# Werfen Events vs BSI events

The clearest difference is update cadence: BSI events at every 3 months against Werfen Events's every 8 months. Werfen Events's advantage is iOS requirement (15.6 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.

Werfen Events ships an update every 8 months, BSI events every 3 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Werfen Events | BSI events |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 months** |
| Size | 49 MB | 76 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Teknowledge Software](https://appshunter.io/developer/348684387) | [British Society for Immunology](https://appshunter.io/developer/1488970407) |

## What reviewers say

### Werfen Events

[App page](https://appshunter.io/ios/app/werfen-events/id1543373645)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### BSI events

[App page](https://appshunter.io/ios/app/bsi-events/id6736828986)

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

**In-app purchases:** none


## Frequently asked questions

### Is Werfen Events free?

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

### Is BSI events free?

BSI events is free to download, with no in-app purchases.

### Do Werfen Events or BSI events have ads?

Neither Werfen Events nor BSI events shows ads.

### Which is updated more often, Werfen Events or BSI events?

Werfen Events ships an update every 8 months, and BSI events every 3 months. Most recently, Werfen Events was updated on November 3, 2026 and BSI events on November 4, 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.*