# TWENTRIS BOX

> A mental math puzzle game combining number selection and Tetris-like shapes. (iPhone/iPad app by David Herrera Solas.)

- Source: https://appshunter.io/ios/app/twentris-box/id621328557 (this page in markdown: same URL + `.md`)
- Developer: [David Herrera Solas](https://appshunter.io/developer/435741052)
- Category: Games, Puzzle
- Price: Free
- Rating: 4.00/5 from 1 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 11 MB
- Languages: American English
- Released: 2013-04-19
- Data updated: 2026-08-18
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/twentris-box/id621328557/reviews.md

## What is TWENTRIS BOX?

TWENTRIS = Twenty + Te + tris 
TWENTRIS is a Tetromino that adds 20. Like a Te-tris shape.
The game consists of selecting 4 numbers that add 20 and forming a Tetromino.
You have to find the 4 hidden TWENTRIS in the box.
The faster you find them more points you receive.
You have 100 seconds per Round and each game has 4 Rounds.
Be the fastest in search TWENTRIS and write your name in the World High Scores.
Twentris is like a Te-tris with numbers.
It is a mental math game, and it's free.
If you noticed the Twentris are within a square of Sudoku.
Twentris mixture Sudoku, Te-tris, Puzzle and Numbers with mathematics.
Twentris is a free arithmetic game for smart people with a quick mental calculation.
You can also search Twentris in your printed Sudokus, but not always are 4.
Enjoy this free game doing mental arithmetic.

## Key features

- Select four numbers that add to 20
- Form Tetromino shapes
- Find hidden TWENTRIS in a grid
- Timed rounds for high scores
- Mental math and arithmetic challenges
- Combines Sudoku, Tetris, and puzzle elements

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/twentris-box/id621328557/reviews.md

### 5/5 — Sencillo y adictivo

*2016-01-16, version 1.52*

No puedo para de intentar mejorar la puntuación.

### 5/5 — Gimnasia cerebral

*2015-03-23, version 1.52*

Buena para mantenerse en forms

### 5/5 — Rápido

*2013-12-21, version 1.52*

Rápidas partidas para demostrar tu visión matemática.

### 5/5 — Cálculo

*2013-04-20, version 1.0*

Buen juego para incentivar el cálculo en los niños

## Frequently asked questions about TWENTRIS BOX

### What is TWENTRIS BOX?

TWENTRIS BOX is a free arithmetic game that challenges players to find four hidden numbers that add up to 20. It blends elements of Tetris, Sudoku, and number puzzles for a mental calculation workout.

### How do you play TWENTRIS BOX?

The game involves selecting four numbers that sum to 20 and forming a Tetromino shape. You must locate the four hidden TWENTRIS within the box as quickly as possible to earn points.

### What is the objective of TWENTRIS BOX?

The main objective is to be the fastest player in finding the TWENTRIS and to write your name on the World High Scores. Each game consists of 4 rounds, with 100 seconds per round.

### Is TWENTRIS BOX suitable for all ages?

TWENTRIS BOX has an age rating of 4+, making it suitable for younger players and adults alike. It's designed as a mental arithmetic game for smart people with quick calculation skills.

### Does TWENTRIS BOX have ads?

No, TWENTRIS BOX does not contain advertisements. It is a completely free game with no in-app purchases or ads.

### What devices support TWENTRIS BOX?

TWENTRIS BOX is available on iPhone, iPad, and iPod. It was released on April 19, 2013, and its latest version is 1.65, last updated on July 14, 2017.

### Can I play TWENTRIS BOX offline?

The provided information does not specify if TWENTRIS BOX can be played offline. However, as a single-player puzzle game, it is likely to function without an internet connection.

### What is the user rating for TWENTRIS BOX?

TWENTRIS BOX has a rating of 4.0 stars from 1 rating. This indicates a generally positive reception from its limited user base.

## Version history (last 5 releases)

### 1.65 — 2017-07-14

This app has been updated by Apple to display the Apple Watch app icon.

Internal improvements of the program.

### 1.63 — 2017-07-05

Added app preview video to the App Store.

### 1.62 — 2017-06-27

Small improvements

### 1.61 — 2017-06-24

New languages added to the App Store

### 1.6 — 2017-06-23

New scores on Game Center.

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## More apps by David Herrera Solas

- [Reciclaje para Niños con Camiones](https://appshunter.io/ios/app/reciclaje-para-ninos-con-camiones/id570371646)
- [Touch the Ladybug](https://appshunter.io/ios/app/touch-the-ladybug/id680249935)
- [Bingo Pinball Dragon](https://appshunter.io/ios/app/bingo-pinball-dragon/id683746189)
- [Hide and Seek for Children](https://appshunter.io/ios/app/hide-and-seek-for-children/id789568301)
- [The game of Hide and Seek, free.](https://appshunter.io/ios/app/the-game-of-hide-and-seek-free/id800378403)

All apps by David Herrera Solas: https://appshunter.io/developer/435741052

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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 2026-08-18.*