InvaZium vs Board & Book
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
InvaZium
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The planet EKC-567 is being invaded by colorful meteorites, but Korn-67, a small alien, is determined to protect his planet from the invaders. You have to shoot the invading meteorites ready to destroy the planet of Korn-67.
Board & Book
This app combines chess with literary exploration, allowing users to delve into the history of the game through curated stories. It offers tactical training and various play modes, including online matches with friends.
- Chess history narratives
- Tactical training
- Play against computer
- Online play with friends
- Full library unlock
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Board & Book is a chess club for readers. Open a chapter of chess history and the board moves with the words. Morphy, the birth of modern play, and the stories that shaped the game, told with the patience of a good book. That is the heart of the club. Train when you want a sharper eye. Tactics that respect your time, not a feed that never ends. Play across the table, against the computer, or online with friends. Online play and friends are free. Unlock Everything is a single $4.99 purchase for the full library and premium craft. Online play and community remain free forever. A place to read the history of chess, train with care, and play with friends. Support: support@boardandbook.app
Screenshots
Verdict
The clearest difference is in-app purchases: InvaZium at none against Board & Book's 1. InvaZium also leads on device support (3 vs 1) and iOS requirement (12.0 vs 18.6). On price, update cadence and ads 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. Board & Book sells 1 one-off in-app purchase. InvaZium asks for nothing beyond the download.
InvaZium ships an update every 6 days, Board & Book every 3 days. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.
| Parameter | InvaZium | Board & Book |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 6 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 54 MB | 63 MB |
| Age rating | 4+ | 12+ |
| Developer | Daniel Canete Campos | ROBERT CHARLES KREHBIEL |
In-app purchases
InvaZium
No in-app purchases
Board & Book
- Board & Book Premium$4.99
