Apps by Justin Carter
Pencilmark Sudoku app icon

Games

Pencilmark Sudoku

Justin Carter

Free No in-app purchases
Open on Apple

About this app

Pencilmark Sudoku is a focused Sudoku app for players who like solving with notes, patterns, and logic. Start with classic puzzles, use outer and inner pencil marks, select multiple cells at once, and work through hints that explain the next logical step. Beginner boards emphasize simple scanning and Schneider pairs, while practice puzzles help you sharpen specific techniques. Features: - Classic Sudoku puzzles by difficulty - Fast pencil-mark entry - Multi-select for marking related cells - Smart hints with step-by-step logic - Practice mode for solving techniques - Auto-checking and conflict highlights - Portrait and landscape layouts - Local progress and stats saved on device No accounts, ads, tracking, or daily streak pressure. Just Sudoku, notes, hints, and practice.

Latest release

What’s New

Version 1.2 Aug 14, 2026

- Added a technique explainer index and linked technique guidance from Quick Start. - Refined the How to Play instructions and explainer layouts. - Added responsive explainer boards and kept pencil marks inside their cells. - Added the final-number single-mark shortcut guidance. - Fixed the delay after regular taps while supporting the single-mark shortcut. - Formatted messy code

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
0 ratings
0 Sep 11, 2026 · 0 ratings Sep 11, 2026

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current Free
Historical low Free
Paid → free 0×
Price history
Current Free
Free Sep 11, 2026 · Free Sep 11, 2026

First snapshot captured. The trend line starts after the next crawler price observation.

  1. First observed Sep 11, 2026 · 2:39 PM Free

Screenshots

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