# Events by E&I vs PrevenTRON IM

The clearest difference is update cadence: PrevenTRON IM at every 6 weeks against Events by E&I's every 4 months. Events by E&I's advantage is iOS requirement (15.1 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.

Events by E&I ships an update every 4 months, PrevenTRON IM every 6 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Events by E&I | PrevenTRON IM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Size | 56 MB | 63 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Educational & Institutional Cooperative Service, Inc.](https://appshunter.io/developer/1813919551) | [Q2Q](https://appshunter.io/developer/1380299858) |

## What reviewers say

### Events by E&I

[App page](https://appshunter.io/ios/app/events-by-e-and-i/id6745794532)

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

**In-app purchases:** none


### PrevenTRON IM

[App page](https://appshunter.io/ios/app/preventron-im/id6786364544)

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

**In-app purchases:** none


## Frequently asked questions

### Is Events by E&I free?

Events by E&I is free to download, with no in-app purchases.

### Is PrevenTRON IM free?

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

### Do Events by E&I or PrevenTRON IM have ads?

Neither Events by E&I nor PrevenTRON IM shows ads.

### Which is updated more often, Events by E&I or PrevenTRON IM?

Events by E&I ships an update every 4 months, and PrevenTRON IM every 6 weeks. Most recently, Events by E&I was updated on October 24, 2026 and PrevenTRON IM on October 25, 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.*