# AABB Events vs Controlled Release Society

The clearest difference is ratings volume: AABB Events at 232 against Controlled Release Society's 34. On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.8 for AABB Events against 4.8 for Controlled Release Society. That said, the two scores are not equally well evidenced: AABB Events has 232 ratings behind it against 34, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 11 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | AABB Events | Controlled Release Society |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (232 ratings)](https://appshunter.io/ios/app/aabb-events/id1479409158/reviews) | **[4.8 (34 ratings)](https://appshunter.io/ios/app/controlled-release-society/id1629109132/reviews)** |
| Number of ratings | **232** | 34 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | Every 11 months |
| Monetization | Free | Free |
| Size | 88 MB | 82 MB |
| Requires iOS | 15.5 | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [AMERICAN ASSOCIATION OF BLOOD BANKS, INC.](https://appshunter.io/developer/1479409157) | [Controlled Release Society, Inc](https://appshunter.io/developer/1484852690) |

## What reviewers say

### AABB Events

[App page](https://appshunter.io/ios/app/aabb-events/id1479409158)

Access data for annual or regional events, including presentations and exhibitor information. Connect with other attendees, take notes on slides, and draw directly on presentation materials.

**Highlights:** Access event presentations, View exhibitor information, Connect with attendees, Take notes on slides, Draw on presentation slides

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

**In-app purchases:** none


### Controlled Release Society

[App page](https://appshunter.io/ios/app/controlled-release-society/id1629109132)

Access presentations, presenter, and exhibitor details for select society meetings. Draw, highlight, and take notes directly on presentation slides, with all notes saved online for easy access.

**Highlights:** Browse presentations, View presenter details, Access exhibitor information, Draw and highlight on slides, Take notes on slides, Online note saving

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

**In-app purchases:** none


## Frequently asked questions

### Is AABB Events free?

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

### Is Controlled Release Society free?

Controlled Release Society is free to download, with no in-app purchases.

### Which has better reviews, AABB Events or Controlled Release Society?

Controlled Release Society is rated higher. AABB Events averages 4.8 out of 5 from 232 ratings, while Controlled Release Society averages 4.8 from 34 ratings.

### Do AABB Events or Controlled Release Society have ads?

Neither AABB Events nor Controlled Release Society shows ads.

### Which is updated more often, AABB Events or Controlled Release Society?

AABB Events ships an update every 11 months, and Controlled Release Society every 11 months. Most recently, AABB Events was updated on November 3, 2026 and Controlled Release Society on November 3, 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.*