# Gastroptim vs CoLo

The clearest difference is update cadence: Gastroptim at every 3 weeks against CoLo's every 4 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.

Gastroptim ships an update every 3 weeks, CoLo every 4 months. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Gastroptim | CoLo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Size | 34 MB | 48 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [IEROMED](https://appshunter.io/developer/1854207440) | [Anamorphik Studio](https://appshunter.io/developer/441920730) |

## What reviewers say

### Gastroptim

[App page](https://appshunter.io/ios/app/gastroptim/id6755495773)

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

**In-app purchases:** none


### CoLo

[App page](https://appshunter.io/ios/app/colo-id/id6760033362)

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

**In-app purchases:** none


## Frequently asked questions

### Is Gastroptim free?

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

### Is CoLo free?

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

### Do Gastroptim or CoLo have ads?

Neither Gastroptim nor CoLo shows ads.

### Which is updated more often, Gastroptim or CoLo?

Gastroptim ships an update every 3 weeks, and CoLo every 4 months. Most recently, Gastroptim was updated on October 12, 2026 and CoLo on October 24, 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.*