100 Castles vs TourViewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
100 Castles
Explore medieval castles with this app. Discover historical accounts, listen to stories of kings and power, and view images of castle ruins and embankments.
- View castle images
- Read historical accounts
- Listen to stories
- Learn about kings and power
- Discover castle ruins
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Medieval castles still exist today as ruins and embankments and you are never very far away from your nearest castle site. Download the app and look at pictures, read historical accounts and listen to stories about castles, kings and power.
TourViewer
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Harness the full power of the ARtGlass TourBuilder suite. Deploy mind blowing augmented reality experiences to educate and entertain your audience. With more features than our streamlined WebApp, TourViewer is ready to serve your touring needs across industries. With TourViewer you can: - Immerse yourself in interactive videos, 3D models, and 360-degree panoramas. - Iterate instantly thanks to integrated publishing and updating - Implement extended features including image recognition, spatial tracking, beacons, group tours, and more - Adapt to varied environments thanks to support for online and offline usage, guided and self-guided tours, and compatibility across phones, tablets, and smartglasses - Serve diverse groups by implementing captions, subtitles, and voiceovers
Screenshots
Verdict
The clearest difference is update cadence: TourViewer at every 5 months against 100 Castles's every 34 months. 100 Castles's advantage is iOS requirement (8.0 vs 16.0). On price, ads, in-app purchases and device support 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.
100 Castles ships an update every 34 months, TourViewer every 5 months. The most recent releases landed on October 23, 2026 and October 4, 2026 respectively.
| Parameter | 100 Castles | TourViewer |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 34 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 5 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | NOUS Knowledge Management | ARtGlass USA LLC |
In-app purchases
100 Castles
No in-app purchases
TourViewer
No in-app purchases
Questions
Is 100 Castles free?
Is TourViewer free?
Do 100 Castles or TourViewer have ads?
Which is updated more often, 100 Castles or TourViewer?
Other comparisons
