All articles ← Knowledge Base Audio Playback Problems on Some Fire Devices Can I apply the upgrade to multiple apps? Can I customize which apps are in a bundle? Can I make my own bundle? Can I use Bluetooth headphones? Does each app have just one script? How do "App Bundles" work? How do I give this app to someone as a gift? How do I listen to just the background sounds? How do I play multiple apps in succession? How do I quit/exit the app? [Android] How do I rewind or fast forward? How do I stop/pause the audio? [iOS] How do I transfer my purchase to a different platform? How do I turn off the instructions/introduction? How do I use this app with an Apple Watch? [iOS] How does hypnosis work? How long will it take to notice changes? I bought a bundle in the past, but now it's saying I didn't purchase the upgrade I love this app!!!! I need a topic you don't offer I only hear the voice, not the background sound I previously paid for the app, but I was charged again I tapped Restore In-App Purchase, but it says I haven't upgraded I upgraded a free app. How can I apply that purchase toward a bundle? I upgraded an app on my phone. How do I get the upgrade applied on another device? I upgraded one of the free apps in the past, but now it's asking me to pay again If I restore the upgrade, will I be charged again? Instructions for Use Is the audio available in MP3 format? Is the upgrade a monthly subscription? It says I haven't purchased this app before, but I have My app is exhibiting strange behavior [Android] My app is exhibiting strange behavior [iOS] My app is stuck installing or updating [Android] My app is stuck installing or updating [iOS] No Known Issues [Android] No Known Issues [iOS] The app triggers Siri unexpectedly The Hypnotic/Sleep Booster won't work The volume is too low or I can't hear anything We have a Family Sharing iTunes account and I can't restore the upgrade What if I fall asleep while listening? What is included in the upgrade? What is the "Restore In-App Purchase" button? What is the Booster and how does it work? What is the difference between the free and "pro" versions? What other hypnosis topics do you offer? What's the best way to use multiple topics/apps? What's the difference between the inductions in the sleep app? Why can't I get a bundle on my Android device? Why is the script for the Self-Esteem app so different from the others? Will hypnosis work better/faster if I listen more often? Will I lose control while I'm under hypnosis?