# ISME Microbes vs URSI Events

The clearest difference is iOS requirement: ISME Microbes at 13.4 against URSI Events's 15.5. On price, update cadence, ads and in-app purchases there is nothing between them.

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

ISME Microbes ships an update every 5 months, URSI Events every 3 months. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | ISME Microbes | URSI Events |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Size | 82 MB | 115 MB |
| Requires iOS | **13.4** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [International Society for Microbial Ecology](https://appshunter.io/developer/1394492884) | [URSI Events](https://appshunter.io/developer/1691511477) |

## What reviewers say

### ISME Microbes

[App page](https://appshunter.io/ios/app/isme-microbes/id1394492885)

**Features:** macOS Compatibility

**In-app purchases:** none


### URSI Events

[App page](https://appshunter.io/ios/app/ursi-events/id6450006359)

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

**In-app purchases:** none


## Frequently asked questions

### Is ISME Microbes free?

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

### Is URSI Events free?

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

### Do ISME Microbes or URSI Events have ads?

Neither ISME Microbes nor URSI Events shows ads.

### Which is updated more often, ISME Microbes or URSI Events?

ISME Microbes ships an update every 5 months, and URSI Events every 3 months. Most recently, ISME Microbes was updated on November 6, 2026 and URSI Events on November 7, 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.*