# NUMBER TRAILS vs Zero Grid

The clearest difference is in-app purchases: NUMBER TRAILS at none against Zero Grid's 1. Zero Grid's advantage is iOS requirement (15.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Zero Grid sells 1 one-off in-app purchase. NUMBER TRAILS asks for nothing beyond the download.

## The numbers

| Metric | NUMBER TRAILS | Zero Grid |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | — |
| Size | 9 MB | 141 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SHOGO TAKAHASHI](https://appshunter.io/developer/1862331537) | [Yuki Tsuna](https://appshunter.io/developer/1868553519) |

## What reviewers say

### NUMBER TRAILS

[App page](https://appshunter.io/ios/app/number-trails/id6756686892)

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

**In-app purchases:** none


### Zero Grid

[App page](https://appshunter.io/ios/app/zero-grid/id6760925027)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is NUMBER TRAILS free?

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

### Is Zero Grid free?

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

### Do NUMBER TRAILS or Zero Grid have ads?

Both NUMBER TRAILS and Zero Grid show 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.*