# KeyTuner — Precision Instrument Tuner

> Accurate and easy-to-use chromatic tuner for all instruments. (iPhone/iPad app by TimperLabs LLC.)

- Source: https://appshunter.io/ios/app/keytuner/id1328712601 (this page in markdown: same URL + `.md`)
- Developer: [TimperLabs LLC](https://appshunter.io/developer/1328180296)
- Category: Music, Utilities
- Price: Free
- Rating: 4.70/5 from 1,737 App Store ratings · 171 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 15 MB
- Languages: American English, Japanese, Chinese (Simplified, China)
- Released: 2018-02-19
- Data updated: 2026-08-30
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/keytuner/id1328712601/reviews.md

## What is KeyTuner?

KeyTuner is a full-range accurate and easy to use chromatic tuner that gives clear feedback with a visual design that makes maximum use of the screen. A consistent horizontal display for fine and coarse tuning allows easy tracking of the needle as a note is played. The display is suitable for both tuning and intonation practice. Quick mode provides fast confirmation in live situations. Tone generation is also supported for droning.

An advanced digital algorithm is used to allow precise tuning of all instruments (strings, woodwinds, brass, plucked string, etc). Many tuners have difficulty with low registers or those with many overtones but KeyTuner employs algorithms specifically aware of harmonic distributions. By taking advantage of the real-time behavior of multiple waveforms, vibrato can be detected and is shown as a highlighted region around the needle.

Features:
- Accuracy of 0.1 cent (0.001 semitone)
- Works with all instruments from A0 to C8
- Large easy-to-read meter for fine tuning
- Space efficient display for coarse tuning
- Quick mode for easy adjustments
- Color schemes: Light, Warm, Dark
- 3 levels of needle dampening to control responsiveness
- Temperament selection: Just, Equal-Tempered, Strings - Supports transposing instruments
- Tone/drone generation
- Concert Pitch (A4) calibration

## Key features

- Full-range chromatic tuning
- Visual feedback for fine and coarse tuning
- Advanced digital algorithm for precision
- Vibrato detection
- Tone generation for droning
- Supports transposing instruments
- Multiple color schemes

## What do users think of KeyTuner?

Overall sentiment: positive

**Pros**

- 🚀 Accurate and precise tuning
- 👍 Simple and user-friendly interface
- 🎨 Supports a variety of instruments
- 💰 Free with no ads
- 🔍 Detailed frequency and cents display
- ⚙️ Customizable settings and options

**Cons**

- 🐛 Occasional issues with note recognition
- 🔊 Microphone sensitivity can be inconsistent
- 🔢 Limited support for alternate tunings/temperaments

**Commonly reported bugs**

- App crashes or freezes on some devices
- Microphone input not working correctly

**Most requested features**

- Ability to save custom tuning profiles
- Metronome or rhythm generator function
- Support for more advanced instrument types

## Recent user reviews (10 of 171)

All indexed reviews: https://appshunter.io/ios/app/keytuner/id1328712601/reviews.md

### 5/5 — Flawless

*2026-07-27, version 2.1.1*

I used this tuner to set the intonation on my esp electric guitar. Works perfect. My chords are cleaner and crisper than ever. Good job!

### 5/5 — Accessible with Voiceover

*2026-05-25*

Plain language well labeled controls. Great as pitch pipe for Barbershop,or tuning a piano. Would like a slider on main screen to adjust note duration. Love this as a signal genrrater and free app. Very useful.

### 5/5 — Another vote for more tuning systems

*2026-05-09, version 2.1.1*

This app has a _very_ nice interface. The only defect, for me, is that it would be good to have other tunings included — 1/4-comma meantone is a quite common one for early instruments.

