既読 vs Cube Chess
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
既読
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『既読』は、スマートフォンの中に残されたチャット、写真、通話履歴、メモなどを調べながら真実を解き明かしていく心理ミステリーゲームです。 一つの違和感が、すべての真実を覆します。 あなたは情報を集め、矛盾を見つけ、自分だけの仮説を組み立てながら事件の真相へ近づいていきます。 「見えているもの」が真実とは限りません。
Cube Chess
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Chess that also grows upward. Cube Chess brings Raumschach — a 5x5x5, 125-square variant played on five stacked boards — to your phone. Pieces move forward, sideways, and up and down. The check you never saw coming arrives from below. That surprise is the whole game. ■ Prof. Mono teaches you An interactive tutorial covers everything from the rules to thinking in three dimensions. New to chess? Bad with spatial puzzles? You'll be fine. ■ The Challenge Tower — seven keepers Seven opponents with distinct personalities: the aggressor, the wall, the trickster. Climb one floor at a time through a story mode. ■ Get a little stronger every day Daily mate puzzles, a 12-step learning ladder, a three-strike Puzzle Rush, and forced-mate problems in two difficulty tiers. ■ A level that fits you Three AI strengths plus material handicaps, so your first win is never out of reach. ■ A quiet cosmos to think in Seven glass-and-starlight themes, unlocked as you play. Everything runs offline. No account, no connection required. Available in 12 languages. Test the depth of your reading in a quiet cosmos.
Screenshots
Verdict
The clearest difference is ads: 既読 at none against Cube Chess's shown. Cube Chess's advantage is update cadence (every 3 days vs monthly). On price, in-app purchases, 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. Neither carries in-app purchases, so what you see is what you pay.
既読 ships an update monthly, Cube Chess every 3 days. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.
| Parameter | 既読 | Cube Chess |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 3 MB | 73 MB |
| Age rating | 12+ | 4+ |
| Developer | HIDEKI TAMAI | Kamineko |
In-app purchases
既読
No in-app purchases
Cube Chess
No in-app purchases









