# onsA440 vs Tuning Fork Pro

The clearest difference is price: onsA440 at Free against Tuning Fork Pro's $9.99. onsA440 also leads on in-app purchases (none vs 2) and ads (none vs shown). Tuning Fork Pro's advantage is rating (4.3 vs 2.3) and update cadence (every 2 weeks vs every 5 months). On device support there is nothing between them.

onsA440 is free to download; Tuning Fork Pro costs $9.99 up front. Tuning Fork Pro sells 2 one-off in-app purchases. onsA440 asks for nothing beyond the download.

Tuning Fork Pro holds the better App Store score, 4.3 against 2.3. That said, the two scores are not equally well evidenced: Tuning Fork Pro has 35 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 73% of onsA440's written reviews are positive against 42% of Tuning Fork Pro's, so the app with the better star average is not the one people write more warmly about.

onsA440 ships an update every 5 months, Tuning Fork Pro every 2 weeks. The most recent releases landed on October 5, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | onsA440 | Tuning Fork Pro |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [2.3 (3 ratings)](https://appshunter.io/ios/app/onsa440/id356108470/reviews) | **[4.3 (35 ratings)](https://appshunter.io/ios/app/tuning-fork-pro/id1390334198/reviews)** |
| Number of ratings | 3 | **35** |
| Positive reviews | **73.3% of reviews** | 41.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | **Free** | Paid |
| Size | 5 MB | 11 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Groov-in.](https://appshunter.io/developer/356108473) | [Pedro Daniel Macalupu Cumpen](https://appshunter.io/developer/492172409) |

## What reviewers say

### onsA440

[App page](https://appshunter.io/ios/app/onsa440/id356108470)

This simple tuning fork app generates a musical tone with a shake or tap. It stops the sound with another tap, making it a straightforward tool for musicians.

**Highlights:** Shake gesture activation, Tap gesture activation, Simple sound generation, For musicians

**Features:** macOS Compatibility

**In-app purchases:** none


### Tuning Fork Pro

[App page](https://appshunter.io/ios/app/tuning-fork-pro/id1390334198)

This app helps musicians tune their instruments by ear using precise tone generation. It offers a wide range of notes and calibration options with various waveform selections. The app is designed for ease of use and compatibility with external audio devices.

**Highlights:** Note generation from A1 to C7, A4 Calibration (415Hz to 466Hz), Sine, Square, Triangle, Sawtooth waveforms, Output volume control, Precise tone emission algorithm, External speaker compatibility

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |
| A4 Calibration & Harmonics | $1.99 | one-time |


## Frequently asked questions

### Is onsA440 free?

onsA440 is free to download, with no in-app purchases.

### Is Tuning Fork Pro free?

Tuning Fork Pro costs $9.99, and also offers in-app purchases.

### Which has better reviews, onsA440 or Tuning Fork Pro?

Tuning Fork Pro is rated higher. onsA440 averages 2.3 out of 5 from 3 ratings, while Tuning Fork Pro averages 4.3 from 35 ratings.

### Do onsA440 or Tuning Fork Pro have ads?

Tuning Fork Pro shows ads; onsA440 does not.

### Which is updated more often, onsA440 or Tuning Fork Pro?

onsA440 ships an update every 5 months, and Tuning Fork Pro every 2 weeks. Most recently, onsA440 was updated on October 5, 2026 and Tuning Fork Pro on October 11, 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.*