# Double Bass Tuner vs FlexTunerPro

The clearest difference is ads: FlexTunerPro at none against Double Bass Tuner's shown. Double Bass Tuner's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 18.5). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Double Bass Tuner sells 2 in-app purchases, starting at $2.99 per 7 days and FlexTunerPro sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 21, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Double Bass Tuner | FlexTunerPro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (6 ratings)](https://appshunter.io/ios/app/double-bass-tuner-xtuner-pro/id6744967954/reviews)** | — |
| Number of ratings | **6** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 54 MB | 3 MB |
| Requires iOS | **12.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [NETIGEN Kluzowicz sp. j.](https://appshunter.io/developer/892331873) | [SATOSHI NAGASAKA](https://appshunter.io/developer/1826446450) |

## What reviewers say

### Double Bass Tuner

[App page](https://appshunter.io/ios/app/double-bass-tuner-xtuner-pro/id6744967954)

This free mobile application helps you quickly tune your double bass with professional-quality sounds. It offers auto, manual, and chromatic tuning modes, working offline for convenience. Customize settings like concert pitch and frequency filters for precise tuning.

**Highlights:** Offline tuning, Auto tune mode, Manual tune mode, Chromatic tuner mode, Customizable concert pitch (Hz), Frequency deviation in cents, Instrument head view

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 week subscription + trial | $2.99 | per 7 days |
| Forever one-time payment | $19.99 | one-time |


### FlexTunerPro

[App page](https://appshunter.io/ios/app/flextunerpro/id6751446919)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | one-time |


## Frequently asked questions

### Is Double Bass Tuner free?

Double Bass Tuner is free to download, with in-app purchases available.

### Is FlexTunerPro free?

FlexTunerPro is free to download, with in-app purchases available.

### Do Double Bass Tuner or FlexTunerPro have ads?

Double Bass Tuner shows ads; FlexTunerPro does not.

### Which is updated more often, Double Bass Tuner or FlexTunerPro?

Double Bass Tuner ships an update every 2 months, and FlexTunerPro every 2 months. Most recently, Double Bass Tuner was updated on October 21, 2026 and FlexTunerPro on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*