# AC Forum vs BSIR 2026

The clearest difference is update cadence: BSIR 2026 at every 2 weeks against AC Forum's every 2 months. AC Forum's advantage is iOS requirement (15.5 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.

AC Forum ships an update every 2 months, BSIR 2026 every 2 weeks. The most recent releases landed on October 9, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | AC Forum | BSIR 2026 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 115 MB | 62 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [AC Forum](https://appshunter.io/developer/1654514738) | [CIRSE - Cardiovascular and Interventional Radiological Society of Europe](https://appshunter.io/developer/849682234) |

## What reviewers say

### AC Forum

[App page](https://appshunter.io/ios/app/ac-forum/id6444411958)

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

**In-app purchases:** none


### BSIR 2026

[App page](https://appshunter.io/ios/app/bsir-2026/id6809764522)

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

**In-app purchases:** none


## Frequently asked questions

### Is AC Forum free?

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

### Is BSIR 2026 free?

BSIR 2026 is free to download, with no in-app purchases.

### Do AC Forum or BSIR 2026 have ads?

Neither AC Forum nor BSIR 2026 shows ads.

### Which is updated more often, AC Forum or BSIR 2026?

AC Forum ships an update every 2 months, and BSIR 2026 every 2 weeks. Most recently, AC Forum was updated on October 9, 2026 and BSIR 2026 on October 5, 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.*