OFFBEAT — Rhythm Trainer
Ska & jazz rhythm trainer
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
OFFBEAT is a rhythm training app built for ska punk and jazz musicians.
■ Train the "gap" a metronome can't teach you
Just tapping along with a metronome doesn't build the feel you need on stage.
OFFBEAT focuses on the genre-specific placement of rhythm — offbeats only,
the third note of the swing triplet, the 2 & 4 backbeat — and visualizes
your timing error in milliseconds.
■ 6 specialized training modes
- Offbeat Master (free) — the 8th-note offbeat that underpins ska cutting
- Swing Pocket (free) — the "third triplet" feel of jazz time
- 2 & 4 Backbeat — the shared backbone of jazz and ska
- Silent Keep — hold your internal groove through bars of silence
- Tempo Sprint — survive accelerating tempos without rushing
- Call & Response — hear a phrase, play it back
■ Output latency calibration
Measures the output delay of your earphones/speaker and folds it into
the judgment, resolving the feeling of being "off" when you're actually
on time. That said, since Bluetooth latency itself fluctuates, please
use wired earphones or a speaker.
■ Built to keep you coming back
- Three 30-day lesson courses (All-round / Ska focus / Jazz focus)
- Day-streak tracking with a weekly one-day protection freeze
- Timing diagnosis after every session: are you rushing or dragging?
- Score, accuracy and average offset recorded every run
[Pricing]
- The app is free to download.
- "Offbeat Master" and "Swing Pocket" are free forever, with no time limit.
- A single purchase unlocks the other four modes (2&4 Backbeat, Silent Keep, Tempo Sprint, Call & Response) and all three 30-day lesson courses (All-round, Ska, Jazz).
- This is a one-time purchase, not a subscription. Once you buy it, the content listed above is yours to keep.
- After reinstalling or switching devices, use "Restore Purchase" in Settings.
■ Privacy
All play data stays on your device. Nothing is transmitted
(see the privacy policy for details).
For you if:
- You play in (or want to join) a ska punk or jazz band
- You can follow a metronome but can't sit in the groove
- You've ever been told you rush on the offbeats
— From the developer
I've played in a ska punk band and spent years touring the jazz cafés of Japan,
yet I never trusted my own sense of rhythm. Metronomes and method books
didn't fix it. "It isn't talent — there has to be a way to train this."
So I built it with the one skill I did have: programming. That's how OFFBEAT began.
Not for people who already have rhythm, but for those who struggle, like I did.
Starting with ska and jazz — and someday, for every player, in every genre.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
■ Purchase improvements
・Fixed "Restore purchase" reporting that no purchase was found when it simply could not reach the store. If your purchase status cannot be checked, we now say so instead.
・The price shown is now only the one we receive from the App Store. If it cannot be loaded, you can try again with "Reload the store".
・Fixed the purchase button staying unresponsive when the store did not reply.
■ Saved records
・Fixed previously saved records being discarded silently when the stored data was damaged.
・The home screen now tells you when your records cannot be saved.
The developer, YUKIO SAITO, 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
- YUKIO SAITO
- Size
- 3.2 MB
- Category
- Music
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Unlock 6 modes + 3 courses $5.99
- Copyright
- © Jazzcafe Freak
