# TerraTest App vs Instagrid APP

The clearest difference is update cadence: Instagrid APP at every 4 weeks against TerraTest App's every 3 months. TerraTest App's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TerraTest App ships an update every 3 months, Instagrid APP every 4 weeks. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | TerraTest App | Instagrid APP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Size | 35 MB | 118 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TERRATEST GmbH](https://appshunter.io/developer/1237536504) | [Instagrid](https://appshunter.io/developer/1656806715) |

## What reviewers say

### TerraTest App

[App page](https://appshunter.io/ios/app/terratest-app/id1237536505)

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

**In-app purchases:** none


### Instagrid APP

[App page](https://appshunter.io/ios/app/instagrid-app/id6444778719)

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

**In-app purchases:** none


## Frequently asked questions

### Is TerraTest App free?

TerraTest App is free to download, with no in-app purchases.

### Is Instagrid APP free?

Instagrid APP is free to download, with no in-app purchases.

### Do TerraTest App or Instagrid APP have ads?

Neither TerraTest App nor Instagrid APP shows ads.

### Which is updated more often, TerraTest App or Instagrid APP?

TerraTest App ships an update every 3 months, and Instagrid APP every 4 weeks. Most recently, TerraTest App was updated on October 6, 2026 and Instagrid APP on October 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*