# iDiapason vs Tuning Fork Pro

The clearest difference is price: iDiapason at Free against Tuning Fork Pro's $14.99. iDiapason also leads on in-app purchases (none vs 2) and ads (none vs shown). Tuning Fork Pro's advantage is rating (4.3 vs 1.0) and review sentiment (42% vs 0%). On device support and iOS requirement there is nothing between them.

iDiapason is free to download; Tuning Fork Pro costs $14.99 up front. Tuning Fork Pro sells 2 one-off in-app purchases. iDiapason asks for nothing beyond the download.

Tuning Fork Pro holds the better App Store score, 4.3 against 1.0. That said, the two scores are not equally well evidenced: Tuning Fork Pro has 35 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of iDiapason's written reviews are positive against 42% of Tuning Fork Pro's.

iDiapason ships an update every 202 months, Tuning Fork Pro every 2 weeks. The most recent releases landed on June 10, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | iDiapason | Tuning Fork Pro |
| --- | --- | --- |
| Price | **Free** | $14.99 |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/idiapason/id325550985/reviews) | **[4.3 (35 ratings)](https://appshunter.io/ios/app/tuning-fork-pro/id1390334198/reviews)** |
| Number of ratings | 1 | **35** |
| Positive reviews | 0.0% of reviews | **41.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 202 months | **Every 2 weeks** |
| Monetization | **Free** | Paid |
| Size | 3 MB | 11 MB |
| Requires iOS | 16.6 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Punctus Multimedia](https://appshunter.io/developer/325550989) | [Pedro Daniel Macalupu Cumpen](https://appshunter.io/developer/492172409) |

## What reviewers say

### iDiapason

[App page](https://appshunter.io/ios/app/idiapason/id325550985)

This app provides a precise digital tuning fork for musicians and choir directors. It offers a clean interface with reference pitches and a unique shake-to-play gesture, delivering an authentic and distraction-free tuning experience.

**Highlights:** Reference pitches (435-444 Hz), Real recorded tuning fork sound, Shake-to-play interaction, Smooth audio fade-out, Visual feedback animation, Minimalist design

**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 iDiapason free?

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

### Is Tuning Fork Pro free?

Tuning Fork Pro costs $14.99, and also offers in-app purchases.

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

Tuning Fork Pro is rated higher. iDiapason averages 1.0 out of 5 from 1 ratings, while Tuning Fork Pro averages 4.3 from 35 ratings.

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

Tuning Fork Pro shows ads; iDiapason does not.

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

iDiapason ships an update every 202 months, and Tuning Fork Pro every 2 weeks. Most recently, iDiapason was updated on June 10, 2026 and Tuning Fork Pro on September 10, 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.*