# Solid Hollow

> Relaxing puzzle game with circle swapping mechanics and colorblind support. (iPhone/iPad app by WAN-SHENG CHEN.)

- Source: https://appshunter.io/ios/app/solid-hollow/id1091206647 (this page in markdown: same URL + `.md`)
- Developer: [WAN-SHENG CHEN](https://appshunter.io/developer/914253236)
- Category: Games, Entertainment, Action, Casual
- Price: Free
- Rating: 5.00/5 from 3 App Store ratings
- Age rating: 4+
- Requires: iOS 7.0 · 18 MB
- Languages: English
- Released: 2016-03-14
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/solid-hollow/id1091206647/reviews.md

## What is Solid Hollow?

This is a simple game. It's not hard but maybe not so easy.
You must relax and concentrate.
Tap to swap the top and bottom circle.
Solid collide with Solid.
Hollow collide with Hollow.

Sounds so easy?! 
Try it!

- Support Game Center Leaderboard
- Colorbind friendly game

## Key features

- Circle swapping mechanic
- Relaxing gameplay
- Challenging puzzles
- Colorblind friendly
- Game Center Leaderboard support


## Frequently asked questions about Solid Hollow

### What is the gameplay like in Solid Hollow?

Solid Hollow involves tapping the screen to swap the top and bottom circles. The objective is to make solid shapes collide with other solid shapes and hollow shapes with other hollow shapes. It's designed to be both relaxing and mentally engaging.

### Is Solid Hollow suitable for players with color vision deficiency?

Yes, