# GFZ vs Loop by Tertianum

The clearest difference is update cadence: Loop by Tertianum at fortnightly against GFZ's every 10 months. GFZ's advantage is iOS requirement (13.0 vs 17.0). 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.

GFZ ships an update every 10 months, Loop by Tertianum fortnightly. The most recent releases landed on September 18, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | GFZ | Loop by Tertianum |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Fortnightly** |
| Size | 13 MB | 84 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Link IT isi GmbH](https://appshunter.io/developer/1527560604) | [Tertianum AG](https://appshunter.io/developer/1676612751) |

## What reviewers say

### GFZ

[App page](https://appshunter.io/ios/app/gfz-app/id1628755568)

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

**In-app purchases:** none


### Loop by Tertianum

[App page](https://appshunter.io/ios/app/loop-by-tertianum/id6446200090)

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

**In-app purchases:** none


## Frequently asked questions

### Is GFZ free?

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

### Is Loop by Tertianum free?

Loop by Tertianum is free to download, with no in-app purchases.

### Do GFZ or Loop by Tertianum have ads?

Neither GFZ nor Loop by Tertianum shows ads.

### Which is updated more often, GFZ or Loop by Tertianum?

GFZ ships an update every 10 months, and Loop by Tertianum fortnightly. Most recently, GFZ was updated on September 18, 2026 and Loop by Tertianum on September 21, 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.*