# CATALYST for Learning vs ACOI Events

The clearest difference is update cadence: ACOI Events at monthly against CATALYST for Learning's every 48 months. CATALYST for Learning's advantage is iOS requirement (10.0 vs 15.5). 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.

CATALYST for Learning ships an update every 48 months, ACOI Events monthly. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | CATALYST for Learning | ACOI Events |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (51 ratings)](https://appshunter.io/ios/app/acoi-events/id6692608799/reviews)** |
| Number of ratings | — | **51** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 48 months | **Monthly** |
| Monetization | — | Free |
| Size | 4 MB | 84 MB |
| Requires iOS | **10.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Internet Testing Systems (ITS)](https://appshunter.io/developer/546817214) | [American College of Osteopathic Internists](https://appshunter.io/developer/567593502) |

## What reviewers say

### CATALYST for Learning

[App page](https://appshunter.io/ios/app/catalyst-for-learning/id1469065092)

**In-app purchases:** none


### ACOI Events

[App page](https://appshunter.io/ios/app/acoi-events/id6692608799)

This app provides attendees of the ACOI Event with access to presentations, speaker information, and exhibitor details. Users can take notes directly on slides, draw on content, and communicate with other attendees via in-app messaging, tweeting, and emailing.

**Highlights:** View abstracts and presentations, Access speaker and exhibitor details, Take notes on presentation slides, Draw directly on slides, In-app messaging with attendees, Share information via tweet and email

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

**In-app purchases:** none


## Frequently asked questions

### Is CATALYST for Learning free?

CATALYST for Learning is free to download, with no in-app purchases.

### Is ACOI Events free?

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

### Do CATALYST for Learning or ACOI Events have ads?

Neither CATALYST for Learning nor ACOI Events shows ads.

### Which is updated more often, CATALYST for Learning or ACOI Events?

CATALYST for Learning ships an update every 48 months, and ACOI Events monthly. Most recently, CATALYST for Learning was updated on October 7, 2026 and ACOI Events on October 1, 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.*