Guitar Tuner!

Name: Guitar Tuner!
Price: 2.99 USD
Rating: 4.8 (354 reviews)
Author: Peter Deelstra

By: Peter Deelstra

Music

Features & Capabilities

Guitar Tuner! is an easy-to-use, extremely accurate audio/visual tuner for guitar. It shows exactly how many cents a note is out of tune and provides sub-second feedback to help you tune quickly and confidently. It supports standard tuning E-A-D-G-B-E plus many alternate tunings, and you can adjust the reference pitch from 400 Hz to 480 Hz to suit different instruments or environments.

A tap-to-hear option lets you verify pitches by ear, and Auto-string-detect can be enabled or disabled depending on your environment. Developed in Austin, Texas—the Live Music Capital of the World—this tuner is designed to make string winding and tuning straightforward for players of all levels.

User Growth & Download Statistics

App Music & Audio

By:

Peter Deelstra

Rating:

4.80

(354)

Version:

2.4 Last updated: 2017-12-11

Version code:

841390407

Creation date:

2010-11-02

Compatible devices:

Size:

13.34MB

Price:

2.99

URLs:

Website

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-11

Compare stats and ranking:

Ranking

# 89,344 ▼ 74

For Developers

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Contact the developer

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Developed by:

Peter Deelstra

Apple Apps Store

https://apps.apple.com/us/app/guitar-tuner/id400038851

Website:

http://sites.google.com/site/peterdeelstraapps/guitar-tuner

User Reviews

Reviews praise Guitar Tuner! for precise, cent-level tuning, a simple, visually clear interface, and strong support for alternate tunings, including open tunings. Users also value the one-time purchase price with no ads and its reliability across years of use. Some common concerns include occasional stability issues, requests for more open tunings (beyond what’s available, e.g., open E), battery usage when running, compatibility with newer devices, and occasional intrusive ads on the free version. Overall, it remains a highly trusted, easy-to-use tuning tool with excellent accuracy.

Pros

Very accurate tuning with cent-level precision (often within a cent or two).
Easy to use with an excellent, visually clear interface.
Strong support for alternate tunings and open tunings (including variations like 415 Hz).
One-time purchase with no ads; no subscription required.
Reliable and well-made with a long track record; many users rely on it as their go-to tuner.

Cons

Occasional stability/bug reports (tuner failing to register sound or crashing).
Incomplete tunings coverage; some users want more open tunings (e.g., open E).
Battery drain when left running in memory.
Some compatibility/update concerns on newer devices (older UI or infrequent updates).
Ads in the free version can be intrusive (mitigated by paying).

Recent reviews

Great app, thanks for all you do. I just learned about open tuning and of course this app supports that. I also just learned about playing 415hz, which this app supported me in learning more about and tuning into these different ways to play. Thanks for keeping it going.