# Just Number Blocks vs Tectonic Star

The clearest difference is in-app purchases: Tectonic Star at none against Just Number Blocks's 1. Tectonic Star also leads on iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Just Number Blocks sells 1 one-off in-app purchase. Tectonic Star asks for nothing beyond the download.

## The numbers

| Metric | Just Number Blocks | Tectonic Star |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Fortnightly |
| Size | 1 MB | 22 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Two Intelligences, Inc.](https://appshunter.io/developer/1815997014) | [Bas Spijkerman](https://appshunter.io/developer/6792361856) |

## What reviewers say

### Just Number Blocks

[App page](https://appshunter.io/ios/app/just-number-blocks/id6775282762)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Just Number Blocks Pro | $0.99 | one-time |


### Tectonic Star

[App page](https://appshunter.io/ios/app/tectonic-star/id6792361854)

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

**In-app purchases:** none


## Frequently asked questions

### Is Just Number Blocks free?

Just Number Blocks is free to download, with in-app purchases available.

### Is Tectonic Star free?

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

### Do Just Number Blocks or Tectonic Star have ads?

Neither Just Number Blocks nor Tectonic Star shows ads.

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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.*