# CarlTune - Chromatic Tuner

> Chromatic tuner app for instruments, displaying pitch, frequency, and cent differences. (iPhone/iPad app by JUNG IL PARK.)

- Source: https://appshunter.io/ios/app/carltune-chromatic-tuner/id650709683 (this page in markdown: same URL + `.md`)
- Developer: [JUNG IL PARK](https://appshunter.io/developer/650206737)
- Category: Music, Utilities
- Price: Free with in-app purchases
- Rating: 4.30/5 from 59 App Store ratings · 32 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 8 MB
- Languages: American English, Arabic, French (France), German (Germany), Italian, Japanese, Korean, European Portuguese, Russian, Chinese (Simplified, China) and 4 more
- Released: 2013-06-04
- Data updated: 2026-09-07
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/carltune-chromatic-tuner/id650709683/reviews.md

## What is CarlTune?

This is a chromatic tuner that captures the sound coming into the microphone, analyzes it, and displays the pitch. It shows the frequency and octave of the analyzed pitch, and the difference (cent value) from the standard pitch at the same time, allowing you to know the current pitch more specifically and quickly. In addition, graphical interfaces such as analog clocks provide more intuitive and multi-dimensional information.
▶Main features:
● Colors : You can select almost any color.
● Notation : Supports US, Europe, Korea, Thailand, Japan, and India.
● Rotation : Supports landscape mode and portrait mode screen.
● Hit range : You can fine-tune by adjusting ±Cent value from the standard pitch.
● Tunings: Provides various instruments and custom tuning interfaces.
6 String Guitar (Standard, Standard D, Drop D, Double Drop D, EAEGBE, Open D, Open E, Open Dmaj7, Open Emaj7, Open D7, Open E7, Open D6, Open E6, Open D minor, Open E minor, Open G, Open A, Open Gmaj7, Open C, Open A minor, Dad Gad, Papa Papa), 4-string bass guitar, 6-string bass guitar, ukulele, violin, viola, cello, double bass, mandolin, mandola, Guitarelle
In addition, the default chromatic interface can be used for almost all instruments such as flute, kalimba, daegeum, gayageum, and vocal practice.
● Pitch pipe : Produces a mathematically accurately calculated frequency tone. Also, the piano keyboard interface and standard frequency values ​​can help you understand sounds and music.
● Visibility : You can adjust the graphic interface aspect ratio to fit the aspect ratio of the device screen.
● Transposition, concert pitch : You can change the most well-known tuning standard A4=440Hz. It also provides a transposition function for transposing instruments such as the clarinet, trumpet and saxophone.
● All features are free, including ads.
● You can remove ads by making in-app payment (paid purchase).

## Key features

- Chromatic tuning
- Pitch and frequency display
- Cent value adjustment
- Multiple instrument tunings
- Custom tuning options
- Pitch pipe with keyboard interface

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove ads | $3.99 | one-time |


## Recent user reviews (10 of 32)

All indexed reviews: https://appshunter.io/ios/app/carltune-chromatic-tuner/id650709683/reviews.md

### 1/5 — Too many adds

*2026-05-15*

Annoying

### 3/5 — Bugs

*2025-08-08*

Pls fix bugs.. app crashes frequently

### 5/5 — 좋아요

*2025-07-09*

Hz조정 자율이나 
보기도 편하고
사용도 편하고 복잡하지 않고 시원시원해요

### 4/5 — 앱내구입하고싶어요 어떻게 하는건가요?? 메뉴가 안보여요 ㅠㅠㅠㅠ

*2025-02-17*

구입어떻게하죠?????

### 4/5 — DadGad

*2025-01-10*

DadGad is EACEAE

### 1/5 — 작동되지 않아요

*2024-11-21*

앱 구매했는데 멈춰서 작동되지 않아요
문의 메일도 보냈는데 답이 없고요.

**Developer response:** 마이크 접근 권한이 허용되어야 합니다. 메일을 받지 못했습니다. 다시 한번 보내주세요.

### 5/5 — Five stars!

*2024-05-03*

Extremely helpful. Glad I purchased. Helps greatly with everything especially for practicing vocal slides.

