Sleepwave is a free app that offers a smart alarm clock and sleep tracker for iPhone users. It uses motion-sensing technology to track your sleep and wakes you up with gentle alarm sounds at the perfect moment. The app features a collection of original alarm sounds and allows you to create your own custom mix from a selection of soothing sounds in Sleepwave’s sound library.

One of the app's best features is its daily Wavescape, which lets you play with colorful patterns or relax with water ripples to help refresh and focus your mind. Sleepwave's free tier lets you use all features in the app for three nights per week without any purchase or commitment. The app also features a Haptic Smart Alarm Clock for Apple Watch and integrates with Apple Music and Apple Health.

Sleepwave respects your privacy and does not collect your personal details. The app uses your phone’s microphone to detect movement, but no audio data leaves your phone. Sleepwave offers a free version with limited access or unlimited access with a premium subscription. If you choose to subscribe, you will be charged a monthly or yearly subscription fee according to your country.

Overall, Sleepwave is a great app for anyone looking to improve their sleep and wake up feeling refreshed. The app is easy to use, offers a variety of features, and respects your privacy.