# sand pile model — chain reaction game

> Chain reaction puzzle game focused on maximizing score with minimal taps. (iPhone/iPad app by Yasuyoshi Ota.)

- Source: https://appshunter.io/ios/app/sand-pile-model/id1455579700 (this page in markdown: same URL + `.md`)
- Developer: [Yasuyoshi Ota](https://appshunter.io/developer/1500357652)
- Category: Games, Health & Fitness, Puzzle, Strategy
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 12.0 · 8 MB
- Languages: English, Japanese
- Released: 2019-04-05
- Data updated: 2026-07-07
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/sand-pile-model/id1455579700/reviews.md

## What is sand pile model?

The longer the chain reaction, the more score values will be added.
Make chain reaction huge with as little power (number of taps) as possible. That is the strategy to raise the score.

If you clear all the cells, the stage clears and you move on to the next stage.
As the stage goes up, the difficulty goes up a little.

The power will be added automatically when the stage clears.
The power can also be increased by looking at the CM.

Play is easy. The guide will be displayed at the first start, so please refer to it.


● cell
The cell shows numbers or '*'.
The main operation of play is to tap this cell.
When you tap a cell, numbers increase or '*' disappears and stars are emitted up, down, left and right.

You can change the display of cells from numbers to shapes.

● power
Power means the number of times you can tap a cell.
When power is low, the cell's area frame turns orange or red to indicate that.
When the power goes to zero, the game is over.

● stage
When all the cells disappear, the stage is clear.
When you clear the stage, power is added and you move on to the next stage.

● score
When the number displayed in a cell increases or the cell disappears, the score is added.
The score to be added varies according to the length of the chain reaction and the number of stage.
The longer the chain reaction, the higher the score to be added.
The higher the number of stage, the higher the score to be added.

● power up
You can increase the power by watching CM.

------------
The app name ‘sand pile model’ is derived from the mathematical model ‘sand pile model’.

## Key features

- Chain reaction scoring
- Tap-based gameplay
- Stage progression
- Power management
- Score multipliers
- Cell display customization


## Frequently asked questions about sand pile model

### How do you play sand pile model?

The game involves tapping cells to create chain reactions. The objective is to achieve a high score by making the longest chain reactions possible with the fewest taps. Clearing all cells on a stage advances you to the next level.

### What is the goal in sand pile model?

The primary goal is to achieve the highest possible score by strategically creating chain reactions. This is done by using the limited 'power' (number of taps) as efficiently as possible to clear stages.

### Can I play sand pile model offline?

The provided data does not specify offline play capabilities. However, many casual puzzle games can be played without an internet connection.

### How does the difficulty increase in sand pile model?

The difficulty increases gradually as you progress through stages. This means that later stages will require more strategic thinking and efficient use of your power to clear.

### Does sand pile model have ads?

Yes, sand pile model contains advertisements. You can also increase your power by watching CM (commercials).

### What devices is sand pile model available on?

Sand Pile Model is available on iPhone, iPad, and iPod devices.

### How often is sand pile model updated?

The latest version, 1.1.2, was released on February 21, 2024. This indicates that the game receives periodic updates.

### What is the age rating for sand pile model?

Sand Pile Model has an age rating of 4+, making it suitable for young players and families.

## Version history (last 4 releases)

### 1.1.2 — 2024-02-21

performance improvement

### 1.1.1 — 2023-06-18

performance improvements

### 1.1 — 2022-03-28

Performance Improvement    
Simplified power increase procedure

### 1.0 — 2019-04-05

No release notes.

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## More apps by Yasuyoshi Ota

- [Kinetic Visual Acuity](https://appshunter.io/ios/app/kinetic-visual-acuity/id315045189)
- [Kinetic Visual Acuity Lite](https://appshunter.io/ios/app/kinetic-visual-acuity-lite/id319026009)
- [Amida Mikan](https://appshunter.io/ios/app/amida-mikan/id350563115)
- [Try Hairstyle Lite](https://appshunter.io/ios/app/try-hairstyle-lite/id350729683)
- [Amida Mikann](https://appshunter.io/ios/app/amida-mikann/id358691639)
- [2 Digit Multiplication](https://appshunter.io/ios/app/2-digit-multiplication/id395133470)

All apps by Yasuyoshi Ota: https://appshunter.io/developer/1500357652

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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 2026-07-07.*