ThunderBeast
Rain, Wind & Thunder Synth
Free · In‑App Purchases
A synthesizer that makes rain. City presets recreate the weather of cities around the world, and the thunder button fires a different bolt every time.
Rain, wind and thunder, all synthesized in real time. No samples, no loops. Every storm ThunderBeast makes is a storm happening for the first time.
EIGHT CITIES, EIGHT SKIES
A New York night storm. London drizzle. A Miami squall. Seattle mist. The Bangkok monsoon. A Reykjavik gale. An evening shower in Kyoto. A Cape Town storm front.
Choose a preset and the scenery, the weather and the colour of the panel change together, so the city you are listening to is the city in front of you.
TEN WEATHER CONTROLS
Precipitation and drop size shape the rain; wind speed, gust and turbulence move the air.
Storm rate decides how often lightning happens and storm energy decides how heavy each strike lands, while cell distance walks the storm from directly overhead out to the horizon. Humidity and pressure change the whole feel of the sky, and width and gain finish it.
FOUR KINDS OF LIGHTNING
A crack at close range, thunder that rolls, strikes that repeat, a sheet of light across the whole sky - each one carrying the swell that comes back off the landscape. The bolt is drawn on screen as it happens and changes colour as the storm moves away. No two strikes are ever the same.
PLAYABLE WEATHER
Play from C2 up and the rain rings at that pitch. Chords and melodies come out of the falling rain. Play below C2 and lightning strikes instead: pitch sets the distance, velocity sets the weight. Twelve hardware controller presets are built in; the mod wheel is storm energy and the sustain pedal is lightning.
STANDALONE AND AUv3
Use it on its own, or as an AUv3 plug-in in GarageBand, Logic Pro and others.
START FREE
Three cities are free from the first launch. ThunderBeast Pro is a one-time purchase, not a subscription: it opens the remaining cities (eight in all) and adds recording and export to WAV, AIFF and FLAC.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Fixes an issue where the storm could start playing on its own after the app was sent to the background. Background playback is now off by default and can be turned on in Settings > Audio.
The developer, Tomocreate, Inc., 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Tomocreate, Inc.
- Size
- 66.1 MB
- Category
- Music
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later.
- iPhone
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- ThunderBeast Pro $9.99
- Copyright
- © 2026 Tomocreate, Inc.