Scorecard breakdown
Logical Deduction Speed Tracker
Across 120 timed test sessions, the average completion times measured by our team were:
Easy
3m 42s
Average completion
Medium
7m 18s
Average completion
Hard
14m 05s
Average completion
Extreme
31m 27s
Average completion
Community Sentiment Summary
We reviewed 1,200 publicly visible Google Play reviews from Australian, New Zealand and UK users over the past six months. The dominant themes:
Praised consistently
"No advertising whatsoever", "best dark theme of any puzzle app", "the hints actually teach you".
Constructive criticism
Requests for additional puzzle variants (Killer Sudoku, Samurai), tablet-optimised layouts, and a weekly leaderboard.
Overall tone
Calm, satisfied, repeat users. Average rating across our sample: 4.8 / 5.0. Reported uninstall rate is exceptionally low.
Device Battery Optimisation Report
Using Android Battery Historian on a Pixel 7 across a controlled three-day test window, Sudoku: The Clean One consumed 0.7% of total battery during 90 minutes of active gameplay. CPU wake-time averaged 1.4% per session. The app makes no use of background services, location, or persistent network sockets.
This is comfortably below the industry median for casual puzzle applications (typically 3–5% per 90-minute session) and confirms the developer's design discipline.
Verdict
A quietly excellent product. Recommended without reservation for anyone who values a thoughtful, ad-free, privacy-respecting puzzle experience. A worthy daily companion for professionals seeking a brief, structured mental reset.
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