# Castos vs Sartorius Events

The clearest difference is update cadence: Castos at every 2 months against Sartorius Events's every 13 months. Sartorius Events's advantage is iOS requirement (11.0 vs 15.6). 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.

Castos ships an update every 2 months, Sartorius Events every 13 months. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Castos | Sartorius Events |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (43 ratings)](https://appshunter.io/ios/app/castos/id1555924824/reviews)** | — |
| Number of ratings | **43** | — |
| Positive reviews | 24.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 13 months |
| Monetization | Free | — |
| Size | 50 MB | 48 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Castos](https://appshunter.io/developer/1555924826) | [Sartorius AG](https://appshunter.io/developer/583328085) |

## What reviewers say

### Castos

[App page](https://appshunter.io/ios/app/castos/id1555924824)

Access all your invited private podcasts in one unified app. Stream company updates, course content, or community information without managing multiple RSS feeds. Enjoy a secure, streamlined listening experience with easy login and playback controls.

**Highlights:** Unified private podcast access, Magic Link login, Customizable playback speed, Skip forward/backward controls, View episode show notes, Streaming only (no downloads)

**Features:** Vision Pro support

**In-app purchases:** none


### Sartorius Events

[App page](https://appshunter.io/ios/app/sartorius-events/id6469146818)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Castos free?

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

### Is Sartorius Events free?

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

### Do Castos or Sartorius Events have ads?

Neither Castos nor Sartorius Events shows ads.

### Which is updated more often, Castos or Sartorius Events?

Castos ships an update every 2 months, and Sartorius Events every 13 months. Most recently, Castos was updated on November 3, 2026 and Sartorius Events on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*