Tune My String vs HollowTone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tune My String
This chromatic tuner offers high accuracy for professionals and an intuitive wizard for beginners. It supports a wide range of stringed instruments and various temperaments, with multiple language options.
- Intuitive tuning wizard
- High accuracy chromatic tuner
- Supports 14 instruments and 55 tunings
- Multiple temperament options
- Configurable A4 frequency
- Traditional accuracy meter
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================ "A Killer Tuner with an adaptable UI for beginners and advanced musicians!" (Apps4iDevices) ================ Tune My String is a chromatic tuner for stringed instruments. Professional musicians will appreciate the high accuracy of the tuner, the quick tone identification and the configurations of A4 frequency and different temperaments. Beginners will appreciate the tuning wizard which helps you to tune your instrument without knowledge of tuning of the individual instruments. Tune My String includes: • an intuitive tuning wizard that helps you to tune your selected instrument without knowledge of tuning • a traditional accuracy meter (showing accuracy in cents) • presentation of exact frequency as well as target frequency for closest tone • configuration of A4-frequency • tuning definition of 14 instruments (Guitar, Bass guitar (4, 5 and 6-stringed), Violin, Viola, Cello, Contra bass/Double bass, Balalaika, Banjo (4, 5 and 6-stringed), Mandolin and Ukulele) with a total of 55 different tunings • different temperaments: Equal temperament, Pythagorean tuning, Quarter-comma meantone, 5-limit Symmetric N.1, 5-limit Symmetric N.2, 5-limit Asymmetric Std, 5-limit Asymmetric Ext, 7-limit tuning, 17-limit tuning App-languages: English, Chinese, Finnish, French, German, Hungarian and Swedish.
HollowTone
Explore immersive soundscapes with a procedural audio instrument. Shape evolving ambient worlds with intuitive gestures for meditation, relaxation, or creative projects. Discover new sonic environments with expressive macro controls and a built-in randomizer.
- Procedural audio generation
- Intuitive gesture-based control
- Nine macro parameters for soundscape shaping
- Built-in randomizer for discovery
- Works as standalone, AUv3, Inter-App Audio, Audiobus
- Meditative and immersive sound environments
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HollowTone is a place to explore sound as atmosphere - a quiet world of shifting textures, deep pulses, fluid motion, digital flicker, and soft human-shaped warmth. It isn't a traditional synthesizer or a simple ambient player. It's a procedural audio instrument that lets you shape entire environments with just a few gestures, creating spaces that feel alive, mysterious, and gently immersive. Each layer inside HollowTone behaves like its own living entity, generated entirely in real time without samples. Blend them together and new forms emerge: fog-like air, cavernous resonance, flowing noise, glitchy sparks, or distant vocal presence. These sound worlds work beautifully as meditative backgrounds, relaxation environments, dreamlike spaces, or darker atmospheres for games, videos, and creative projects. Despite the complexity beneath the surface, HollowTone is easy to navigate. The nine macro parameters let you shift the entire soundscape with subtle, expressive control, while the built-in randomizer offers quick ways to discover new ideas - from gentle variations to completely unexpected worlds. Whether you're seeking calm, tension, inspiration, or a place to wander, HollowTone invites you to explore sound intuitively. No rules, no fixed paths - just a quiet landscape waiting to be shaped. HollowTone is a universal application for iOS and macOS. It can work on iPhone and iPad as well as Mac M1 and later. HollowTone works on iPhone and iPad standalone, as an Audio Unit or Inter-App Audio module, and supports Audiobus and Ableton Link. On MacOS, HollowTone can works both as a standalone application and as an Audio unit (AUv3) with DAWs and other hosts that support AUv3 plugins. HollowTone has a built-in detailed description of all parameters also available as PDF file on the application site. Quick start demo: https://youtu.be/Iu6w2b5ToZI You can find more information on HollowTone and other creative audio apps at: https://motion-soundscape.blogspot.com
Screenshots
Verdict
The clearest difference is rating: HollowTone at 5.0 against Tune My String's 3.7. HollowTone also leads on chart position (#167 vs unranked). Tune My String's advantage is price ($1.99 vs $9.99) and iOS requirement (8.0 vs 16.0). On ratings volume, ads, in-app purchases and monetization model 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
Tune My String costs $1.99 and HollowTone $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
HollowTone holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 2 respectively.
| Parameter | Tune My String | HollowTone |
|---|---|---|
| Price | $1.99 — better | $9.99 |
| Rating | 3.7 (3 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 24 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #167 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 3 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | ILLOM | Igor Vasiliev |
Customer experience
Tune My String
HollowTone
In-app purchases
Tune My String
No in-app purchases
HollowTone
No in-app purchases





