# Lumen Sudoku Killer & X — Jigsaw, diagonal, offline

> Jigsaw, diagonal, offline (iPhone/iPad app by Alexis Cassan.)

- Source: https://appshunter.io/ios/app/lumen-sudoku-killer-and-x/id6792155672 (this page in markdown: same URL + `.md`)
- Developer: [Alexis Cassan](https://appshunter.io/developer/1887068598)
- Category: Games, Board, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 28 MB
- Languages: American English
- Released: 2026-07-21
- Data updated: 2026-09-07
- User reviews in markdown: https://appshunter.io/ios/app/lumen-sudoku-killer-and-x/id6792155672/reviews.md

## What is Lumen Sudoku Killer & X?

Five sudoku games in one free app, fully playable offline: Classic, Killer, Sudoku X (both
diagonals), Jigsaw (irregular regions) and Odd/Even. 1250 levels in total, 250 per variant, plus a
fresh daily grid every morning.

FIVE VARIANTS, ONE GAME
• Classic: rows, columns and 3×3 blocks.
• Killer: sum cages with few given digits, for players who love the math.
• Sudoku X: both main diagonals must also contain 1-9.
• Jigsaw: the 3×3 blocks give way to nine irregularly shaped regions.
• Odd/Even: marked cells only accept odd or even digits.

Each variant has its own 250-level ladder, its own accent colour and a one-page "How to play"
primer.

1250 LEVELS, A CAREFULLY TUNED CURVE
Every grid is generated and checked to have a single unique solution, with difficulty rising
smoothly from level 1 to level 250. A global level tracks every win across all five games and moves
you up the ranks, from Novice to Grand Master.

DAILY CHALLENGE
One grid a day, the same for everyone, playable even offline. A monthly calendar keeps track of
your wins and feeds your daily streak.

100% OFFLINE
No connection needed to play. No account, no sign-up form, no server. Your progress never leaves
your device. The app is available in 10 languages.

FREE, WITH ADS ONLY IF YOU CHOOSE
Two free games a day, on top of the daily challenge, which is always included. Need one more game
or a hint? A short rewarded ad, only if you choose to watch one. No banners, no ads interrupting
your game.

LUMEN UNLIMITED (optional)
Unlimited games, zero ads, 3 hints per game. One-time purchase, 3.99, yours forever, no
subscription.

ACHIEVEMENTS AND LEADERBOARDS
Sign in silently to Game Center to unlock 15 achievements and climb 6 leaderboards, one global and
one per variant. No sign-up required; the app stays fully playable offline if you would rather
skip it.

A logic and number puzzle, no wifi needed, from your very first sudoku to expert level.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lumen Unlimited | $3.99 | one-time |



## Version history (last 3 releases)

### 1.0.2 — 2026-08-26

A new icon, and the store listing finally says what the game holds: Killer, Sudoku X, Jigsaw and Odd/Even. A rating prompt now appears after your first completed grid.

### 1.0.1 — 2026-07-27

Minor improvements and optimizations.

### 1.0 — 2026-07-22

No release notes.

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## More apps by Alexis Cassan

- [BadmintonPeak](https://appshunter.io/ios/app/badmintonpeak/id6760965000)
- [Smash Dynasty: Badminton](https://appshunter.io/ios/app/smash-dynasty-badminton/id6778991175)
- [Lumi: Picross Tale](https://appshunter.io/ios/app/lumi-picross-tale/id6782700410)
- [Badminton Analyst](https://appshunter.io/ios/app/badminton-analyst/id6792478568)
- [BadmintonCoach: Ask a Coach](https://appshunter.io/ios/app/badmintoncoach-ask-a-coach/id6793031970)

All apps by Alexis Cassan: https://appshunter.io/developer/1887068598

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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 2026-09-07.*