Shadow Sum: Math Logic Puzzle is made and published by Crystl Labs. AppBrain is an independent app data site and isn't affiliated with Crystl Labs. The app name, icon, screenshots and description belong to Crystl Labs and are shown as published on Google Play.

About Shadow Sum: Math Logic Puzzle

Shadow Sum: Math Logic Puzzle is a puzzle app developed by Crystl Labs.

Install Statistics

Shadow Sum: Math Logic Puzzle has been installed 0 times. In the last 30 days, the app was installed 1 times.

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App Information

Shadow Sum: Math Logic Puzzle is freely available from Google Play. The app size is 81.66 MB. The latest version available is 1.0.0. The last update was on October 21, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on Google Play since October 2026.

Description by Crystl Labs (from Google Play)

The labels have faded. The totals remain. Step into a quiet archive and reconstruct the values of mysterious symbols by comparing rows, regions and diagonals.

Every deduction opens another door. Use candidate notes, worked tutorials and clean high-contrast themes to reason through 200 verified grids. A symbol keeps the same value across a board, so a single discovery can unlock several clues at once.

Restore the curator’s exhibition, explore daily difficulty tiers and track your personal progress. Use free undo and optional explanations of the next logical step.

Play at your own pace. Includes English, Spanish and Brazilian Portuguese. Contains ads, with optional video rewards. Internet access is needed for ads; the campaign is designed for offline play.

dev@crystllabs.com
https://crystllabs.com/privacy.html

Recent changes:
First release: 200 verified grids, worked tutorials, candidate notes, free undo and high-contrast themes.

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Screenshots

Shadow Sum: Math Logic Puzzle Screenshot 1 of 4

Shadow Sum: Math Logic Puzzle Screenshot 2 of 4

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Screenshots by Crystl Labs, from the Google Play listing

Official page on Google Play

Alternatives to Shadow Sum: Math Logic Puzzle

Changelog of Shadow Sum: Math Logic Puzzle

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Developer information for Crystl Labs

Crystl Labs

crystllabs@gmail.com

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Technologies used by Shadow Sum: Math Logic Puzzle

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Shadow Sum: Math Logic Puzzle