# Double Bass Tuner Professional — Strings Tuner

> Professional double bass tuning app with accurate frequency display and calibration. (iPhone/iPad app by Pedro Daniel Macalupu Cumpen.)

- Source: https://appshunter.io/ios/app/double-bass-tuner-professional/id900942326 (this page in markdown: same URL + `.md`)
- Developer: [Pedro Daniel Macalupu Cumpen](https://appshunter.io/developer/492172409)
- Category: Music, Utilities
- Price: $14.99 with in-app purchases
- Rating: 3.80/5 from 16 App Store ratings · 18 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 7 MB
- Languages: American English, Arabic, Armenian, Catalan, Czech, Danish, Dutch, Finnish, French (France), German (Germany) and 23 more
- Released: 2014-07-31
- Data updated: 2026-08-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/double-bass-tuner-professional/id900942326/reviews.md

## What is Double Bass Tuner Professional?

Tune your double bass instantly with precision and ease!
Optimal for beginners, intermediate and advanced musicians!

· The most accurate - displays the exact sound frequency in Hz.
· Calibration for A: 392Hz, 415Hz, 432Hz, 440Hz, 441Hz, 442Hz, 443Hz, 444Hz, 466Hz. 
· Instant load and fastest tuning! - Optimized for latest devices.
· Highest responsiveness and sensitivity.
· Intuitive user interface with LED tuning indicator.
· Visual indicators - tuned string lights up.
· Universal app - works with iPhone, iPad and iPod touch.
· Advanced settings (A4 Calibration, Mic sensitivity, Sound notifications) and Tuning fork!
(as in-app purchases)

What our users say: 

"Does what it promises - Very useful app." 

"This app makes tuning so easy!" 

"By far the greatest and most accurate contrabass tuning app. Play the string, read its chart and you know whether you're in tune." 

"Amazing! Outstanding, well spent money! 

"All contrabassists should have this app!" 

"It's very useful for me! Thank you!" 

"Excellent app" 

"Very convenient software. Suitable for any skill!" 

--- 

Please make sure to allow microphone access to this app when prompted. 
Check it under Settings>Privacy>Microphone. Thank you. 

--- 

Got ideas? Questions? 

Please send us your feedback through our site or to feedback@daikyoujulabs.com

## Key features

- Accurate frequency display in Hz
- Multiple calibration options
- Instant loading and fast tuning
- Intuitive UI with LED indicator
- Visual tuned string indicator
- Advanced settings and tuning fork

## Pricing and in-app purchases

Base price: $14.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Settings | $1.99 | one-time |
| Tuning Fork | $1.99 | one-time |


## Recent user reviews (10 of 18)

All indexed reviews: https://appshunter.io/ios/app/double-bass-tuner-professional/id900942326/reviews.md

### 1/5 — Where’s My Tuning Fork?

*2021-11-28*

I paid for the app, but the tuning fork and the Settings button don’t function?! What difference is there between this and the free app?!

### 5/5 — Bass tuner

*2020-08-26*

I really love the accuracy and reliability!

### 1/5 — Fake und Abzocke

*2020-01-15*

Hier wird Geld in mehreren Schritten Geld abgezogen, ohne dass das Produkt überhaupt reagiert. Vorsicht!

### 2/5 — I can’t get it working.... although it could be my lack of knowledge

*2019-04-12*

Would be nice to have clear instructions too help you through this....I would really appreciate some help too get this working!

### 1/5 — Schrott

*2019-02-07*

App gekauft und sie kann nur die Hz Zahl angeben. Alles weitere muss dazu gekauft werden. Zum Stimmen unbrauchbar

### 5/5 — Bass tuner

*2018-12-17*

Simple to use and accurate, I like that it tells you the frequency of the open string E1, A1 ECT

### 5/5 — In tune

*2018-05-07*

As a beginner, this application has been very helpful in keeping me in tune.

### 1/5 — Upright Bass player

*2018-03-04*

So far the worst app I ever purchased from AppStore! The graphics are so bad, it’s really hard to see the Hz numbers to be able to fine tune your instrument and it doesn’t respond to the sound most of the times! I’m using a brand new iPhone 8 Plus and the microphone is in a good working condition!

**Developer response:** Hello, upright bass player. 

Your review is very valuable to us, feel free to review the latest update. Thank you so much.

Have a nice day,

Daikyouju Labs

### 5/5 — Best double bass app

*2017-05-16*

Best app for tuning upright/double bass I've found. Easy to read worth every penny

### 5/5 — Tolle App...

*2016-10-23*

...welche nach dem Update hervorragend funktioniert, einfach zu handhaben.

## Frequently asked questions about Double Bass Tuner Professional

### What is the price of Double Bass Tuner Professional?

Double Bass Tuner Professional is a paid app priced at $9.99. This one-time purchase grants you access to all its features for tuning your double bass.

