# OpenBioMaps Forms vs MusTerra

OpenBioMaps Forms and MusTerra are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 12, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | OpenBioMaps Forms | MusTerra |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Size | 45 MB | 138 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ECOLLAB](https://appshunter.io/developer/1777494456) | [MUST GmbH](https://appshunter.io/developer/1800343476) |

## What reviewers say

### OpenBioMaps Forms

[App page](https://appshunter.io/ios/app/openbiomaps-forms/id6737706732)

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

**In-app purchases:** none


### MusTerra

[App page](https://appshunter.io/ios/app/musterra/id6742859340)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OpenBioMaps Forms free?

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

### Is MusTerra free?

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

### Do OpenBioMaps Forms or MusTerra have ads?

Neither OpenBioMaps Forms nor MusTerra shows ads.

### Which is updated more often, OpenBioMaps Forms or MusTerra?

OpenBioMaps Forms ships an update weekly, and MusTerra weekly. Most recently, OpenBioMaps Forms was updated on September 12, 2026 and MusTerra on May 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.*