# Guriddo: Stradoku Number Game — Daily Sudoku-like logic puzzle

> Competitive Sudoku-like logic number puzzle with daily challenges. (iPhone/iPad app by Simon Schuster.)

- Source: https://appshunter.io/ios/app/guriddo-stradoku-number-game/id1574107139 (this page in markdown: same URL + `.md`)
- Developer: [Simon Schuster](https://appshunter.io/developer/1574107141)
- Category: Games, Entertainment, Board, Puzzle
- Price: Free with in-app purchases
- Rating: 4.80/5 from 46 App Store ratings · 25 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 77 MB
- Languages: American English, French (France), German (Germany), Hindi, Japanese, Korean, Brazilian Portuguese, Chinese (Simplified, China), Latin American Spanish, Chinese (Traditional, Taiwan)
- Released: 2021-07-03
- Data updated: 2026-08-23
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/guriddo-stradoku-number-game/id1574107139/reviews.md

## What is Guriddo?

Guriddo (グリッド, Japanese for grid) is a free and competitive Sudoku alternative with daily challenges. If you enjoy playing Numbrix, Kakuro or Kenken style like number puzzle and seek a new tricky challenge, then you should give Stradoku a try.

If you have never played Stradoku before, read this with caution:

Stradoku is a highly addictive logic-based number puzzle. Similar to Kenken or Kakuro you have a 9x9 grid that you need to fill with numbers from 1 to 9. To increase the difficulty, rows and columns are additionally limited through black fields. But see for yourself!

If you are new to Stradoku, don't worry - we prepared an easy beginner’s guide for you. And always keep in mind, we warned you about its highly addictive nature.


Guriddo offers you: 

- Everyday we release a new number puzzle (daily challenge)
- Track your solving time and compete against other players
- There are 5 different difficulties (easy to diabolical)
- Take a break from the daily challenges and select your own difficulty (coffee break)
- Packs with hand-selected puzzles (e.g. for beginners)
- Guide with solving strategies
- Profile with stats about your skill level & progress
- Add your friends and play with them together

Privacy policy: https://guriddo.app/legal/privacy
Terms of use: https://guriddo.app/legal/tos

## Key features

- Daily number puzzles
- Competitive time tracking
- 5 difficulty levels
- Customizable 'coffee break' puzzles
- Puzzle packs for beginners
- Solving strategy guide
- Player profiles and stats
- Friend challenges

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Supporter (Annual Free trial) | $9.99 | per year |
| Supporter (Weekly) | $0.79 | per 7 days |
| Supporter (Annual) | $14.99 | per year |
| Supporter (Monthly) | $2.49 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Advanced Pack 2 | $2.49 | one-time |
| Advanced Pack 6 | $2.49 | one-time |
| Genius Pack 6 | $3.49 | one-time |
| Expert Pack 6 | $2.49 | one-time |
| Beginner Pack 10 | $0.99 | one-time |
| Advanced Pack 7 | $2.49 | one-time |
| Expert Pack 7 | $2.49 | one-time |
| Genius Pack 7 | $3.49 | one-time |
| Beginner Pack 11 | $0.99 | one-time |
| Advanced Pack 8 | $2.49 | one-time |
| Expert Pack 8 | $2.49 | one-time |
| Genius Pack 8 | $3.49 | one-time |
| Genius Pack 3 | $3.49 | one-time |
| Expert Pack 3 | $2.49 | one-time |
| Genius Pack 2 | $3.49 | one-time |
| Expert Pack 2 | $2.49 | one-time |
| Beginner Pack 9 | $0.99 | one-time |
| Beginner Pack 8 | $0.99 | one-time |
| Beginner Pack 6 | $0.99 | one-time |
| Beginner Pack 7 | $0.99 | one-time |


## Recent user reviews (10 of 25)

All indexed reviews: https://appshunter.io/ios/app/guriddo-stradoku-number-game/id1574107139/reviews.md

### 5/5 — Beautiful app

*2026-08-04*

Beautifully designed and also very comfortable user interface! I love it!

### 5/5 — tolles spiel

*2026-06-25*

obwohl ich nie besser bin als 20% aller spieler, startet es täglich meine gehirnzellen. dass man nie verzweifeln muss, sondern sich bei bedarf seine fehler zeigen lassen kann, ist das entscheidende plus.

