# D-Tuner — Tuner, Score & Metronome

> Tuner, Score & Metronome (iPhone/iPad app by seokjae heo.)

- Source: https://appshunter.io/ios/app/d-tuner/id6824849152 (this page in markdown: same URL + `.md`)
- Developer: [seokjae heo](https://appshunter.io/developer/1777826721)
- Category: Music, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Released: 2026-10-21
- Data updated: 2026-10-23

## What is D?

D-Tuner is a free tuner for performers. Big note names and a cents meter show at a glance whether you are in tune, and a metronome and score reader are one tap away in the same app.

TUNER
- Large note name, octave and cents deviation
- Designed to read low notes (around bassoon Bb1)
- A4 reference from 438 to 442 Hz
- Several meter styles: Standard, Seam, Ribbon, Orbit
- A friendly bear shows the tuning state

METRONOME
- Tempo and beats per bar, with beat dots
- Start or stop from the tuner or the score screen

SCORE
- Open PDF and image scores
- Annotate with pen, highlighter and eraser, then export an annotated PDF
- Open the tuner from the score without leaving it
- Turn pages with Bluetooth remotes or pedals that send arrow keys or Page Up/Down

PRIVACY
- No account, ads or tracking
- Microphone audio is analyzed on the device only and is never saved or sent
- Scores and notes stay on your device

## Is D safe?

Not enough ratings yet to assess D.

## Is D legit?

D-Tuner has limited verification signals. The AppsHunter Legitimacy Score for D is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-10-21

No release notes.

## More apps by seokjae heo

- [영단어앱](https://appshunter.io/ios/app/id6737773966)

All apps by seokjae heo: https://appshunter.io/developer/1777826721

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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 2026-10-23.*