# Flat or Sharp — Intonation Ear Training Quiz

> Musical interval intonation ear training quiz with customizable difficulty. (iPhone/iPad app by Euphorophonics, LLC.)

- Source: https://appshunter.io/ios/app/flat-or-sharp/id1522100449 (this page in markdown: same URL + `.md`)
- Developer: [Euphorophonics, LLC](https://appshunter.io/developer/1464810513)
- Category: Music, Education
- Price: Free with in-app purchases
- Rating: 5.00/5 from 8 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.6 · 4 MB
- Languages: American English
- Released: 2020-07-29
- Data updated: 2026-06-10
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/flat-or-sharp/id1522100449/reviews.md

## What is Flat or Sharp?

Learn how to hear whether musical intervals are flat or sharp by playing a fun quiz-style game!

Flat or Sharp includes all musical intervals from a minor 2nd all the way up to two octaves, in melodic or harmonic varieties. Difficulty levels are fully customizable with a variety of options to accommodate any level of musicianship, from beginner to seasoned pro. 

- Progressively hone your ear by setting desired tuning accuracy from +/- 50 cents all the way down to +/- 5 cents. 
- Play notes for as long as 4 seconds or as little as 0.2 seconds to work on how quickly you can recognize the intonation.
- Play intervals harmonically or melodically; ascending or descending.
- Adjust musical register and timbre of tones to suit your personal preferences.
- Track your progress with percentage correct and longest streak of correct guesses, viewable by time frame, so you can see how your ear improves with practice!
- Packed full of information on practice suggestions and tips for hearing each of the musical intervals!

## Key features

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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Flat or Sharp Premium (Monthly) | $2.99 | per month |
| Flat or Sharp Premium (Annual) | $14.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| All Accuracy Options | $2.99 | one-time |
| All Duration Options | $1.99 | one-time |
| Both Interval Directions | $0.99 | one-time |
| Remove Banner Ad | $0.99 | one-time |
| BUNDLE - All Premium Options | $4.99 | one-time |


## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/flat-or-sharp/id1522100449/reviews.md

### 5/5 — Great

*2022-10-03, version 1.0*

Great for its purpose!

### 5/5 — I need more practice

*2020-08-16, version 1.0*

I love the practice mode. Once I turned it off, I realized how much practice I really needed! I’m still working and this app is helping me get better every week.

### 5/5 — Great App

*2020-07-31, version 1.0*

We’ll constructed. Easy to use. Very useful.

### 5/5 — Cool

*2020-07-30, version 1.0*

This is a nice app that can help train one’s ear. Beginners and pros alike should be using something like this.

## Frequently asked questions about Flat or Sharp

### What musical intervals can I train with Flat or Sharp?

Flat or Sharp covers all musical intervals from a minor 2nd up to two octaves. You can practice these in both melodic and harmonic varieties, as well as ascending or descending.

### How does Flat or Sharp help me improve my ear?

The app allows you to progressively hone your ear by setting desired tuning accuracy from +/- 50 cents down to +/- 5 cents. You can also adjust note duration from 0.2 to 4 seconds to improve recognition speed.

### Can I customize the sound in Flat or Sharp?

Yes, you can adjust the musical register and timbre of tones to suit your personal preferences. This allows for a more tailored learning experience.

### How can I track my progress in Flat or Sharp?

Flat or Sharp tracks your progress with percentage correct and longest streak of correct guesses. This data is viewable by time frame, allowing you to see your ear improvement over practice periods.

### Does Flat or Sharp offer a free trial for its premium features?

Yes, Flat or Sharp offers a 2-month free trial for its premium subscription plans. The monthly plan is $2.99 and the annual plan is $14.99.

### What devices is Flat or Sharp available on?

Flat or Sharp is available on iPhone and iPad devices, making it accessible for users on the Apple ecosystem.

### How often is Flat or Sharp updated?

The latest version of Flat or Sharp is 2.0, and it was last updated on December 15, 2025. This indicates a recent update and ongoing development.

### What is the age rating for Flat or Sharp?

Flat or Sharp has an age rating of 4+, making it suitable for a wide range of users interested in music education.

## Version history (last 2 releases)

### 2.0 — 2025-12-15

This version features a full re-design of the app's appearance, various bug fixes, addition of the "in-tune" option, and a subscription option for the premium features.

### 1.0 — 2020-07-30

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*