# teach clk vs Colourful Semantics Classic

The clearest difference is price: teach clk at Free against Colourful Semantics Classic's $8.99. Colourful Semantics Classic's advantage is in-app purchases (none vs 1) and update cadence (every 2 months vs every 36 months). On ads and device support there is nothing between them.

teach clk is free to download; Colourful Semantics Classic costs $8.99 up front. teach clk sells 1 one-off in-app purchase. Colourful Semantics Classic asks for nothing beyond the download.

teach clk ships an update every 36 months, Colourful Semantics Classic every 2 months. Both last shipped on October 27, 2026.

## The numbers

| Metric | teach clk | Colourful Semantics Classic |
| --- | --- | --- |
| Price | **Free** | $8.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 2 months** |
| Size | 54 MB | 260 MB |
| Requires iOS | 26.2 | **15.0** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [mind Technology](https://appshunter.io/developer/505395264) | [Therapy Box Limited](https://appshunter.io/developer/404445010) |

## What reviewers say

### teach clk

[App page](https://appshunter.io/ios/app/teach-clk/id1524244498)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Teaching Clock IAP | $9.99 | one-time |


### Colourful Semantics Classic

[App page](https://appshunter.io/ios/app/colourful-semantics-classic/id6569246022)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is teach clk free?

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

### Is Colourful Semantics Classic free?

Colourful Semantics Classic costs $8.99, with no in-app purchases.

### Do teach clk or Colourful Semantics Classic have ads?

Neither teach clk nor Colourful Semantics Classic shows ads.

### Which is updated more often, teach clk or Colourful Semantics Classic?

teach clk ships an update every 36 months, and Colourful Semantics Classic every 2 months. Most recently, teach clk was updated on October 27, 2026 and Colourful Semantics Classic on October 27, 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.*