Soundbox - Custom Soundboard is the best customizable iOS soundboard app available on the iPhone. With this app, users can upload their own sound effects and create their own custom soundboards. Whether you want to prank your unsuspecting friends with funny or scary sound effects, or simply have a collection of your favorite sounds at your fingertips, Soundbox has got you covered.

One unique feature of Soundbox is its compatibility with Apple Watch. Users can control the app directly from their Apple Watch, allowing for convenient access without ever having to pull out their phone. This makes it even easier to play sound effects in any situation.

The app also comes with a wide range of preloaded sounds, including popular memes and soothing nature sounds. However, if you don't see your favorite sound effect in the app, you have the option to upload them yourself or request new sound effects by emailing

Overall, Soundbox - Custom Soundboard is a versatile and user-friendly app that allows users to create and enjoy their own personalized soundboards. It offers a great selection of preloaded sounds and the ability to upload or request new ones, making it the perfect choice for sound enthusiasts.