Entonal Tuner vs FrobulatorAU
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Entonal Tuner
This app allows you to tune instruments to any imaginable scale, from perfect harmony to extreme dissonance. It accurately recreates global traditional music and can also function as a standard instrument tuner. Explore scales by playing their notes before tuning your instrument.
- Tune to any scale
- Explore scales by playing notes
- Adjust root note frequency
- Recreate traditional music
- Standard instrument tuner function
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Tune your instrument to any scale you can imagine. Perfect harmony, or super sharp dissonance, and everything in between. Accurately recreate traditional music from around the world, as well as pre-modern western music. Or use it as a standard instrument tuner! Each scale can be selected, and its notes can be played to get a feel for it before tuning your instrument. Each scale may have a different root note (1/1), and the root note frequency (1/1) can be adjusted while tuning. Entonal Tuner was created when the developer began to learn about Just Intonation and microtonal music. He soon found that it, although some tuning apps support different temperaments and scales, they are difficult to edit, and not a "first class citizen". So the seed was planted... and Entonal Tuner was born.
FrobulatorAU
This audio effect plugin transforms sounds with spectral delay, adding unique character to music projects. It's a free and open-source tool designed for use in various audio applications, offering extensive creative possibilities.
- Spectral delay effect
- AUv3 plugin
- Use in GarageBand, AUM, and other DAWs
- Multiple instances per project
- Free and open-source
- No ads or in-app purchases
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Venerable inter-app audio effect Frobulator reborn — at long last — as an AUv3 plugin. Use it in GarageBand, AUM or your favourite audio application. Add multiple instances in the same project. Drag your frobulation kicking and screaming into the 21st century. Frobulator is a spectral delay effect. It makes your noises a little bit stranger. Twiddle the knobs to find something you like, or don't and throw it away. No-one will hold it against you. Frobulator is free as in beer and free as in speech. Freer, probably, given the state of both those things these days. No ads, no in-app purchases, no subscriptions, no surveillance, no nag screens. If you happen to be one of the 6 people who asked for this, rejoice! If you aren't, now's your chance to discover what you've been missing all this time. Or not. I'm not the boss of you.
Screenshots
Verdict
The clearest difference is rating: FrobulatorAU at 5.0 against Entonal Tuner's 4.3. FrobulatorAU also leads on in-app purchases (none vs 1). Entonal Tuner's advantage is update cadence (every 3 days vs every 9 days) and iOS requirement (12.0 vs 17.0). On price, ratings volume, 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. Entonal Tuner sells 1 one-off in-app purchase. FrobulatorAU asks for nothing beyond the download.
FrobulatorAU holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 14 and 8 respectively.
Entonal Tuner ships an update every 3 days, FrobulatorAU every 9 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.
| Parameter | Entonal Tuner | FrobulatorAU |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (14 ratings) | 5.0 (8 ratings) — better |
| Positive reviews | 85.7% of reviews | — |
| Number of ratings | 14 — better | 8 |
| Update frequency | Every 3 days — better | Every 9 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 17 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Node Audio | Matthew Caldwell |
Customer experience
Entonal Tuner
FrobulatorAU
In-app purchases
Entonal Tuner
- Upgrade to Pro$3.99
FrobulatorAU
No in-app purchases








