Fret & Key vs StringTrue
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fret & Key
This music app helps you identify chords, scales, and song keys. It features a chord finder, identifier, key finder, and an accurate tuner for various instruments. Designed for simplicity and speed, it offers essential tools without subscriptions or ads.
- Chord finder for piano and stringed instruments
- Chord identifier and key analysis
- Song key detection
- Scales and chord families
- Accurate instrument tuner
- Clean, quick navigation
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Find a chord, name the one you're playing, or hear a song and know its key. Scales, chord families, and an accurate tuner too, all in one beautifully simple app. No account, no subscription. It's the app you reach for mid-practice and set down thirty seconds later, having gotten exactly what you came for. Clean, quiet, and quick to navigate, built for piano and stringed instruments alike. What's inside: Chord finder for piano, guitar, and other stringed instruments Chord identifier: play a chord and it names it, and shows which keys it lives in Key finder: listens to a song, tells you its key, and sets the whole app to that key Chord families: the main chords in any key, at a glance Scales in every key, clear on both the fretboard and the keyboard An accurate tuner A clean Tools section that keeps each of these a tap away What's not inside: No subscriptions No ads No sign-up Just a beautifully simple tool that respects your time and your ears.
StringTrue
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StringTrue is a focused, easy-to-use guitar tuner. It starts detecting pitch as soon as you open it — no account, no ads, and no unnecessary setup. Features: - Standard, Drop D, Dsus4, Open G, Open D, and Half Step Down tunings - Chromatic mode with note, octave, frequency, and cents - Tap a string to lock its target; tap it again to return to automatic detection - Sound, animation, and haptic confirmation when stable within ±2 cents - Multiple A4 reference pitches with on-device preference saving - Audio is analyzed in real time only on your device and is never recorded or uploaded
Screenshots
Verdict
The clearest difference is in-app purchases: StringTrue at none against Fret & Key's 1. Fret & Key's advantage is update cadence (every 9 days vs every 3 weeks) and iOS requirement (15.0 vs 17.0). On price, ads 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. Fret & Key sells 1 one-off in-app purchase. StringTrue asks for nothing beyond the download.
Fret & Key ships an update every 9 days, StringTrue every 3 weeks. The most recent releases landed on October 11, 2026 and October 14, 2026 respectively.
| Parameter | Fret & Key | StringTrue |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 9 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 124 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Curious Labs | 冲 张 |
In-app purchases
Fret & Key
- Full Unlock$7.99
StringTrue
No in-app purchases









