PROtune vs StringPilot
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PROtune
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PROtune combines a precision instrument tuner, machine-learning-powered chord detection, and a tuning-aware chord library in one app for string musicians. Tune individual strings—even in noisy environments—identify chords as you play, or explore playable chord shapes adapted to your instrument and tuning. PRECISION TUNING • Achieve accuracy of up to 0.135 Hz—approximately 0.5 cent at A4 = 440 Hz • Isolate individual strings with Focus Mode for reliable tuning in noisy environments • Get responsive real-time pitch detection with minimal latency • Benefit from instrument-specific filtering, microphone calibration, dynamic input adjustment, and harmonic suppression • Set your preferred reference pitch instead of being limited to A4 = 440 Hz MACHINE-LEARNING CHORD DETECTION • Play a chord and see PROtune identify it from your microphone input • View the detected notes and note spectrum behind the result • Follow your chord history while playing • Set a capo position to display detected chords as the shapes you are actually playing • Clear the history with New Song whenever you begin a new progression STRING INSTRUMENTS & ALTERNATE TUNINGS PROtune supports a wide range of string instruments, including guitar, bass, ukulele, banjo, mandolin, violin, viola, cello, double bass, bouzouki, lute, dulcimer, and cittern. Choose from standard and alternate tunings such as Drop D, Half Step Down, Full Step Down, Open D, Open G, DADGAD, Low G, and more. TUNING-AWARE CHORD SHAPES • Explore multiple playable positions for each chord • Generate chord shapes adapted to the selected instrument and tuning • Find options across different areas of the fretboard • Use playability assessment that considers finger placement and hand ergonomics • Explore major, minor, seventh, diminished, augmented, suspended, and extended chords Whether you are tuning before a performance, identifying a progression, experimenting with alternate tunings, or searching for a new chord shape, PROtune gives you the tools in one focused workspace. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
StringPilot
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StringPilot is a focused tuner and metronome designed for guitarists, bassists and other string players. No social feed, no distractions – just accurate tuning and solid time. The large, clean tuning display shows your note, octave and cents deviation in real time, so you always know whether to tighten or loosen. Preloaded tunings like Standard, Drop D, Open G, Ukulele (GCEA) and Bass (Standard) let you switch setups in a tap. When it’s time to work on your timing, switch to the built‑in metronome. Adjust BPM with fine controls, tap in a tempo you hear, and choose subdivisions to match your exercise or song. StringPilot uses a dark, minimal interface that’s easy on the eyes in practice rooms, studios and stages. Open the app, pluck a string, and get back to playing.
Screenshots
Verdict
The clearest difference is in-app purchases: StringPilot at none against PROtune's 5. StringPilot also leads on update cadence (every 4 days vs monthly). On price, ads, device support and iOS requirement 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. PROtune sells 5 in-app purchases, starting at $0.99 per year. StringPilot asks for nothing beyond the download.
PROtune ships an update monthly, StringPilot every 4 days. The most recent releases landed on October 25, 2026 and October 17, 2026 respectively.
| Parameter | PROtune | StringPilot |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 61 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | SilkIdea s.r.o. | 浩铭 顾 |
In-app purchases
PROtune
- Tuner Subscription3 Days trial$0.991 Year
- Chord Display Subscription3 Days trial$0.991 Year
- PROtune+$1.991 Month
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- PROtune+$9.991 Year
- PROtune+$19.99
StringPilot
No in-app purchases









