Archived App (Last seen on 31 Oct 2026)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
Rating summary
About
HARDSUM is a fast, satisfying puzzle game that turns simple addition into a true test of logic.
Each challenge gives you a 3x3 grid. Every cell contains multiple number options, but only one choice in each cell leads to the correct solution. Your goal is to find the right combination so every row and column matches the target sum.
HARDSUM is easy to understand in seconds, but every puzzle pushes your focus, pattern recognition, and reasoning a little further.
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What's New in HARDSUM
1.0.6
September 13, 2026
small bug fixes.
