# TTOK vs Hearing test instruments

The clearest difference is iOS requirement: Hearing test instruments at 12.1 against TTOK's 15. On price, update cadence, ads and in-app purchases there is nothing between them.

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

TTOK ships an update monthly, Hearing test instruments every 5 weeks. The most recent releases landed on September 15, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | TTOK | Hearing test instruments |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Size | 102 MB | 48 MB |
| Requires iOS | 15 | **12.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GUANDDONG TIANPU TECHNOLOGY GROUP CO.,LTD.](https://appshunter.io/developer/1637560013) | [Cemho Medical Technology (Guangdong) Co., Ltd](https://appshunter.io/developer/1643075084) |

## What reviewers say

### TTOK

[App page](https://appshunter.io/ios/app/ttok/id6478838524)

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

**In-app purchases:** none


### Hearing test instruments

[App page](https://appshunter.io/ios/app/hearing-test-instruments/id6736933056)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TTOK free?

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

### Is Hearing test instruments free?

Hearing test instruments is free to download, with no in-app purchases.

### Do TTOK or Hearing test instruments have ads?

Neither TTOK nor Hearing test instruments shows ads.

### Which is updated more often, TTOK or Hearing test instruments?

TTOK ships an update monthly, and Hearing test instruments every 5 weeks. Most recently, TTOK was updated on September 15, 2026 and Hearing test instruments on May 17, 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.*