eChess vs A Lunar Crisis
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
eChess
Learn and play chess in a fun, accessible way with interactive tutorials and engaging themes. Connect with friends for matches, complete with built-in video chat and special effects.
- Interactive tutorials for learning chess
- Customizable themes from the shop
- Connect and play with friends
- Built-in video chat with special effects
- Fun and easy learning approach
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Inside the eChess game you will explore some great features like learning how to play with the tutorials, getting new and exciting themes in the shop and easily connect and play with your friends. Have fun playing with the built in video-chat with special effects and more. What are you waiting for? Install the game and let the fun begin! eChess is fully packed with a lot of great chess-themes already – and much more to come. Install the game now and experience this new and fun world of eChess together with your friends and family. Enjoy! Chess can sometimes seem a little intimidating, maybe a bit too serious and hard to learn as well! Now just relax and learn chess in a new, easy and most importantly fun way with eChess tutorials. Learn basic rules and learn how the pieces move and use your new skills to play and have a lot of fun! Install the game now to start learning the beautiful game of chess.
A Lunar Crisis
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Can you survive where no one is coming to save you? Lunar Crisis puts you in command of four stranded astronauts, fighting against time, isolation, and failing systems. Your mission: repair a damaged ship on a dead moon—and get everyone home alive. This is more than a survival game. Lunar Crisis is a test of resourcefulness and pressure management, crafted to teach probabilistic thinking. Monitor, repair… or perish. Lunar Crisis is volume 2 of the Mental Model Minis Series.
Screenshots
Verdict
The clearest difference is in-app purchases: A Lunar Crisis at none against eChess's 4. A Lunar Crisis also leads on update cadence (every 8 days vs every 2 months). On price, ads, device support and iOS requirement 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. eChess sells 4 one-off in-app purchases. A Lunar Crisis asks for nothing beyond the download.
eChess ships an update every 2 months, A Lunar Crisis every 8 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | eChess | A Lunar Crisis |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 2 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 619 MB | 88 MB |
| Age rating | 9+ | 4+ |
| Developer | eChess AS | Time Galleon Visual Novels |
In-app purchases
eChess
- 200 Coins$4.99
- 500 Coins$9.99
- 1000 Coins$16.99
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- 2000 Coins$29.99
A Lunar Crisis
No in-app purchases