### 5/5 — 유료 버젼 다운로드 어떻게 하는건가요?

*2024-02-26*

유료 버젼 다운로드 어떻게 하는건가요?

**Developer response:** 유료버전은 없고 광고제거 인앱구매만 있습니다. 메뉴 > 정보 > 광고제거 구매

### 3/5 — Ok

*2024-02-22*

Lived the app but had to delete. Constantly get stuck on ads and it got old fast. Good luck

### 1/5 — Ad removes by google

*2022-12-17*

What is it? After 3 time of using can not open...

**Developer response:** Please update to the latest version.

## Frequently asked questions about CarlTune

### What instruments does CarlTune support?

CarlTune supports a wide array of instruments including various guitar and bass tunings, ukulele, violin, viola, cello, double bass, mandolin, and more. It also offers a default chromatic interface suitable for instruments like flute, kalimba, and vocal practice.

### How accurate is CarlTune?

The app analyzes sound from your microphone to display pitch, frequency, and the difference (cent value) from the standard pitch, allowing for specific and quick pitch identification. It also provides a pitch pipe with mathematically accurate frequencies.

### Can I customize the tuning in CarlTune?

Yes, CarlTune offers custom tuning interfaces and allows you to adjust the ±Cent value from the standard pitch for fine-tuning. You can also change the standard tuning reference, such as A4=440Hz.

### Does CarlTune have ads?

Yes, CarlTune contains advertisements. Users have the option to remove these ads through an in-app purchase.

### What is the price of CarlTune?

CarlTune is available for free. There is an option to make a paid purchase within the app to remove advertisements.

### What devices is CarlTune compatible with?

CarlTune is designed for iOS devices, including iPhone, iPad, and iPod. It supports both landscape and portrait screen orientations.

### How often is CarlTune updated?

The latest version of CarlTune is 5.3.1, and it was last updated on December 14, 2025. This indicates a history of regular updates to improve functionality and performance.

### What is the age rating for CarlTune?

CarlTune has an age rating of 4+, making it suitable for a wide range of users, including younger musicians.

## Version history (last 5 releases)

### 5.3.1 — 2025-12-14

updated age ratings

### 5.3 — 2024-01-08

Added clef setting
Improved UI
Fixed bug

### 5.2 — 2023-12-28

Added layout option
Fixed bug

### 5.1 — 2023-12-14

Added note gauge
Improved UI
fixed bug

### 5.0.1 — 2023-12-08

fixed crash

## Apps similar to CarlTune

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Guitar Tuner - Ukulele & Bass](https://appshunter.io/ios/app/guitar-tuner-ukulele-and-bass/id662890455) | 4.4 (7,464) | Free | Music |
| [Guitar Tuner - Simply Tune](https://appshunter.io/ios/app/guitar-tuner-simply-tune/id1573260863) | 4.8 (102,856) | Free | Music |
| [Bass Tuner >>](https://appshunter.io/ios/app/bass-tuner/id1471438485) | 4.2 (705) | Free | Music |
| [GuitarTuna: Tune & Play Guitar](https://appshunter.io/ios/app/guitartuna-tune-and-play-guitar/id527588389) | 4.8 (146,520) | Free | Music |
| [Tuner Pro: Guitar Tuner & Tab](https://appshunter.io/ios/app/tuner-pro-guitar-tuner-and-tab/id1438248122) | 4.5 (45,211) | Free | Music |
| [Metronome Tuner \| Practice+](https://appshunter.io/ios/app/metronome-tuner-practice-plus/id858142974) | 4.4 (2,812) | Free | Music |

## More apps by JUNG IL PARK

- [MelodyLine - Music Painter](https://appshunter.io/ios/app/melodyline-music-painter/id657072353)
- [Lucky Girl (Lucky Number)](https://appshunter.io/ios/app/lucky-girl-lucky-number/id1463036423)
- [Lucky Girl (Paid version)](https://appshunter.io/ios/app/lucky-girl-paid-version/id1573707135)

All apps by JUNG IL PARK: https://appshunter.io/developer/650206737

## Related topics

[tabla tuner](https://appshunter.io/ios/topics/tabla-tuner) · [sitar tuner](https://appshunter.io/ios/topics/sitar-tuner)

---

*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 2026-09-07.*