---
title: "Groove Number - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "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 pl"
---

# Groove Number — United States
> swing %, bpm, key, on-device

![Groove Number App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/39/59/c5/3959c5cf-66ac-ced1-c6de-b6e7e8fb452c/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png)

**Developer:** [Joshua Langberg](https://apptail.io/developer/joshua-langberg-MzVMuc)
**Category:** Music
**Rating:** 5.0/5 (1 ratings)
**Price:** $1.99
**Bundle ID:** com.langberg.swinganalyzer
**Store:** Apple App Store
**Country:** United States
**Version:** 1.1.4 (released 2026-09-02)
**Original Release:** 2026-07-09
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6786836303)
**AppTail Page:** [https://apptail.io/app/groove-number-VJTA/united-states](https://apptail.io/app/groove-number-VJTA/united-states)

## Groove Number Description
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.

## Groove Number Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/11/74/82/11748286-d872-a688-07f9-f65e9a56ec04/iphone-1-meter.png/1260x2736.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/11/19/67/1119675c-2bc7-2e64-3bc4-6eaf178e570e/iphone-2-grid.png/1260x2736.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/a4/5a/e8/a45ae8ea-c036-a836-9234-c3e3da72b100/iphone-3-spectrogram.png/1260x2736.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/1e/c7/da/1ec7daac-dae3-a46c-74ba-eb7212f697f7/iphone-4-chromagram.png/1260x2736.png)

## Groove Number Rating Breakdown in United States
- 5 stars: 1 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)



## Groove Number Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Paid | Japan | Music | #25 |




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