# SUDOKU Happy GRG

> SUDOKU Happy GRG (iPhone/iPad app by Ground Road Technology, LLC.)

- Source: https://appshunter.io/ios/app/sudoku-happy-grg/id6474723781 (this page in markdown: same URL + `.md`)
- Developer: [Ground Road Technology, LLC](https://appshunter.io/developer/509799010)
- Category: Games
- Price: Free
- Age rating: 17+
- Requires: iOS 12.0 · 140 MB
- Languages: English, French, German, Japanese, Korean, Portuguese, Spanish
- Released: 2024-01-04
- Data updated: 2026-02-13
- User reviews in markdown: https://appshunter.io/ios/app/sudoku-happy-grg/id6474723781/reviews.md

## What is SUDOKU Happy GRG?

puzzle similar to Sudoku where you uniquely match plants and animals.

Since it involves aligning plants and animals instead of numbers, the puzzle is slightly more challenging than regular Sudoku. It's recommended for cognitive brain training!

+ Basic rules.
Fill in the empty cells to make each item unique vertically.
and
Fill in the empty cells to make each item unique horizontally.
and
In the case of 9x9, Fill in the empty cells within the 3x3 groups to make each item unique.
In the case of 6x6, Fill in the empty cells within the 2x3 groups to make each item unique.
In the case of 4x4, Fill in the empty cells within the 2x2 groups to make each item unique.

- Game Level
Level 1 . Hints of candidate items from 1 to 4 will be displayed.
Level 2 . Hints of candidate items from 2 to 4 will be displayed.
Level 3 . Hints of candidate items from 3 to 4 will be displayed.
The number of initially filled cells and the difficulty level increase based on the selected level.

- Game Pattern
9x9 / 6x6 / 3x3

- There are a total of 160,000 game patterns, and the items (plants and animals) used change every time, providing endless enjoyment!

- Get Happy Items / Happy Score
You can obtain new items upon clearing the puzzle for the first time.
You can earn Happy Score up to three times per day for completing one stage.
You can obtain new items with the Happy Score you've earned!
There are over 50 Happy Items available.

- Puzzle like Number Place / SUDOKU
It's a puzzle a little different from Number Place / Sudoku. Highly recommended for daily brain training!


## Version history (last 1 release)

### 1.0.2 — 2024-01-16

multiple language descriptions.

## More apps by Ground Road Technology, LLC

- [Zoo Stepper \| step on tiles](https://appshunter.io/ios/app/zoo-stepper-step-on-tiles/id1099139985)
- [nohiku 脳トレひき算](https://appshunter.io/ios/app/nohiku/id1544934523)
- [nokake 脳トレかけ算](https://appshunter.io/ios/app/nokake/id1546879095)
- [nowaru 脳トレわり算](https://appshunter.io/ios/app/nowaru/id1546879890)
- [九九 かけ算九九、聞いて選んで覚えよう](https://appshunter.io/ios/app/id1564702553)
- [Tactics GRG](https://appshunter.io/ios/app/tactics-grg/id6455886632)

All apps by Ground Road Technology, LLC: https://appshunter.io/developer/509799010

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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 2026-02-13.*