# CLOK by NTTU vs Speak Dummy

The clearest difference is in-app purchases: CLOK by NTTU at none against Speak Dummy's 2. CLOK by NTTU also leads on iOS requirement (11.0 vs 13.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Speak Dummy sells 2 in-app purchases, starting at $3.99 per month. CLOK by NTTU asks for nothing beyond the download.

CLOK by NTTU ships an update every 2 weeks, Speak Dummy every 3 weeks. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | CLOK by NTTU | Speak Dummy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 64 MB | 33 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Foreknowledge CO., LTD.](https://appshunter.io/developer/1414102159) | [Oleg Gusev](https://appshunter.io/developer/1724978854) |

## What reviewers say

### CLOK by NTTU

[App page](https://appshunter.io/ios/app/clok-by-nttu/id1561122134)

**Features:** macOS Compatibility

**In-app purchases:** none


### Speak Dummy

[App page](https://appshunter.io/ios/app/speak-dummy-practice-talking/id6475727941)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly full access | $3.99 | per month |
| Annual full access | $14.99 | per year |


## Frequently asked questions

### Is CLOK by NTTU free?

CLOK by NTTU is free to download, with no in-app purchases.

### Is Speak Dummy free?

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

### Do CLOK by NTTU or Speak Dummy have ads?

Neither CLOK by NTTU nor Speak Dummy shows ads.

### Which is updated more often, CLOK by NTTU or Speak Dummy?

CLOK by NTTU ships an update every 2 weeks, and Speak Dummy every 3 weeks. Most recently, CLOK by NTTU was updated on November 7, 2026 and Speak Dummy on November 4, 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.*