# Pencilmark Sudoku — Notes, hints & practice

> Notes, hints & practice (iPhone/iPad app by Justin Carter.)

- Source: https://appshunter.io/ios/app/pencilmark-sudoku/id6763785157 (this page in markdown: same URL + `.md`)
- Developer: [Justin Carter](https://appshunter.io/developer/1589174732)
- Category: Games, Casual, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 18.6 · 24 MB
- Languages: American English
- Released: 2026-06-03
- Data updated: 2026-08-19
- User reviews in markdown: https://appshunter.io/ios/app/pencilmark-sudoku/id6763785157/reviews.md

## What is Pencilmark Sudoku?

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.


## Version history (last 3 releases)

### 1.2 — 2026-08-14

- 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

### 1.1 — 2026-08-11

- Statistics overview and per-difficulty results
  - Personal bests, split by hint usage
  - Fastest-time celebration
  - Double-tap a cell with exactly one inner pencil mark to enter that number

### 1.0 — 2026-06-03

No release notes.

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## More apps by Justin Carter

- [Animated Hearts Stickers](https://appshunter.io/ios/app/animated-hearts-stickers/id1589174730)
- [PieSlicer](https://appshunter.io/ios/app/pieslicer/id6738563011)

All apps by Justin Carter: https://appshunter.io/developer/1589174732

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-19.*