# Leadlight: Math Logic Puzzle

> Stained-glass number puzzles: fill every window by logic and let the light in.

Canonical page: [https://chrome-stats.com/d/com.machcode.leadlight](https://chrome-stats.com/d/com.machcode.leadlight)

## Overview

- **ID:** `com.machcode.leadlight`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Machcode apps
- **Category:** GAME\_PUZZLE
- **Downloads:** 4
- **Version:** 1.1.0
- **Last updated:** 2026-11-03
- **First published:** 2026-10-30
- **Publisher country:** PL
- **Size:** 22 MB
- **Data as of:** 2026-11-09
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.machcode.leadlight)
- **Website:** [https://machcode.dev/leadlight/](https://machcode.dev/leadlight/)
- **Privacy policy:** [https://machcode.dev/leadlight/privacy/](https://machcode.dev/leadlight/privacy/)

## Description

Fill the stained-glass window with digits, and watch the light pour through.<br><br>Leadlight is a calm arithmetic logic puzzle. Every row and every column holds each digit once. Thick lead lines split the window into cages, and the number in a cage&#39;s corner tells you how its digits combine: 12+ adds up to 12, 24× multiplies to 24, 2− is a difference, 3÷ a quotient. Find the only digits that fit, and when the window is complete, light passes through it pane by pane.<br><br>• 280 windows, each with exactly one solution you can reach by logic – never by guessing<br>• Four difficulties: Easy 4×4 and 5×5 with sums and differences, Medium and Hard up to 7×7 with all four operations, and Expert, where the operations are hidden and working them out is part of the puzzle<br>• Hints that teach: first where to look, then why, and only then the move<br>• Notes with auto-clear, unlimited undo, live warnings when a digit breaks a rule<br>• Every solved window gets its own name<br>• Glass taps and chimes, a short tutorial, best times per level<br>• No ads, no subscriptions, no account<br><br>All 40 Easy windows and the first 10 of Medium, Hard and Expert are free. The rest come in one-time packs of 35 windows, or all at once.

## Rankings

- #3,098,018 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.INTERNET`
- `android.permission.POST_NOTIFICATIONS`
- `android.permission.VIBRATE`
- `android.permission.WAKE_LOCK`
- `com.android.vending.BILLING`
- `com.android.vending.CHECK_LICENSE`
- `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE`
- `com.machcode.leadlight.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.machcode.leadlight)