KeyTuner

Name: KeyTuner
Rating: 4.7 (1688 reviews)
Author: TimperLabs LLC

By: TimperLabs LLC

Precision Instrument Tuner

Features & Capabilities

KeyTuner is a precision chromatic tuner designed for all instruments. It uses an advanced digital algorithm to deliver accurate tuning (0.1 cent) with a large, clear meter and a horizontal display that makes fine and coarse tuning easy to track.

Highlights include fast live tuning mode, tone generation, and a flexible temperament system (Just, Equal-Tempered, Strings). It supports transposing instruments, offers three levels of needle dampening, vibrato detection with a highlighted region around the needle, and concert pitch calibration for A4.

User Growth & Download Statistics

App Music & Audio Education

By:

TimperLabs LLC

Rating:

4.70

(1,688) 7 new ratings

Version:

2.1.1 Last updated: 2021-04-12

Version code:

841312229

Creation date:

2018-02-19

Compatible devices:

Size:

14.96MB

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-08

Compare stats and ranking:

Ranking

# 45,651 ▲ 23

For Developers

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Contact the developer

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Developed by:

TimperLabs LLC

Apple Apps Store

https://apps.apple.com/us/app/keytuner/id1328712601

Website:

https://www.timperlabs.com

User Reviews

Across reviews, KeyTuner is celebrated as an easy-to-use, highly accurate tuner that works well on guitars, keyboards, harmonicas, and other instruments. Users praise its clean, ad-free UI and the ability to fine-tune with cents ranges and micro-adjustments, plus visible swing ranges per note. It’s described as reliable enough for professional use and portable on iPad or iPhone. A few notes of caution appear: on rare occasions the app can misread the target note, the Just Intonation mode isn’t perfect for all contexts, and piano tuning can be limited without octave-stretching features.

Pros

Very easy to use with a quick tune workflow
Highly accurate and precise tuning
Works across many instruments (guitar, piano, harmonica, etc.)
Clean interface with no ads; free or ad-free
Fine-grained control: cents ranges, micro-range, and swing range display per note

Cons

Notes can occasionally be misread, causing the tuner to jump to neighboring pitches (e.g., D vs D#)
Just Intonation is not accurate for all tunings
Piano tuning support is limited due to lack of octave-stretching features

Recent reviews

앱 튜너중에 최고

by Ge*****, 2026-05-03

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.