**Developer response:** Hallo, freut mich riesig, dass Guriddo täglich deine Gehirnzellen anwirft 🤗 Und ja, genau dafür ist der Check da: lieber sich kurz den Fehler zeigen lassen, als frustriert aufzugeben. Danke fürs Spielen!

### 4/5 — Tolle App, aber

*2026-03-24*

Ich liebe diese App, allerdings scheitere ich regelmäßig an der X-Wing Strategie. Ich fände die App perfekt, wenn diese einem anhand dem aktuellen Rätsel erklärt wird und nicht anhand irgendeines leichteren Beispiels.

### 5/5 — 💜 Challenging & fun

*2025-08-30*

I love this game and the other games from this developer. That being said, this is my favorite because there is always logic behind every decision and there’s a sense of gratification whenever you complete a puzzle (even the easy ones!).

### 2/5 — Gute App, aber

*2025-08-21*

Ich habe das Spiel echte gerne gespielt, bis zu einem gewissen Grad war dies auch möglich. Aber jetzt geht es quasi garnicht mehr ohne irgendeine Abo-Andreherei. Schade.

**Developer response:** Hey Jeff, schade dass dir Guriddo keinen Spaß mehr macht. Was genau meinst du mit "Abo-Andreherei"? Am Bezahlmodell der App hat sich seit Jahren nichts verändert :/

### 1/5 — I don’t understand it…

*2025-04-17*

I read the tutorial several times and I still don’t understand how the game works. 
I think that the tutorial should be reworked. 
I’m surprised that a company like Simon & Schuster would put their name on a product that has so many grammatical errors.

**Developer response:** Oh nooo, the tutorial should enlighten, not baffle! 😅 Guriddo is actually a solo project—just me, my laptop, and too much coffee. No Simon & Schuster behind the curtain. I’m sorry the tutorial didn’t click for you—maybe you can give me as a non-native speaker some feedback where you saw grammatical errors. Thanks for the honest feedback! ❤️✌️

### 5/5 — chill game without adds

*2025-01-03*

chill game without adds

### 4/5 — Prinzipiell sehr gut

*2024-11-25*

Toll wäre noch, wenn man den Schwierigkeitsgrad selbst wählen dürfte. Ansonsten TOP

**Developer response:** Huhu, bei den Tee- & Pack-Spielen kannst du doch jederzeit deine Schwierigkeit selber auswählen oder verstehe ich dich falsch?

### 5/5 — App ist super

*2024-10-01*

Wer solche Zahlen-Puzzle mag, findet mit dieser App ein tolles Spiel und viele Herausforderungen. Obwohl ich schon mehrere Jahre das Spiel kenne (mit dem Namen Str8its) hat mich das Spiel auf ein neues Niveau gebracht. Die Genie-Spiele sind echt schwierig. Da muss man selbst als geübter Spieler mehr als 1 Stunde einplanen. Der Fokus auf das Zeitspiel bei den täglichen Puzzles finde ich nicht so gut. Darunter leidet aus meiner Sicht der Spaß. Auch die Farbwahl könnte besser individualisierbar sein. Ich erkenne z.B. die als sicher markierten Hilfszahlen sehr schlecht oder gar nicht. 
Sonst ist aber alles gelungen. Was ich noch vermissen würde, wäre ein Forum, wo man sich über Spielstrategien austauschen kann. Ich habe zum Beispiel den Lösungsansatz Zeilen-Spalten-zählen nicht verstanden und würde mich gerne mit anderen Spielern dazu austauschen. Gibt es ein Forum für diesen Zweck? Vg Winfried

**Developer response:** Hallo Winfried, freut mich zu hören, dass du dein Können dank Guriddo verbessern konntest :)

Hast du gesehen, dass es in den Einstellung von Guriddo die Option "Kontrast erhöhen" gibt? Wenn du die Option aktivierst solltest du hoffentlich die Hilfszahlen etwas besser erkennen können.

### 5/5 — Absorbing and challenging

*2024-06-19*

Love this game, always a mental challenge, great to keep the grey matter working. Paid for the app - well worth it for the hours of entertainment. Love having the variety of different daily levels and tough weekly game. Thank you for a clean, clutter-free app - now fully part of my daily routine.

