# AcoSound vs CritiCalc

The clearest difference is update cadence: CritiCalc at every 2 weeks against AcoSound's every 2 months. AcoSound's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

AcoSound ships an update every 2 months, CritiCalc every 2 weeks. The most recent releases landed on July 19, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | AcoSound | CritiCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (12 ratings)](https://appshunter.io/ios/app/acosound/id1504604897/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 62 MB | 53 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 17+ |
| Developer | [HANGZHOU ACOSOUND TECHNOLOGY CO., LTD](https://appshunter.io/developer/1504604896) | [Jason Richmond](https://appshunter.io/developer/1659125082) |

## What reviewers say

### AcoSound

[App page](https://appshunter.io/ios/app/acosound/id1504604897)

This app facilitates the fitting of Bluetooth hearing aids from a specific brand. It provides guidance on medical services and emphasizes consulting professionals before use. The hearing aids are certified for sale in China and the USA.

**Highlights:** Bluetooth hearing aid fitting, Medical and health service guidance, Professional consultation advice, Device certification information, Regional sales restrictions

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

**In-app purchases:** none


### CritiCalc

[App page](https://appshunter.io/ios/app/criticalc/id1659125080)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AcoSound free?

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

### Is CritiCalc free?

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

### Do AcoSound or CritiCalc have ads?

Neither AcoSound nor CritiCalc shows ads.

### Which is updated more often, AcoSound or CritiCalc?

AcoSound ships an update every 2 months, and CritiCalc every 2 weeks. Most recently, AcoSound was updated on July 19, 2026 and CritiCalc on September 13, 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.*