# FourForty — Train your ears

> Ear training app for musicians to tune instruments by ear. (iPhone/iPad app by Ephraim Esson.)

- Source: https://appshunter.io/ios/app/fourforty/id1540469786 (this page in markdown: same URL + `.md`)
- Developer: [Ephraim Esson](https://appshunter.io/developer/1610275277)
- Category: Music, Music, Education
- Price: $1.99
- Rating: 5.00/5 from 3 App Store ratings
- Age rating: 4+
- Requires: iOS 14.1 · 5 MB
- Languages: English
- Released: 2021-01-24
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/fourforty/id1540469786/reviews.md

## What is FourForty?

Imagine you are playing guitar in front of thousands of people and suddenly one of your strings goes out of tune. This is not the time to whip out your favorite guitar tuning app but fear not! Because you have been practicing with FourForty you can tune with your ears alone. 

FourForty is here to help you tune your guitar using your ears. Just play a note then guess if you are sharp, flat, or in tune. We believe with practice our users will be able to tune their guitar without a tuner. Imagine that, never having to use a guitar tuner again! EPIC!!


Features
- Simple and easy to use
- Training mode where you guess if you are sharp, flat, or in tune
- Regular guitar tuner if you are not in the mood to train
- Graph to monitor your progress over time

## Key features

- Ear training mode
- Identify sharp, flat, or in tune
- Traditional guitar tuner
- Progress monitoring graph
- Simple and easy to use


## Frequently asked questions about FourForty

### How does FourForty help me tune my guitar?

FourForty offers a training mode where you play a note and guess if it's sharp, flat, or in tune. This repetitive practice helps develop your ear to tune instruments by sound alone, eliminating the need for a physical tuner.

### Can I still use FourForty as a regular tuner?

Yes, FourForty includes a regular guitar tuner function. This allows you to quickly tune your instrument when you're not in the mood for ear training exercises.

### What is the price of FourForty?

FourForty is available for a one-time purchase of $1.99.

### What devices is FourForty compatible with?

FourForty is designed for iOS devices, including iPhone and iPad.

### How often is FourForty updated?

The app was last updated on February 24, 2021, with version 1.0.4. It was initially released on January 24, 2021.

### What age rating does FourForty have?

FourForty has an age rating of 4+, making it suitable for a wide range of users.

### Does FourForty have ads?

The provided data does not indicate that FourForty contains advertisements. As a paid application, it is likely ad-free.

### How can I track my progress with FourForty?

FourForty features a graph that allows you to monitor your ear training progress over time, helping you see how your aural skills are improving.

## Version history (last 5 releases)

### 1.0.4 — 2021-02-24

Minor bug fixes.

### 1.0.3 — 2021-02-11

Fixed bug with progress graphs.

### 1.0.2 — 2021-01-30

Fixed look on dark mode.

### 1.0.1 — 2021-01-25

Small bug fixes.

### 1.0.0 — 2021-01-24

No release notes.

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## More apps by Ephraim Esson

- [WallStreetSlider](https://appshunter.io/ios/app/wallstreetslider/id1534913795)
- [LogFish](https://appshunter.io/ios/app/logfish/id1575655966)
- [Bar4Bar](https://appshunter.io/ios/app/bar4bar/id1610456257)
- [FiveSongs](https://appshunter.io/ios/app/fivesongs/id6463801699)

All apps by Ephraim Esson: https://appshunter.io/developer/1610275277

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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.*