# Killer Sudoku - Bento — Cross Math · Brain Puzzle

> Killer Sudoku with cage-summing math puzzles, ad-free and subscription-free. (iPhone/iPad app by Claudiu Valentin Sararu.)

- Source: https://appshunter.io/ios/app/killer-sudoku-bento/id6766061657 (this page in markdown: same URL + `.md`)
- Developer: [Claudiu Valentin Sararu](https://appshunter.io/developer/1884891322)
- Category: Games, Education, Family, Puzzle
- Price: Free with in-app purchases
- Rating: 5.00/5 from 3 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 4 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Brazilian Portuguese, European Spanish
- Released: 2026-05-03
- Data updated: 2026-08-26
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/killer-sudoku-bento/id6766061657/reviews.md

## What is Killer Sudoku?

Killer Sudoku for people who hate ad-bloated puzzle apps.

Bento is a hand-curated Killer Sudoku game for iPhone and iPad. No ads. No subscription. No login. No tracking. Just puzzles, made for the bedside table.

WHAT'S KILLER SUDOKU?
It's the Sudoku you know - fill the 9×9 grid so every row, column, and 3×3 box has the digits 1–9 - with a twist: the grid is divided into colored "cages", and the digits inside each cage must add up to the cage's number (with no repeats). It plays like Sudoku crossed with a math puzzle, and once you've tried it, regular Sudoku starts to feel one-dimensional.

REGULAR SUDOKU
The classic game, no cages. Rows, columns and boxes, nothing else to keep in your head - the one you already know how to play, built with the same care as the rest of Bento.

100 HAND-CURATED PUZZLES
Every puzzle in Bento is generated and verified for a unique solution - no broken puzzles, no guesswork required. 20 Easy / 25 Medium / 25 Hard / 30 Expert across the adult catalogue. Plus a fresh daily puzzle every day, free forever.

KIDS MODE
A separate catalogue of 48 puzzles on smaller 4×4 and 6×6 grids - perfect for teaching the cage-summing mechanic to a young learner. Brighter colors, more forgiving scoring, more hints. Toggle on the home screen.

ONE-TIME UNLOCK
Bento Pro is a single in-app purchase - no recurring charges. You get every puzzle in adult and kids modes, every difficulty. Try the first 3 puzzles of every difficulty plus the daily puzzle for free, indefinitely. No coercive trial periods, no manipulative free-but-not-really tier.

DESIGNED FOR FOCUS
• Neobrutalist sticker UI - bold colors, satisfying tactile feel
• Classical-grid mode for purists who want plain white cells
• Strict mode (3-mistake game over) for players who want the tension
• Per-puzzle stars track your cleanest solves separately from your fastest
• Full undo history, smart hints, pencil notes
• Replay any solved puzzle; share your trophy card as a PNG
• Daily streak counter

PRIVACY-FIRST
Bento collects nothing. No account, no analytics SDK, no ad network, no server you talk to. Everything lives on your device. The only network call the app makes is to Apple's StoreKit when you tap "Unlock for Bento Pro" or "Restore Purchase."

WHO IT'S FOR
• Sudoku players bored of vanilla 9×9 and looking for the next twist
• Parents who want to teach their 6-year-old logic puzzles without screens of ads
• Anyone who's deleted a "free" Sudoku app after the third 30-second ad in five minutes

Privacy Policy: https://sararu.net/bento/privacy-policy.html
Terms of Use: https://sararu.net/bento/terms-of-use.html

## Key features

- Cage-summing math puzzles
- 100 hand-curated puzzles
- Kids mode for younger learners
- One-time unlock for all content
- Neobrutalist sticker UI
- Privacy-first design, no tracking

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Bento Pro | $5.99 | one-time |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/killer-sudoku-bento/id6766061657/reviews.md

### 5/5 — Time Killer but Great Brain Exercise

*2026-05-05*

The app has challenging puzzles, smooth controls, and just the right difficulty ramp. Eye-friendly sudoku app for anyone that is perfect for quick brain workouts and mental exercises. Highly recommend!

### 5/5 — Great take on Sudoku

*2026-05-04*

I play sudoku daily and came across this game. It’s like sudoku but on a more challenging level. The fact you need to do match alone with just lining up numbers adds so much more difficulty and forces me to really use my brain.

## Frequently asked questions about Killer Sudoku

### What is Killer Sudoku - Bento?

Killer Sudoku - Bento is a puzzle game for iPhone and iPad that combines traditional Sudoku with a cage-summing mechanic. Puzzles are hand-curated, and the app is designed to be ad-free and subscription-free.

