iPhone app
Crank.
New — Crank. 2.0
A gym tracker for your tempo.
Most practice apps count minutes. Crank. tracks BPM on the fragments that matter — scales, licks, fills, passages. Log your speed, set a target, and watch the chart move. Guitar, piano, drums, anything with a tempo.
Free on iPhone3 fragments includedNo credit card
Practice like an athlete
Six screens. One idea: make your speed measurable, and it starts to move.
How it works
Add a fragment
A lick, scale run, drum fill — anything you want to speed up.
Log your BPM
One tap after each practice rep. Current tempo, target tempo, done.
Beat your PR
Charts and streaks show when you're actually getting faster — not just practising longer.
Crank. 2.0
What's new in 2.0
The biggest update since launch — practice sessions, goals, ranks, and the whole app in 8 languages.
Practice Sessions
Queue up fragments, run them back to back, and log everything in one guided flow — like a workout plan for your instrument.
Rank ladder
Ten ranks from Bronze to Mythic. Every logged practice hour pushes you up. Practice becomes a game you want to win.
Goals & streaks
Set weekly practice goals, protect your streak, and let the heatmap show your consistency at a glance.
Deeper stats
Weekly reviews, records, highlights, and per-instrument breakdowns — your practice data, actually readable.
Self-review
Rate how each fragment felt after a session. Feel + numbers together tell you when to push and when to consolidate.
8 languages
English, 繁體中文, 简体中文, 日本語, 한국어, Deutsch, Español, Português — the whole app, fully localized.
Built around speed, not sessions
Session timers and song libraries are useful. Crank. is for the moment you ask: am I actually playing this faster than last week?
Fragment-level BPM
Track speed on specific passages, not just session duration.
Progress charts
See your BPM climb over weeks. Data beats guesswork.
In Progress → Overdrive → Mastered
Three mastery states. Push past your target and keep going.
Built-in metronome & tuner
Tap tempo, subdivisions, multiple sounds — no switching apps.
Streaks & heatmaps
Stay accountable with visual practice history.
Collections
Group fragments by song, technique, or however you practise.
Log your first fragment today
Add a passage, set a target BPM, and start building a progress chart — free on iPhone.
Free on iPhone3 fragments includedNo credit card
Pricing
Free
$0
- Up to 3 fragments
- Basic logging & progress chart
- Built-in metronome & tuner
Pro
$3.99/mo or $29.99/yr
- Unlimited fragments
- Practice sessions & goals
- Full stats — streaks, heatmaps, highlights
- Collections & smart reminders
Questions
Crank. is a practice tracker for musicians. You add a practice fragment — a lick, riff, or technique — set a target BPM, and log your speed each session. The app shows your progress over time with charts, streaks, and practice ranks.
BPM gives you a measurable baseline. When you log your speed each session, you can see small gains that feel invisible in practice — like going from 92 to 97 BPM over two weeks. That data keeps you motivated and tells you when to push harder or consolidate.
All of them. Crank. works for guitar, bass, piano, drums, and any instrument where speed and accuracy matter.
Sessions let you queue several fragments and practise them back to back in one guided flow — with per-fragment timers, BPM logging, and a self-review at the end. It turns scattered practice into structured training.
Crank. 2.0 adds a ten-rank ladder from Bronze to Mythic. Logged practice time raises your level and rank. It is a long-term progress bar for your musicianship — climbing it takes months, not days.
A metronome keeps time. Crank. tracks your progress over weeks and months. It includes a built-in metronome and tuner, but the core feature is logging and visualising your improvement over time.
Yes. The free tier includes up to 3 fragments, basic logging, progress charts, and the built-in metronome and tuner — no time limit.
Crank. 2.0 is fully localized in English, Traditional Chinese, Simplified Chinese, Japanese, Korean, German, Spanish, and Brazilian Portuguese.
Crank. is built and maintained by Craftsman Interactive — one independent developer. Your subscription directly supports continued development.
Start tracking tempo
Free on the App Store for iPhone. Android coming soon.
Free on iPhone3 fragments includedNo credit card
Built by Craftsman Interactive