Runifier
Sync music to your cadence
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Cadence-synced Apple Music, a high-precision metronome, and voice-coached pace updates — built for runners who train by tempo.
Runifier locks your music to your running rhythm. Set a target
cadence, tap Start, and every Apple Music track speeds up or slows
down so its beat lands on each step. A high-precision metronome
clicks in sync, and a voice coach calls your pace out loud as you go.
KEY FEATURES
• Cadence-synced Apple Music — pick a target BPM (120–200) and
Runifier time-stretches each track to match your stride.
• Per-song BPM memory — enter a song's BPM once and it's saved per
track, applied automatically the next time it plays.
• Sample-accurate metronome — generated live by AVAudioEngine; never
drifts, toggle the click on or off mid-run.
• Pace from Garmin or GPS — listens for Garmin Connect broadcasts
during your run and falls back to iPhone GPS + pedometer cadence
within five seconds if no watch signal is present.
• Voice pace coach — speaks current and average pace every 500 m,
1 km, 2 km, or 5 km, with automatic audio ducking so the music and
metronome step out of the way during each callout.
• Live dashboard — large current pace and target BPM displays,
connection status badge (Garmin / iPhone GPS), distance, average
pace, and steps per minute.
HOW IT WORKS
1. Choose a target cadence on the dashboard. 175 BPM is a sensible
starting point.
2. Queue a playlist or song from your Apple Music library.
3. Tap Start Workout. Music plays at the adjusted tempo, the
metronome clicks at your target, and pace tracking begins.
4. The voice coach announces pace at the interval you've set.
5. Drag the BPM slider any time — the music and metronome retune
instantly.
WHO IT'S FOR
Cadence-aware runners. Form-focused trainers. Marathoners who train
by rhythm. Garmin watch users who want their phone library to keep
pace with their wrist. Anyone tired of building "exactly 175 BPM"
playlists by hand.
APPLE MUSIC
An Apple Music subscription is required for playback. Tempo
adjustment works most reliably on tracks downloaded to your library;
streaming-only catalog tracks may not honour playback rate changes.
You can enter a Song BPM manually for any track and Runifier
remembers it.
PRIVACY
Runifier doesn't send your location, pace, music library, or BPM
entries off your device. All BPM data is stored locally. No
analytics, no ads, no third-party trackers.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Hidong Kwak, 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
- Hidong Kwak
- Size
- 8.7 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.5 or later.
- iPhone
Requires iOS 26.5 or later. - Mac
Requires macOS 26.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.5 or later.
- iPhone
- Location
- This app may use your location even when it isn’t open, which can decrease device battery life.
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Hidong Kwak