PREPRO — Vocal Demos
Rap Recording, Comping & Pitch
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Make a demo. Just your phone.
Built for writing lyrics and vocal melodies, PREPRO keeps music-making simple—with tools for serious vocal demos.
Sound familiar?
• You hit record, but the flow you imagined while writing doesn't fit the beat.
• You're writing lyrics in a notes app and scrubbing back to your part over and over.
• You just want to record a melody, but you're stuck navigating an app full of features you don't need.
• You want to hear how a harmony sounds over your vocal, but layering it on your phone is a hassle.
• The first half of a take is perfect. The second half goes wrong, so you throw the whole thing away.
With PREPRO, loop the part of your beat you want, write your lyrics, and record right there. Layer harmonies and ad-libs, then combine the best parts of different takes into one demo.
Features
• Write lyrics while listening to a built-in beat or your own imported audio
• Loop any section to try out melodies and flows
• Record vocals with your lyrics in view
• Layer harmonies and ad-libs
• Keep the best parts of your takes with simple vocal comping
• Get that familiar pitch-corrected rap vocal sound—for free
• Automatically detect your beat's key and BPM
• Choose from six app themes to match your track's genre and mood
• Export MP3 mixes and WAV stems with VIP
Free and PREPRO VIP
With the free plan, you can create and save multiple projects using built-in beats. Lyric writing, recording, vocal layering, comping, and pitch correction are also free.
PREPRO VIP unlocks importing your own beats or backing tracks, MP3 mix exports, and WAV stem exports.
Monthly and annual subscriptions renew automatically. Manage or cancel your subscription in Apple's subscription settings. Restore purchases from within the app.
Terms of Use (Apple Standard EULA)
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy
https://oscillationfutures.com/prepro/privacy?lang=en#privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improved beat selection and the VIP pass display.
• Use Back on the audio import screen to return to the beat list and choose again.
• Fixed the bottom of VIP pass tickets being cut off.
• Rating requests are now spaced at least two calendar days apart.
The developer, JOUI YUASA, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- JOUI YUASA
- Size
- 35 MB
- Category
- Music
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
English and 2 more
- English, Japanese, Korean
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- プリプロ VIP（年額） $29.99
- プリプロ VIP（月額） $2.99
- Copyright
- © 2026 OSCILLATION FUTURES