# Sous vs Castrum

The clearest difference is review sentiment: Sous at 90% against Castrum's 41%. Sous also leads on rating (5.0 vs 3.0) and iOS requirement (13.0 vs 18.0). Castrum's advantage is update cadence (every 2 months vs every 10 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Sous holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 90% of Sous's written reviews are positive against 41% of Castrum's.

Sous ships an update every 10 months, Castrum every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Sous | Castrum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sous-marin-flore/id1005045890/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/castrum/id1465245349/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | **90.0% of reviews** | 40.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 278 MB | 1.4 GB |
| Requires iOS | **13.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Furet Company](https://appshunter.io/developer/371295941) | [DEPARTEMENT DE L AUDE](https://appshunter.io/developer/1465245348) |

## What reviewers say

### Sous

[App page](https://appshunter.io/ios/app/sous-marin-flore/id1005045890)

Embark on a secret agent mission through a historic submarine. This free game offers two engaging treasure hunts designed for different age groups, allowing families to explore a museum and learn about the Cold War in a fun, interactive way.

**Highlights:** Secret agent missions, Two age-specific treasure hunts, Explore a historic submarine and museum, Cold War historical theme, Interactive gameplay, Family-friendly activity

**Features:** Vision Pro support

**In-app purchases:** none


### Castrum

[App page](https://appshunter.io/ios/app/castrum/id1465245349)

Develop a fortified village in 13th-century Occitania to defend against crusaders and aid pursued Cathars. Explore Cathar Country, collect items, and craft resources to preserve local culture. Engage in mini-games at historical monuments for unique rewards.

**Highlights:** Develop a fortified village, Collect and craft items, Explore Cathar Country, Geotagged mini-games at monuments, Historical narrative, Unlock legendary tools

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sous free?

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

### Is Castrum free?

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

### Which has better reviews, Sous or Castrum?

Sous is rated higher. Sous averages 5.0 out of 5 from 1 ratings, while Castrum averages 3.0 from 1 ratings.

### Do Sous or Castrum have ads?

Neither Sous nor Castrum shows ads.

### Which is updated more often, Sous or Castrum?

Sous ships an update every 10 months, and Castrum every 2 months. Most recently, Sous was updated on November 1, 2026 and Castrum 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.*