Guitar Tuner+ vs OpenString
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Guitar Tuner+
This free application offers a comprehensive tuning solution for acoustic and electric guitars, as well as ukuleles. It caters to musicians of all skill levels with various tuning options and advanced features like chromatic tuning and left-handed mode.
- Acoustic & electric guitar tuning
- Ukulele tuning
- Chromatic tuner
- Multiple tuning presets
- Left-handed mode
- Custom calibration
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The best FREE guitar tuner app with no ads! Tune acoustic & electric guitars and ukulele! Great for both beginners and pros alike, our app is a must have for any musician. So what are you waiting for? Download our app free app now! TUNING OPTIONS • Tune Guitar (acoustic, classical, electric) • Tune Ukulele • Chromatic Tuner for Professionals • Multiple tuning options (Standard, Drop D , Open D, Open G and lots lots more) ADVANCED FEATURES • Chromatic Tuner • Left Handed Mode • Custom Calibration • 3D guitar designs • Manual and automatic tuning modes • Hands free tuning feedback Guitar Tuner+ is the best free tuner app for both beginners and professionals. Download Guitar Tuner+ today, it’s the easiest way to tune your guitar or ukulele with your iPhone!
OpenString
This app provides essential tools for guitarists, including a tuner, metronome, chord handbook, and a personal songbook. It offers all features upfront with no subscriptions or in-app purchases, allowing users to manage their own song charts and practice effectively offline.
- Guitar tuner
- Metronome with tempo and meter settings
- Chord handbook with fingerings and voicings
- Personal songbook for lyrics and chords
- Key transposition and capo preference
- Scale and shape finder
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Every guitar practice tool is included: tuner, metronome, chord handbook, and a personal songbook. No subscription, no account, and no catalog paywall. OpenString is built for guitarists who want the tools on their phone, not a rented song library. Install it from the App Store. You get the tuner, metronome, chords, and songbook. There is nothing left to unlock later. WHAT YOU GET Guitar tuner Tune a standard six-string guitar with the microphone. Choose a preset, let the app pick the string or choose it yourself, and play a reference note when you want a target pitch. Audio is processed on your iPhone. It is never recorded or uploaded. Metronome Keep time from 40 to 240 BPM. Tap a tempo, set the meter, choose subdivisions and accents, run a practice timer, or mute the click and follow the beat visually. Chord handbook Look up common major, minor, and seventh fingerings in standard guitar tuning. Search the handbook, save favorites, hear a reference voicing, and jump to alternate positions on the neck. Personal songbook Keep your own lyrics and chords. Transpose the displayed key and save a capo preference without rewriting the source chart. Add song metadata, build named setlists, practice with autoscroll, jump to chords used in a song, and import ChordPro. Create and edit on your phone, then export a backup to a destination you choose and restore it later. Song to chords Pick a song and get its chords and words together in one tap, ready to play and sing. Scale and shape finder Type a scale like A minor pentatonic and see its box shapes on the neck, with the fret positions you actually play them in. HOW THIS IS DIFFERENT There are no in-app purchases and no subscription. Every current tool is included with the app. The tuner, metronome, chord handbook, and songbook are not split across plans. No commercial song catalog is included. Your songbook is filled by you, whether you type it or import ChordPro. That is the point: your charts, your lyrics, your practice. The app works offline and needs no account. No feed. No ads in the app. WHO IT IS FOR Players who want a tuner, metronome, chord diagrams, and their own charts in one place. People who write songs, type lyrics and chords they already play, or import ChordPro. WHO IT IS NOT FOR OpenString does not rent you a library of popular songs or official tabs. If you want a commercial catalog behind a monthly plan, this is not that app. OpenString is built for guitar practice on iPhone.
Screenshots
Verdict
The clearest difference is in-app purchases: Guitar Tuner+ at none against OpenString's 1. Guitar Tuner+ also leads on ratings volume (1.9K vs 1). OpenString's advantage is update cadence (daily vs every 18 months) and rating (5.0 vs 4.6). On price, ads, monetization model and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. OpenString sells 1 one-off in-app purchase. Guitar Tuner+ asks for nothing beyond the download.
OpenString holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Guitar Tuner+ has 1.9K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 83% of Guitar Tuner+'s written reviews are positive against 100% of OpenString's.
Guitar Tuner+ ships an update every 18 months, OpenString daily. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.
| Parameter | Guitar Tuner+ | OpenString |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (1.9K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 82.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 1.9K — better | 1 |
| Update frequency | Every 18 months | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15 — better | 15.1 |
| Further details — not scored | ||
| Size | 168 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | Livintis W.L.L. | Techguyver Labs, LLC |
Customer experience
Guitar Tuner+
OpenString
Bugs and requests
Guitar Tuner+
Reported bugs
2 issues- Unable to detect strings
- Incompatible with newer devices
Requested features
2 requests- Support for more tuning options (e.g. Drop C, Baritone)
- Add a tuning button
OpenString
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Guitar Tuner+
No in-app purchases
OpenString
- OpenString Pro$9.99









