# iDiapason vs A

The clearest difference is review sentiment: A at 61% against iDiapason's 0%. A also leads on rating (4.4 vs 1.0) and update cadence (every 6 weeks vs every 202 months). iDiapason's advantage is in-app purchases (none vs 4). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. A sells 4 one-off in-app purchases. iDiapason asks for nothing beyond the download.

A holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: A has 185 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 61% of A's.

iDiapason ships an update every 202 months, A every 6 weeks. The most recent releases landed on October 7, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | iDiapason | A |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/idiapason/id325550985/reviews) | **[4.4 (185 ratings)](https://appshunter.io/ios/app/a440-pro-tuner-tuning-fork/id335593282/reviews)** |
| Number of ratings | 1 | **185** |
| Positive reviews | 0.0% of reviews | **60.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 202 months | **Every 6 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 4 MB |
| Requires iOS | **16.6** | 17.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Punctus Multimedia](https://appshunter.io/developer/325550989) | [Paul Richardson](https://appshunter.io/developer/335593286) |

## 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


### A

[App page](https://appshunter.io/ios/app/a440-pro-tuner-tuning-fork/id335593282)

Easily generate a tuning tone with a single tap. Enhance convenience by setting up Siri Shortcuts for quick access, even adding them to your Home Screen or widgets. Adjust the frequency to your needs and enjoy a fuss-free tuning experience.

**Highlights:** Single-tap tone generation, Adjustable frequency (435–445 Hz), Siri Shortcut integration, Home Screen and widget shortcuts, iPad Slide Over compatibility

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 14-day Trial | Free | one-time |
| A–440 Standard | $2.99 | one-time |
| Upgrade to A–440 Premium | $2.99 | one-time |
| A–440 Premium | $4.99 | one-time |


## Frequently asked questions

### Is iDiapason free?

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

### Is A free?

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

### Which has better reviews, iDiapason or A?

A is rated higher. iDiapason averages 1.0 out of 5 from 1 ratings, while A averages 4.4 from 185 ratings.

### Do iDiapason or A have ads?

Neither iDiapason nor A shows ads.

### Which is updated more often, iDiapason or A?

iDiapason ships an update every 202 months, and A every 6 weeks. Most recently, iDiapason was updated on October 7, 2026 and A on October 23, 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.*