# Algo vs Semaphore

The clearest difference is update cadence: Semaphore at every 5 days against Algo's every 15 months. Algo's advantage is iOS requirement (16.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Algo sells 3 in-app purchases, starting at $4.99 per month and Semaphore sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Algo ships an update every 15 months, Semaphore every 5 days. The most recent releases landed on October 11, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Algo | Semaphore |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/algo-coding-logic-puzzles/id6478955967/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 138 MB | 17 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Aleksei Liutykh](https://appshunter.io/developer/1609054018) | [Andrei Vasilev](https://appshunter.io/developer/6810123705) |

## What reviewers say

### Algo

[App page](https://appshunter.io/ios/app/algo-coding-logic-puzzles/id6478955967)

Engage with programming concepts through interactive puzzles. Control an arrow with commands based on real coding logic to solve increasingly complex challenges. Suitable for both beginners and experienced coders.

**Highlights:** Solve programming puzzles, Control arrow with commands, Learn coding logic, Progressive difficulty, Hints and tips provided, Suitable for all skill levels

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Patron Membership | $4.99 | per month |
| Patron Membership | $7.99 | per 2 months |
| Patron Membership | $8.99 | per 6 months |


### Semaphore

[App page](https://appshunter.io/ios/app/semaphore-accent-practice/id6810123703)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sémaphore Plus | $9.99 | per month |
| Sémaphore Plus | $69.99 | per year |


## Frequently asked questions

### Is Algo free?

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

### Is Semaphore free?

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

### Do Algo or Semaphore have ads?

Neither Algo nor Semaphore shows ads.

### Which is updated more often, Algo or Semaphore?

Algo ships an update every 15 months, and Semaphore every 5 days. Most recently, Algo was updated on October 11, 2026 and Semaphore on October 25, 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.*