Windtone by Sonofield vs Hark
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Windtone by Sonofield
This app offers a meditative ear training experience for musicians. It generates endless wind-chime melodies based on chosen scales, with adjustable complexity and real-time note labels. Enjoy a relaxing practice environment with natural ambiences and a tonic reference.
- Scale degree recognition
- Over 30 preset scales
- Real-time note labels
- Adjustable melodic complexity
- Natural background ambiences
- Tonic reference chime
- Playable chimes
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Windtone is a meditative ear training app for musicians who want to develop scale degree recognition. Simply choose a scale, relax, and tune in to an endless stream of gentle wind-chime melodies. Features: - Over 30 preset scales, sorted by family or mood - Real-time note labels: scale degrees, solfege, or letter names - Wind-gust inspired melody generation - Four levels of melodic complexity - Relaxing natural background ambiences - Tonic reference chime to keep your ear anchored - Playable chimes you can tap and strum - No user tracking - No ads - Free forever Windtone is a unique and immersive ear training experience that you can adapt to match your ability level. Its calming interface and pristine sounds create the perfect space for relaxed practice and extended training sessions. Listen while you work, walk, or wind-down at night.
Hark
This app trains musicians to identify notes within a musical key, focusing on their relationship to the tonic. It offers various training modes, including single notes, melodies, and chord progressions, with hands-free operation for convenient practice.
- Identify notes as scale degrees
- Hands-free training mode
- Multiple training modes (degrees, melodies, chords, progressions)
- Visual staff with colored notes
- Explore any note in any key
- Multiple instrument sounds
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Hark trains your ear the way musicians actually hear: every note as a degree of the key, not a distance from the note before it. A cadence — or a drone — puts the tonic in your ear. A note sounds. You answer on a ladder of degrees, with the home note at the bottom like the ground. Then the note walks home, step by step, back to the tonic, so you hear the pull instead of reading about it. That walk is the explanation. There is no lecture. FOUR KINDS OF TRAINING • Degrees — one note at a time, from two degrees up to all twelve • Melodies — short phrases, name every note in order • Chords in the key — I, IV, V and the rest, heard by function • Progressions — three and four chords in a row INSIDE • A ladder of seven colours: tonic gold, dominant blue, leading tone red • Notes on a staff, spelled the way the key spells them • The walk home after every answer • Hands-free: train with the screen off, on a walk or in the car. The key, the note, a pause for your answer, then the answer spoken aloud. • Explore: hold any degree in any key and listen. No score, no history. • Five instruments: piano, guitar, strings, choir, electric piano • Your map: accuracy by degree and by chord, and what your ear mixes up • Ten languages, and a ladder labelled with numbers, movable-do syllables or note names — Do–Si, Do–Ti, H and B where they belong FREE, FOR GOOD Five degree levels in C major — up to all seven degrees across two octaves — two melody levels, two chord levels, the first progression level, hands-free training, the staff, a week of statistics, and all of Explore: every degree in every key, there to listen to. No daily cap, no timers. HARK PRO — MONTHLY, YEARLY OR ONCE Training in all twelve keys, chromatic degrees, minor keys, three octaves, all seven chords with sevenths, progressions, melodies up to five notes, custom drills, and the full map of your ear with four weeks of history. Choose a monthly or yearly subscription, with a one-week free trial for eligible customers, or a one-time purchase for permanent Pro access. Only one free trial is available per subscription group. After the trial, the selected subscription renews at the price shown in the app. Subscriptions renew automatically unless cancelled at least 24 hours before the current period ends. Manage or cancel them in your Apple Account subscription settings. To avoid a charge after a free trial, cancel at least 24 hours before it ends. The free levels stay free either way. NO ACCOUNT, NO ADS No sign-up, no ads, no streaks and no nagging. Your individual answers and detailed training history stay on your device. The app sends a limited set of usage events with a random installation identifier, including session summaries and purchase or free-trial events, to help us understand how it works. The privacy policy lists what is sent. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://hark-ear.pages.dev/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: Windtone by Sonofield at none against Hark's 1. Windtone by Sonofield also leads on ratings volume (18 vs 1) and device support (3 vs 1). On price, rating, review sentiment and update cadence 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. Hark sells 1 one-off in-app purchase. Windtone by Sonofield asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.9 for Windtone by Sonofield against 5.0 for Hark. That said, the two scores are not equally well evidenced: Windtone by Sonofield has 18 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
Windtone by Sonofield ships an update every 5 days, Hark every 4 days. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.
| Parameter | Windtone by Sonofield | Hark |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (18 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 18 — better | 1 |
| Update frequency | Every 5 days | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 29 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Sonofield Ear Trainer Education Ltd. | Ilia Usatov |
Customer experience
Windtone by Sonofield
Hark
In-app purchases
Windtone by Sonofield
No in-app purchases
Hark
- Hark Pro$19.99









