# Inkstone Sudoku

> Find the next deduction with thoughtful Sudoku puzzles and free teaching hints.

Canonical page: [https://chrome-stats.com/d/co.digitalsoftware.inkstone](https://chrome-stats.com/d/co.digitalsoftware.inkstone)

## Overview

- **ID:** `co.digitalsoftware.inkstone`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Digital Software Group
- **Category:** GAME\_PUZZLE
- **Downloads:** 3
- **Version:** 0.3.0
- **Last updated:** 2026-10-11
- **First published:** 2026-10-11
- **Publisher country:** OM
- **Size:** 103 MB
- **Data as of:** 2026-10-26
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=co.digitalsoftware.inkstone)
- **Website:** [https://digitalsoftware.co](https://digitalsoftware.co/)
- **Privacy policy:** [https://digitalsoftware.co/co.digitalsoftware.inkstone](https://digitalsoftware.co/co.digitalsoftware.inkstone)

## Description

One deduction at a time.<br><br>Inkstone brings Sudoku to a quiet paper-and-ink setting. Explore six Classic difficulty tiers, from a gentle Sprout puzzle to Fiendish chains and fish. Mini 6×6 and Diagonal boards offer a different rhythm.<br><br>Every bundled puzzle has one solution and a verified logical path. When you need a hand, free teaching hints name the technique, show the pattern and explain the next step. Practice nineteen techniques in short lessons.<br><br>Choose your helpers: pencil notes, color marks, automatic note removal, mistake checks and a timer you can hide. Undo and redo your entries, resume unfinished pages, or switch to a dark theme. Three daily puzzles and a calendar let you build a regular habit.<br><br>Keep progress with local saves and a backup code. No account is needed to play.<br><br>Advertisements never interrupt puzzles or lessons. Occasional ads may appear after completed puzzles. An optional one-time Remove Ads purchase can be restored through Google Play.<br><br>Features: 2,200 original puzzles; 57 practice positions; free hints; Mini and Diagonal variants; three daily difficulties; notes and paint; undo/redo; dark themes; portrait and landscape; statistics; sixteen local achievements.

## Rankings

- #3,260,882 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.AD_ID`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.READ_BASIC_PHONE_STATE`
- `android.permission.VIBRATE`
- `android.permission.WAKE_LOCK`
- `co.digitalsoftware.inkstone.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`
- `com.android.vending.BILLING`
- `com.android.vending.CHECK_LICENSE`
- `com.google.android.gms.permission.AD_ID`

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Source: [Chrome-Stats](https://chrome-stats.com/d/co.digitalsoftware.inkstone)