### 5/5 — 짱이에요

*2026-05-03, version 2.1.1*

앱 튜너중에 최고

### 5/5 — 素晴らしい

*2026-04-13*

チューナーアプリの中でいちばん良い。

### 5/5 — とても素晴らしい！

*2026-03-26*

いろんな楽器使えて、移調も対応オクターブも対応神すぎる！

### 5/5 — Key Tuner

*2026-03-15, version 2.1.1*

Love this tuner. As a guitarist, I use many different tunings or just down tuning to achieve the sound I’m looking for. Key Tuner gives me exactly that. Love it

### 5/5 — Guitar tuning

*2026-03-12*

this app’s accuracy exceeded most of the guitar tuner apps , while it doesn’t take up a lot of storage like they do. Love it.

### 5/5 — 很少给软件打分

*2026-01-29*

简洁又用无可挑剔还完全免费，五星好评

### 5/5 — Perfect Fine Tuning

*2026-01-12, version 2.1.1*

Smooth fine tuning. No “nervous” needle. 
Have been using this App now pretty much exclusively on guitars and even pedal steel guitars with complex setups. 
Thanks for this great and reliable App! … JD.

## Frequently asked questions about KeyTuner

### What does KeyTuner do?

KeyTuner is a chromatic tuner designed for precision and ease of use. It helps you tune a wide variety of instruments accurately by providing clear visual feedback and utilizing advanced algorithms to detect notes and even vibrato.

### What instruments can I tune with KeyTuner?

This app supports tuning for all instruments across a broad range, from A0 to C8. This includes string instruments, woodwinds, brass, and plucked string instruments, making it versatile for many musicians.

### Is KeyTuner free to use?

Yes, KeyTuner is available for free. The application does not feature in-app purchases or advertisements, offering a complete tuning experience without any cost to the user.

### How accurate is KeyTuner?

KeyTuner offers exceptional accuracy, with a precision of 0.1 cent, which is equivalent to 0.001 semitone. This high level of accuracy ensures that your instruments are tuned perfectly, even for demanding musical applications.

### What are the key features of KeyTuner?

Key features include a large, easy-to-read meter for fine tuning, a space-efficient display for coarse tuning, and a quick mode for fast adjustments. It also offers tone generation, vibrato detection, and support for transposing instruments.

## Version history (last 5 releases)

### 2.1.1 — 2021-04-12

Minor fixes

### 2.1 — 2021-03-25

- Tone generator updated to respect including transposition setting
- Added setting to specify displaying accidentals as flats or sharps
- Localized Instruments

### 2.0.1 — 2021-03-13

Minor update

### 2.0 — 2021-03-10

Refined User Interface
Updated Instrument Configurations
Fix to a rare bug which caused the tuner to behave poorly when switching between apps multiple times

### 1.8.6 — 2021-02-16

Stability improvements

## Apps similar to KeyTuner

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Tuner T1](https://appshunter.io/ios/app/tuner-t1/id453056916) | 4.5 (10,205) | Free | Music |
| [Tuner Lite by Piascore](https://appshunter.io/ios/app/tuner-lite-by-piascore/id635828559) | 4.5 (9,949) | Free | Music |
| [Pitched Tuner - Tuning App](https://appshunter.io/ios/app/pitched-tuner-tuning-app/id1457541750) | 4.6 (5,144) | Free | Music |
| [Metronome+](https://appshunter.io/ios/app/metronome-plus/id434136233) | 4.5 (1,199) | Free | Music |
| [Pitch Pro Tuner & Metronome](https://appshunter.io/ios/app/pitch-pro-tuner-and-metronome/id1169667039) | 4.6 (2,682) | Free | Music |
| [Smart Metronome & Tuner](https://appshunter.io/ios/app/smart-metronome-and-tuner/id889571826) | 4.7 (59,289) | Free | Music |

## More apps by TimperLabs LLC

- [KeyScore - Sheet Music](https://appshunter.io/ios/app/keyscore-sheet-music/id1329075116)

All apps by TimperLabs LLC: https://appshunter.io/developer/1328180296

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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 2026-08-30.*