SpeedUPSI vs Video Speed Shift

SpeedUp lets you adjust the playback speed of any video on your device. Speed up slow footage, slow down fast moments, or create smooth time-lapse effects -- all without leaving your phone.

Change how fast your videos play, then save the result to your photo library. Pick a video from your library or record one in the app, choose a speed, and watch the change right away. When it looks right, save it. The new video is written as its own file — your original is left exactly as it was. FOURTEEN SPEEDS 0.1x, 0.25x, 0.5x, 0.75x, 1x, 1.25x, 1.5x, 1.75x, 2x, 3x, 4x, 6x, 8x, 10x. The slider steps between them, so you can feel each one without looking. Take a golf swing down to a tenth of speed, or push a long clip through at ten times. SEE IT BEFORE YOU SAVE The preview plays at the speed you picked, so you are never guessing at the result. Play, pause, and scrub anywhere in the clip while you decide. AUDIO PITCH, YOUR CHOICE Changing speed normally drags the pitch along with it, and voices come out squeaky. Keep the pitch where it was, or let it ride with the speed for the classic effect. One tap either way. PORTRAIT AND LANDSCAPE Whatever orientation you shot in comes back the same way, at the resolution you started with. EVERYTHING STAYS ON YOUR DEVICE Your video never leaves it. There is no account to create, no upload, no ads, no analytics, and no crash reporting. The app asks for the camera and microphone only when you record, and for permission to add to your photo library only when you save. That permission is add-only, so the app cannot read what is already in your library. Picking an existing video goes through the system photo picker, which hands over just the one you chose. Free, with nothing to unlock.