## Frequently asked questions about Guriddo

### What is Guriddo: Stradoku Number Game?

Guriddo is a free, logic-based number puzzle game that serves as a competitive alternative to Sudoku. It features a 9x9 grid to be filled with numbers 1-9, with added complexity from black fields limiting rows and columns. It's designed to offer a tricky daily challenge for puzzle enthusiasts.

### What are the key features of this puzzle game?

The game offers a new daily puzzle challenge, allows players to track their solving time and compete with others, and provides five different difficulty levels from easy to diabolical. You can also select custom puzzles for a 'coffee break' and access packs of hand-selected puzzles, including beginner options.

### Is Guriddo free to play?

Yes, Guriddo is a free-to-play game. However, it does offer in-app purchases and contains advertisements. This allows for a free experience while providing options for enhanced features or an ad-free environment.

### Who is this game suitable for?

This game is ideal for players who enjoy logic-based number puzzles such as Sudoku, Numbrix, Kakuro, or Kenken. It's designed for those seeking a new, addictive challenge and enjoy tracking their progress and competing with others.

### How does Stradoku differ from Sudoku?

While both are grid-based number puzzles, Stradoku introduces black fields that further limit rows and columns, adding an extra layer of complexity beyond standard Sudoku rules. It also emphasizes daily challenges and competitive time tracking.

## Version history (last 5 releases)

### 1.18.5 — 2026-08-11

Update: Some contrast and font size optimizations.

### 1.18.4 — 2026-08-10

- New Feature: Added a vibration toggle in Settings to control the cell-tap haptic feedback.
- Update: Wrong digits now sit on colored chips for easier spotting, and entered numbers stand apart from the puzzle's given numbers again.
- Problem solved: Fixed readability of milestones/win screens on dark themes, chart bars on light themes, and text truncation in bottom sheets.

### 1.18.3 — 2026-08-08

- New Feature: Added a vibration toggle in Settings to control the cell-tap haptic feedback.
- Update: Wrong digits now sit on colored chips for easier spotting, and entered numbers stand apart from the puzzle's given numbers again.
- Problem solved: Fixed readability of milestones/win screens on dark themes, chart bars on light themes, and text truncation in bottom sheets.

### 1.18.0 — 2026-08-08

- New Feature: Added a marker system to highlight notes and fields.
- Update: Some color optimizations.

### 1.16.3 — 2026-04-30

Problem solved: Home page crashed for different localizations (thanks Gintaras for reporting).

## Apps similar to Guriddo

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sudoku.com - Number Games](https://appshunter.io/ios/app/sudokucom-number-games/id1193508329) | 4.8 (1,845,608) | Free | Games |
| [Just Sudoku - Classic puzzles](https://appshunter.io/ios/app/just-sudoku-classic-puzzles/id6443924309) | 3.1 (7) | Free | Games |
| [Japsum](https://appshunter.io/ios/app/japsum/id6740917658) | — | Free | Games |
| [RiddleSum - Math Puzzle](https://appshunter.io/ios/app/riddlesum-math-puzzle/id6474078443) | 4.6 (10) | Free | Games |
| [Coldoku](https://appshunter.io/ios/app/coldoku/id6479543662) | — | Free | Games |
| [Sudoku - Numbers Logic Puzzles](https://appshunter.io/ios/app/sudoku-numbers-logic-puzzles/id1658811239) | 4.8 (13) | Free | Games |

## More apps by Simon Schuster

- [Star Battle Hoshi Puzzles](https://appshunter.io/ios/app/star-battle-hoshi-puzzles/id1663477610)
- [Wortknoten: Worträtsel & Logik](https://appshunter.io/ios/app/wortknoten-wortratsel-and-logik/id6463155157)
- [Akari: Light Up Your Brain](https://appshunter.io/ios/app/akari-light-up-your-brain/id6503335592)
- [Skyscrapers Daily Puzzle Tawa](https://appshunter.io/ios/app/skyscrapers-daily-puzzle-tawa/id6667121815)
- [Rumba: Daily Binairo+ Puzzle](https://appshunter.io/ios/app/rumba-daily-binairo-plus-puzzle/id6740433202)

All apps by Simon Schuster: https://appshunter.io/developer/1574107141

## Related topics

[kakuro u](https://appshunter.io/ios/topics/kakuro-u)

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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 2026-08-23.*