# Diapason: Guitar Tuner — Metronome & Practice Journal

> Metronome & Practice Journal (iPhone/iPad app by Muhammed Yusuf Guven.)

- Source: https://appshunter.io/ios/app/diapason-guitar-tuner/id6825560531 (this page in markdown: same URL + `.md`)
- Developer: [Muhammed Yusuf Guven](https://appshunter.io/developer/1850783846)
- Category: Music, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 6 MB
- Languages: American English, Arabic, Bangla, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France) and 34 more
- Released: 2026-10-22
- Data updated: 2026-10-26

## What is Diapason?

Tune precisely, keep steady time and practice with intent.

Diapason is a precise, quiet instrument for iPhone and iPad: a tuner, a pro metronome, reference tones and a practice journal, drawn like a piece of lab equipment. Ink on paper, hairline rules and a single green light that tells you when you're in tune. Start free, and unlock everything with Diapason Pro.

FREE
• Chromatic tuner for any instrument or voice, plus standard guitar tuning with automatic string detection
• A ±50-cent scale with an in-tune light and haptic confirmation
• Metronome from 20 to 400 BPM on a sliding tempo ruler, with time signatures and tap tempo
• Keeps playing in the background, with Lock Screen and Dynamic Island controls, a Control Center control and Siri Shortcuts
• Reference tones on a one-octave keyboard across six octaves
• Practice journal with a streak, a daily goal, your last seven days and Home Screen widgets
• Note names as C D E, Do Re Mi or German H

DIAPASON PRO
• Strobe tuner with 0.1-cent resolution
• Bass, ukulele, violin, viola, cello, double bass, mandolin, banjo, cavaquinho, bouzouki, balalaika and erhu, with 35+ tunings including Drop D, Drop C, DADGAD, Open G/D/E/C/A, Nashville, 7- and 8-string guitar and 5- and 6-string bass
• Your own custom tunings, with up to 12 strings
• A4 calibration from 400 to 480 Hz, transposition for Bb, Eb, F, G and D instruments, and six historical temperaments
• Subdivisions with triplets and swing, per-beat accents and four click sounds
• Setlists for your songs and exercises, plus speed trainer, gap trainer and polyrhythms
• Four timbres, a pure (beatless) fifth and ±50-cent fine tuning for reference tones
• Full practice history, a 12-week calendar, a tempo-progress chart and four signal colors

MADE FOR IPAD TOO
• Larger readouts in portrait, and two columns in landscape and Split View

PRIVATE BY DESIGN
No ads. No account. No data collected. Audio is analyzed on your device and is never recorded or uploaded.

Diapason Pro is available as a yearly subscription with a 7-day free trial, a monthly subscription, or a one-time lifetime purchase. Payment is charged to your Apple Account. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple Account settings.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Diapason Pro Yearly | $49.99 | per year |
| Diapason Pro Monthly | $9.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Diapason Pro Lifetime | $99.99 | one-time |


## Is Diapason safe?

Not enough ratings yet to assess Diapason.

## Is Diapason legit?

Diapason: Guitar Tuner appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Diapason is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-10-22

No release notes.

## Apps similar to Diapason

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Maqam: Eastern Tuner](https://appshunter.io/ios/app/maqam-eastern-tuner/id6768297508) | — | Free | Music |
| [Tuner App](https://appshunter.io/ios/app/tuner-app/id6782477145) | 5.0 (1) | Free | Music |
| [EXPANSION EXPLORER](https://appshunter.io/ios/app/expansion-explorer/id6477550974) | 3.0 (2) | Free | Music |
| [Baglama Tuner– Automatic Tuner](https://appshunter.io/ios/app/baglama-tuner-automatic-tuner/id6756604804) | — | Free | Music |
| [Baglama Lessons & Saz Tuner](https://appshunter.io/ios/app/baglama-lessons-and-saz-tuner/id1520458900) | 4.7 (9) | Free | Music |
| [Tunelimba - Kalimba Tuner](https://appshunter.io/ios/app/tunelimba-kalimba-tuner/id6747408471) | 3.9 (15) | Free | Music |

## More apps by Muhammed Yusuf Guven

- [Spendry: Budget & Debt Payoff](https://appshunter.io/ios/app/spendry-budget-and-debt-payoff/id6754893380)
- [Sismy: Live Earthquake Tracker](https://appshunter.io/ios/app/sismy-live-earthquake-tracker/id6793685409)

All apps by Muhammed Yusuf Guven: https://appshunter.io/developer/1850783846

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*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 2026-10-26.*