### Does Double Bass Tuner Professional have ads?

No, Double Bass Tuner Professional is ad-free. You can enjoy a seamless tuning experience without any interruptions from advertisements.

### What devices does Double Bass Tuner Professional support?

Double Bass Tuner Professional is a universal app that works with iPhone, iPad, and iPod touch devices. It is optimized for the latest devices for fast and responsive performance.

### How accurate is Double Bass Tuner Professional?

The app provides the most accurate tuning by displaying the exact sound frequency in Hz. It also offers calibration options for various frequencies, ensuring precise tuning for your double bass.

### Can beginners use Double Bass Tuner Professional?

Yes, Double Bass Tuner Professional is optimal for beginners, intermediate, and advanced musicians. Its intuitive user interface with LED tuning indicators and visual cues makes tuning easy for all skill levels.

### What are the advanced settings in Double Bass Tuner Professional?

Advanced settings include A4 Calibration, Mic sensitivity adjustment, Sound notifications, and a Tuning fork. These features are available as in-app purchases, offering more control and customization for your tuning needs.

### How often is Double Bass Tuner Professional updated?

The latest version, 3.9.8, was last updated on October 24, 2025. Updates typically bring performance improvements and new features, ensuring the app remains reliable and up-to-date.

### What is the age rating for Double Bass Tuner Professional?

Double Bass Tuner Professional has an age rating of 4+. This indicates it is suitable for users of all ages and does not contain any content that would be inappropriate for children.

## Version history (last 5 releases)

### 3.9.9 — 2026-05-11

· Optimization for the iPhone 17 Pro Max, iPad Mini and latest iPads.
· A4 Calibration, Tuning fork and Settings (as In-App Purchases).
· Performance improvements and bug fixes

### 3.9.8 — 2025-10-24

· Optimization for the iPhone 17 Pro Max, iPad Mini and latest iPads.
· A4 Calibration, Tuning fork and Settings (as In-App Purchases).
· Performance improvements and bug fixes

### 3.9.7 — 2025-10-15

· Optimization for the iPhone 17 Pro Max, iPad Mini and latest iPads.
· A4 Calibration, Tuning fork and Settings (as In-App Purchases).
· Performance improvements and bug fixes

### 3.9.6 — 2025-06-25

· Optimization for the iPhone 16 Pro Max, iPad Mini and latest iPads.
· A4 Calibration, Tuning fork and Settings (as In-App Purchases).
· Performance improvements and bug fixes

### 3.9.5 — 2024-11-03

· Optimization for the iPhone 16 Pro Max, iPad Mini and latest iPads.
· A4 Calibration, Tuning fork and Settings (as In-App Purchases).
· Performance improvements

## Apps similar to Double Bass Tuner Professional

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Double Bass Tuner Basic](https://appshunter.io/ios/app/double-bass-tuner-basic/id1420917410) | 4.2 (190) | Free | Music |
| [Bass Tuner Professional](https://appshunter.io/ios/app/bass-tuner-professional/id889683288) | 4.1 (35) | $14.99 | Music |
| [Tuner - Guitar, Ukulele, Bass](https://appshunter.io/ios/app/tuner-guitar-ukulele-bass/id1457948103) | 4.0 (33) | Free | Music |
| [Metronome Tuner \| Practice+](https://appshunter.io/ios/app/metronome-tuner-practice-plus/id858142974) | 4.4 (2,812) | Free | Music |
| [Tuner & Metronome -Soundcorset](https://appshunter.io/ios/app/tuner-and-metronome-soundcorset/id918055824) | 4.2 (997) | Free | Music |
| [n-Track Tuner Pro](https://appshunter.io/ios/app/n-track-tuner-pro/id662934229) | 4.8 (91) | $12.99 | Music |

## More apps by Pedro Daniel Macalupu Cumpen

- [Acoustic Guitar Tuner Basic](https://appshunter.io/ios/app/acoustic-guitar-tuner-basic/id588151563)
- [Acoustic Guitar Tuner Pro](https://appshunter.io/ios/app/acoustic-guitar-tuner-pro/id588152864)
- [Violin Tuner Professional](https://appshunter.io/ios/app/violin-tuner-professional/id802792057)
- [Viola Tuner Professional](https://appshunter.io/ios/app/viola-tuner-professional/id806811415)
- [Cello Tuner Professional](https://appshunter.io/ios/app/cello-tuner-professional/id807752194)
- [Ukulele Tuner Pro and Chords](https://appshunter.io/ios/app/ukulele-tuner-pro-and-chords/id815791310)

All apps by Pedro Daniel Macalupu Cumpen: https://appshunter.io/developer/492172409

## Related topics

[double bass tuner professional](https://appshunter.io/ios/topics/double-bass-tuner-professional) · [bass tuner professional](https://appshunter.io/ios/topics/bass-tuner-professional)

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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 2026-08-27.*