# Geobristol vs TopoGML

The clearest difference is update cadence: TopoGML at every 4 days against Geobristol's every 3 months. 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.

Geobristol ships an update every 3 months, TopoGML every 4 days. The most recent releases landed on October 7, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Geobristol | TopoGML |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Size | 63 MB | 6 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [EOS DATA ANALYTICS, INC.](https://appshunter.io/developer/1474361531) | [Andres Sanchez Del Toro](https://appshunter.io/developer/6780533814) |

## What reviewers say

### Geobristol

[App page](https://appshunter.io/ios/app/geobristol/id1672887151)

**In-app purchases:** none


### TopoGML

[App page](https://appshunter.io/ios/app/topogml/id6780533811)

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

**In-app purchases:** none


## Frequently asked questions

### Is Geobristol free?

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

### Is TopoGML free?

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

### Do Geobristol or TopoGML have ads?

Neither Geobristol nor TopoGML shows ads.

### Which is updated more often, Geobristol or TopoGML?

Geobristol ships an update every 3 months, and TopoGML every 4 days. Most recently, Geobristol was updated on October 7, 2026 and TopoGML on October 17, 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.*