### How does Killer Sudoku - Bento work?

In addition to filling the 9x9 grid with digits 1-9, players must ensure that the digits within colored 'cages' add up to the cage's specified number without repetition. It's a blend of Sudoku and math puzzles.

### Does Killer Sudoku - Bento have ads?

No, Killer Sudoku - Bento is designed to be ad-free. The developers explicitly state 'No ads' and emphasize a privacy-first approach with no tracking or ad networks.

### What are the different puzzle difficulties in Killer Sudoku - Bento?

The adult catalogue includes puzzles across Easy, Medium, Hard, and Expert difficulties, with 20, 25, 25, and 30 puzzles respectively. There is also a fresh daily puzzle available for free.

### Is there a mode for children in Killer Sudoku - Bento?

Yes, there is a Kids Mode featuring 48 puzzles on smaller 4x4 and 6x6 grids. This mode uses brighter colors, more forgiving scoring, and additional hints to help young learners.

### How do I unlock all the puzzles in Killer Sudoku - Bento?

All puzzles in both adult and kids modes are unlocked with a single one-time in-app purchase called 'Bento Pro'. This purchase provides access to every puzzle and difficulty level without recurring charges.

### What devices does Killer Sudoku - Bento support?

Killer Sudoku - Bento is available for iPhone and iPad. It has an age rating of 4+.

### How often is Killer Sudoku - Bento updated?

The latest version, 1.0.2, was released on May 7, 2026, indicating recent development activity. The app is designed to provide a consistent puzzle experience.

## Version history (last 4 releases)

### 1.0.3 — 2026-08-26

Bento now plays two games.

Regular Sudoku - the classic, cage-free puzzle - joins Killer Sudoku. Tap the tag under the Bento title on the home screen to flip between them.

It's a whole second game, not a display option: 100 new hand-built adult puzzles and 48 new kids puzzles across Easy, Medium, Hard and Expert, its own Daily Puzzle, its own stats and streak, and a calm blue theme so you always know which one you're in. Everything you already use in Killer - notes, hints, undo, favorites, the 1-5 star score - works exactly the same.

Adult and Kids each get both rulesets, so there are now four separate progress tracks and four Daily Puzzles. The Daily stays free forever, and the first three puzzles in every difficulty of every bank are free too.

Nothing you have already solved has moved, and no streak was reset.

New to Bento? The welcome tutorial has a new page introducing the two ways to play.

### 1.0.2 — 2026-05-07

Bento now speaks seven languages.

The whole game - menus, settings, the win screen, the rulebook - is available in English, Spanish, German, Italian, Portuguese (Brazil), French, and Japanese. The app picks your language automatically from your iOS preferences. Want to override it just for Bento? Settings → Display Language lists every locale we ship.

While we were at it, we added a brand-new rulebook in Settings → How to Play. Classic Sudoku rules, the cage twist, every gameplay tool, Daily Puzzle, Kids Mode, Strict Mode, Pro - all in one scrollable place. Skim it, search it, come back when you need a refresher.

### 1.0.1 — 2026-05-05

Smarter notes. When you commit a digit into a cell, matching pencil-marks in the same row, column, 3×3 box, and cage are erased automatically - one less thing to keep track of while solving. Mistakes don't trigger the cleanup, so a misclick won't wipe out your notes. Undo restores everything.

Resume any puzzle, anytime. Tapping a puzzle from the picker now picks up where you left off - even if you've opened the daily or another puzzle in between. Each in-progress puzzle keeps its own progress slot.

### 1.0 — 2026-05-04

No release notes.

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## More apps by Claudiu Valentin Sararu

- [Book Tracker & Log - Penny](https://appshunter.io/ios/app/book-tracker-and-log-penny/id6760545686)
- [Hush: Night Light & Candle](https://appshunter.io/ios/app/hush-night-light-and-candle/id6762447328)
- [Fine. -  Daily Demotivation](https://appshunter.io/ios/app/fine-daily-demotivation/id6764894862)
- [Runi - Word Search](https://appshunter.io/ios/app/runi-word-search/id6768324077)
- [Bearhug: Parent & Child Bond](https://appshunter.io/ios/app/bearhug-parent-and-child-bond/id6775536605)

All apps by Claudiu Valentin Sararu: https://appshunter.io/developer/1884891322

## Related topics

[killer sudoku](https://appshunter.io/ios/topics/killer-sudoku)

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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 2026-08-26.*