# True Tone — Tone generator for musicians

> Musical tone generator for instrument tuning and intonation practice. (iPhone/iPad app by Ulf Akerstedt-Inoue.)

- Source: https://appshunter.io/ios/app/true-tone/id1033051604 (this page in markdown: same URL + `.md`)
- Developer: [Ulf Akerstedt-Inoue](https://appshunter.io/developer/959565661)
- Category: Music, Utilities, Music
- Price: $0.99
- Rating: 1.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 15 MB
- Languages: English, Japanese, Chinese
- Released: 2020-04-28
- Data updated: 2026-07-28
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/true-tone/id1033051604/reviews.md

## What is True Tone?

True Tone plays any tone defined by a temperament. True Tone is useful in tuning instruments, or improving intonation of your instrument. 

The operation is simple, just swipe your finger to select a tone and press the fork symbol and instantly you will hear a continuous tone sounding.

Feature highlights
• Range of tone approximately A0 - C8
• High accuracy of tone synthesis
• Common waveforms other than sine waves available
• Several display patterns for accidentals
• Transposition possible for instruments with natural key other than C 
• Adjustable reference tone A4 in the range 400 - 480 Hz
• Preset temperament collection available

## Key features

- Tone generation for tuning
- Swipe to select notes
- Continuous tone playback
- Adjustable reference tone (A4)
- Transposition for different keys
- Multiple display patterns for accidentals
- Preset temperament collection

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/true-tone/id1033051604/reviews.md

### 1/5 — They are fraud

*2023-12-17*

They are fraud

### 1/5 — Crashes repeatedly

*2020-09-17*

Will play the A440 tone it is set to when it comes up. But press any option and it crashes

## Frequently asked questions about True Tone

### What is True Tone used for?

True Tone is a tone generator designed for musicians to help tune instruments and improve their intonation. It plays precise tones within a wide frequency range, allowing for accurate adjustments.

### How do I use True Tone to generate a sound?

Using True Tone is simple: swipe your finger across the screen to select the desired tone, then press the fork symbol. This will instantly produce a continuous tone.

### What is the price of True Tone?

True Tone is available for a one-time purchase of $0.99.

### What devices is True Tone compatible with?

True Tone is compatible with iPhone, iPad, and iPod devices.

### Does True Tone have ads?

No, True Tone is ad-free, providing an uninterrupted experience for musicians.

### What is the supported frequency range for True Tone?

True Tone supports a tone range of approximately A0 to C8, with an adjustable reference tone A4 between 400 and 480 Hz.

### Can True Tone be used for instruments not in the key of C?

Yes, True Tone supports transposition, making it suitable for instruments with natural keys other than C.

### How often is True Tone updated?

The latest version of True Tone was released on February 11, 2023, indicating regular updates to maintain functionality and compatibility.

## Version history (last 5 releases)

### 1.1.3 — 2023-02-11

• drag and drop import of temperaments
• bug fixes

### 1.1.2 — 2022-10-24

• fixed swiping though upper range C7 - B8
• fixed direction indicators for low and high octaves
• direction indicators now display when long pressing
• tiny adjustments of colors for consistency and better readability
• fixed upper limit 480 Hz of reference tone in UI

### 1.1.1 — 2022-09-07

• minor bug fixes
• minor UI improvements

### 1.1 — 2022-01-07

built for iOS 15
bug fixes

### 1.0.0 — 2020-04-29

No release notes.

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## More apps by Ulf Akerstedt-Inoue

- [Concert Pitch Instrument Tuner](https://appshunter.io/ios/app/concert-pitch-instrument-tuner/id1054760764)
- [True Beat](https://appshunter.io/ios/app/true-beat/id1289060785)
- [True Pitch](https://appshunter.io/ios/app/true-pitch/id1299377897)
- [True Strings](https://appshunter.io/ios/app/true-strings/id1344047199)
- [Pierrot - Preschool](https://appshunter.io/ios/app/pierrot-preschool/id1478227194)

All apps by Ulf Akerstedt-Inoue: https://appshunter.io/developer/959565661

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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 2026-07-28.*