We've had a couple of reports from users saying their takes are in sync but when compiled the audio slips out of sync.
Please make sure you are not using any external mics when using the Slatable camera.
Save your takes to the Photos app and re-import to a new audition and compile. This should fix the sync.
Next, delete Slatable, restart your phone, and do a fresh install. Deleting the app will delete all videos and auditions so please save any content you wish to keep.
Please contact us if you're still having issues after a fresh install.