# Groove Number — swing %, bpm, key, on-device > swing %, bpm, key, on-device (iPhone/iPad app by Joshua Langberg.) - Source: https://appshunter.io/ios/app/groove-number/id6786836303 (this page in markdown: same URL + `.md`) - Developer: [Joshua Langberg](https://appshunter.io/developer/6778935245) - Category: Music, Utilities - Price: $1.99 - Age rating: 4+ - Requires: iOS 17.0 · 3 MB - Languages: American English - Released: 2026-07-09 - Data updated: 2026-08-11 - User reviews in markdown: https://appshunter.io/ios/app/groove-number/id6786836303/reviews.md ## What is Groove Number? how swung is your track? groove number gives you the number. drop in a song, record a clip, or open the live mic — groove number listens and tells you the one thing drum machines flatten and great players bend: the groove. 50% is dead straight. ~66% is full triplet swing. most music that feels good lives in between, around 54–62%. now you can see it. and it's not just the number. what it reads • swing % — the hero. one honest number for how far off the straight grid the groove sits. • bpm — dual-estimator with an octave guard, so 174 never gets called 87. nudge it ×2 / ÷2 or tap the tempo to lock it, and the swing recomputes against the corrected grid. • key — chroma + krumhansl-schmuckler with a tuning estimate, shown with a confidence read and the runner-up key, so a close call never hides. four ways to see it • meter — the number, front and center: swing %, bpm, and key in one calm readout. • swing grid — the signature view. every onset plotted against the straight 8th/16th grid, colored on-time, late, or rushing. you can see the pocket. • spectrogram — mel-scaled heatmap, quiet to loud, low to high, with a frequency + dB scale. • chromagram — the 12 pitch classes over time, tonic marked. how it listens • a file you drop in or pick (mp3, m4a, aac, wav, aiff, flac) • a clip you record — it listens and stops on its own the moment the groove locks • the live mic — a running bpm + swing read in the room, with a VU level meter and a live spectrogram one more thing • groove → midi — export the groove as a midi clip, swing baked into the note timing. drop it on a drum track in any daw and it plays your pocket. built to be calm and honest • fully on-device. your audio is analyzed right on your iphone, ipad, or mac. nothing is uploaded. nothing is stored on a server. • no account. no sign-up. no ads. no tracking. • strongest on four-on-the-floor and electronic music. live, acoustic, and rubato material is harder — so groove number always shows its confidence and hands you the ×2/÷2 and tap-tempo overrides. wrong calls stay visible, never silent. one number for the feel of a track. plus everything you need to trust it. ## Version history (last 5 releases) ### 1.1.3 — 2026-07-17 new controls, smarter recording. - midi export is one tap now: the midi button sits right in the dock — take your groove straight to a daw. - record lives next to it. tap the mic, play the track, and it stops on its own the moment it has a solid bpm + swing — as long as it takes, not a second more. - tempo tools start open, with finer ±1 nudges. same on-device analysis. no account, no upload. ### 1.1.2 — 2026-07-15 the engine got sharper — no new screens this time, just a smarter groove number. fixed a common misread on hip-hop, trap, and shuffle grooves: busy hi-hats no longer trick the number into locking onto the wrong subdivision. reads more accurately at low volume (55-70 dB) — you don't have to crank it for a clean number. catches beats that used to get buried under a pad or drone, even at full volume. remembers your session: back-to-back reads on the same track stay locked to the same octave instead of randomly doubling or halving. same on-device analysis. no account, no upload. ### 1.1.1 — 2026-07-13 the whole app got a redesign — and the engine got smarter. new look: - the swing number is now the star: one big centered readout that fills the screen, with bpm and key in a quiet row below. - swing · bpm · key stay on screen in every view — grid, spectrogram, and chromagram now stretch edge to edge. - playback, view switching, and export all live in one dock at your thumb. every button has a name now. - analyze is now the first tab. record a clip and get your number faster. - ipad gets a real console: readouts on the left, full-height visualization on the right. new engine: - reads a lot more real music — busy mixes, quiet tracks, songs without drums up front. - the swing number now follows the player instead of a fixed grid, so human performances read true. - live mode stops dropping the beat during fills. same numbers you can trust, all on-device. no account, no upload. ### 1.1 — 2026-07-12 the whole app got a redesign. - the swing number is now the star: one big centered readout that fills the screen, with bpm and key in a quiet row below. - swing · bpm · key stay on screen in every view — grid, spectrogram, and chromagram now stretch edge to edge. - playback, view switching, and export all live in one dock at your thumb. every button has a name now. - load and export are two labeled menus — open a file, record a clip, share results, or save the groove as midi. - analyze is now the first tab. record a clip and get your number faster. - ipad gets a real console: readouts on the left, full-height visualization on the right, one transport across the bottom. same engine, same numbers, all on-device. no account, no upload. ### 1.0 — 2026-07-09 No release notes. ## More apps by Joshua Langberg - [Figmint](https://appshunter.io/ios/app/figmint/id6778935243) - [Bibliome](https://appshunter.io/ios/app/bibliome/id6782099149) - [More Garlic](https://appshunter.io/ios/app/more-garlic/id6782392934) - [Major Arcana Meals](https://appshunter.io/ios/app/major-arcana-meals/id6789919644) All apps by Joshua Langberg: https://appshunter.io/developer/6778935245 ## Related topics [groove number](https://appshunter.io/ios/topics/groove-number) · [groove shark](https://appshunter.io/ios/topics/groove-shark) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-11.*