# Flat or Sharp vs Intonalogy

The clearest difference is price: Flat or Sharp at Free against Intonalogy's $4.99. Intonalogy's advantage is in-app purchases (none vs 7) and update cadence (every 6 months vs every 65 months). On rating, review sentiment, ratings volume and ads there is nothing between them.

Flat or Sharp is free to download; Intonalogy costs $4.99 up front. Flat or Sharp sells 7 in-app purchases, starting at $2.99 per month. Intonalogy asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Flat or Sharp against 5.0 for Intonalogy. Both are backed by a comparable volume of ratings — 8 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Flat or Sharp ships an update every 65 months, Intonalogy every 6 months. The most recent releases landed on June 10, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Flat or Sharp | Intonalogy |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [5.0 (8 ratings)](https://appshunter.io/ios/app/flat-or-sharp/id1522100449/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/intonalogy/id1535238157/reviews) |
| Number of ratings | **8** | 3 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 65 months | **Every 6 months** |
| Monetization | **Freemium** | Paid |
| Best chart rank | — | **#181** |
| Size | 4 MB | 56 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Euphorophonics, LLC](https://appshunter.io/developer/1464810513) | [Thomas Verrier](https://appshunter.io/developer/1535238159) |

## What reviewers say

### Flat or Sharp

[App page](https://appshunter.io/ios/app/flat-or-sharp/id1522100449)

This app helps you improve your musical ear by training you to identify flat or sharp intonation in musical intervals. It offers customizable difficulty levels, various interval types, and detailed progress tracking to guide your learning journey.

**Highlights:** Identify flat/sharp intonation, All musical intervals included, Customizable difficulty levels, Melodic and harmonic intervals, Progress tracking and streaks, Practice suggestions and tips

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flat or Sharp Premium (Monthly) | $2.99 | per month |
| Flat or Sharp Premium (Annual) | $14.99 | per year |
| Both Interval Directions | $0.99 | one-time |
| Remove Banner Ad | $0.99 | one-time |
| All Duration Options | $1.99 | one-time |
| All Accuracy Options | $2.99 | one-time |
| BUNDLE - All Premium Options | $4.99 | one-time |


### Intonalogy

[App page](https://appshunter.io/ios/app/intonalogy/id1535238157)

**Currently charting:** #181 Top Paid · Music (US App Store)

Hone your ear for music by training to precisely tune pitches in chords, scales, and melodies. Offers customizable practice modes and challenging tests with scoring. Includes features for educators to create and distribute assignments to students.

**Highlights:** Tune pitches in chords, scales, and melodies, Customizable training mode, Challenge mode with scoring, Classroom features for teachers and students, Support for equal temperament and just intonation, Detailed about page on just intonation

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Flat or Sharp free?

Flat or Sharp is free to download, with in-app purchases available.

### Is Intonalogy free?

Intonalogy costs $4.99, with no in-app purchases.

### Which has better reviews, Flat or Sharp or Intonalogy?

Flat or Sharp and Intonalogy are both rated 5.0 out of 5 on the App Store, from 8 and 3 ratings respectively.

### Do Flat or Sharp or Intonalogy have ads?

Neither Flat or Sharp nor Intonalogy shows ads.

### Which is updated more often, Flat or Sharp or Intonalogy?

Flat or Sharp ships an update every 65 months, and Intonalogy every 6 months. Most recently, Flat or Sharp was updated on June 10, 2026 and Intonalogy on September 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*