Castrum vs FlashTheWorld
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Castrum
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.
- Develop a fortified village
- Collect and craft items
- Explore Cathar Country
- Geotagged mini-games at monuments
- Historical narrative
- Unlock legendary tools
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You are a faidit, a rebel Occitan lord from the 13th century. Develop your castrum - a fortified village - to face off the attacks of your adversaries, the crusaders and offer a refuge to the pursued Cathars. With the help of your faithful friends, cross Cathar Country in search of items that you will be able to combine in your WORKSHOP to save the Occitan culture from destruction. Castrum offers you: - A HISTORY mode, playable anywhere at any time, during which you collect items to develop your castrum. - A MONUMENT mode, playable only during your visit to the monuments of Aude, which lets you play geotagged mini games. You will need to visit 5 monuments to complete your quest. Over the course of the adventure, you will be able to: - Collect 54 items and craft close to 200 with them; - Go into your INVENTORY to discover the items to craft; - Win surprise rewards by visiting the 20 Cathar country monuments. During your visit, you must complete 5 mini games: if you succeed, you unlock a legendary tool which is added to your collection. Some examples of mini games: - Catapult game: destroy the fortresses by discovering their weak points - Flute Hero: play medieval melodies in time - Matching game: find the right combinations - Shooting game: eliminate your enemies via 360° immersion in the monuments - The source of sign language: learn to speak like the monks of the Middle Ages Castrum gives you the chance to immerse yourself in lavish settings by visiting the 20 Cathar country monuments off the beaten track, in the company of characters associated with the history of the Aude département. The 20 monuments of Cathar country: 10 CASTLES Aguilar castle Arques castle Montségur castle Peyrepertuse castle Puilaurens castle Quéribus castle Saissac castle Termes castle Villerouge-Termenès castle Lastours castle 7 ABBEYS Alet-les-Bains abbey Caunes-Minervois abbey Fontfroide abbey Lagrasse abbey Saint-Hilaire abbey Saint-Papoul abbey Villelongue abbey 2 MEDIEVAL SITES Castles and ramparts of the city of Carcassonne Medieval city of Fanjeaux 1 MUSEUM Quercorb museum Who are the Cathars? Appearing around the year 1000, Catharism was a dissident Christian religion, originating from the East, particularly influential around Toulouse, Carcassonne, Béziers and Albi. The region therefore became a refuge for the Cathars when the Church pursued them during the Albigensian crusade, all the way to the heights of Montségur. It is this saga that the castles of Cathar country recount.
FlashTheWorld
Turn cultural heritage into an exploration game. Scan real-world monuments with your camera to learn their history, earn points, and build your collection. Compete with others on interactive maps and leaderboards.
- Scan real monuments with AI identification
- Explore monuments on interactive maps
- Track progress and rankings
- Discover live flashes worldwide
- Build a monument collection
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FlashTheWorld turns heritage and culture into a real-world exploration game. Take photos of the monuments you encounter, let our AI identify them, discover their history, earn FlashPoints and climb the leaderboards! Every Flash adds to your collection and helps you progress. Explore cities and countries, complete challenges, unlock badges, and discover what players have found near you and around the world. Key features: - Flash: take a photo of a real monument and let our AI identify it. - Exploration: discover monuments, cities, countries, routes and collections. - Interactive map: find monuments to Flash, places you have already collected, arenas and controlled territories. - Teams: create your own team or join an official or community team. - Arenas: answer three questions correctly to conquer an arena for your team. - Territories: see which areas are controlled by each team and help expand their territory. - Leaderboards: compete against other explorers and the best teams. - Feed: follow Flashes shared around the world or near you. - Progression: collect monuments, earn badges and keep your Flash streak going. In short: - Rediscover your city or travel destination through play. - Learn the history behind the monuments around you. - Build your collection and complete routes. - Join a team and conquer territories. - Share your discoveries and compete with the community.
Screenshots
Verdict
The clearest difference is review sentiment: FlashTheWorld at 90% against Castrum's 41%. FlashTheWorld also leads on update cadence (every 3 days vs every 2 months) and iOS requirement (16.4 vs 18.0). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Castrum ships an update every 2 months, FlashTheWorld every 3 days. The most recent releases landed on October 8, 2026 and October 12, 2026 respectively.
| Parameter | Castrum | FlashTheWorld |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) — better | — |
| Positive reviews | 40.9% of reviews | 90.0% of reviews — better |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.0 | 16.4 — better |
| Further details — not scored | ||
| Size | 1.4 GB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | DEPARTEMENT DE L AUDE | Francois Mari |
Customer experience
Castrum
FlashTheWorld
In-app purchases
Castrum
No in-app purchases
FlashTheWorld
No in-app purchases
Questions
Is Castrum free?
Is FlashTheWorld free?
Do Castrum or FlashTheWorld have ads?
Which is updated more often, Castrum or FlashTheWorld?
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