possible via the new API (manual focus, manual/fixed ISO, manual shutter speed etc.). This means you can use the stock Camera-specific, absolutely essential features (HDR, the 6s/6s+'s exclusive Live Mode) not available (stupid Apple!) to third-party apps TOGETHER with the manual settings. The latter have only been available in third-party apps so far but not in the (except for exposure compensation) auto-only Camera app. Nevertheless, as 3rd party apps don't have access to the HDR / Live Mode, you could just not have the best of both worlds. Now you can. This tweak is a MAJOR reason for jailbreaking! Congrats, Samball! EDIT: I've mailed the developer. Hope he reacts quickly. EDIT 2 (23/08 07:14EET): please see #6 for a (temporary, but working) solution to the currently known bugs!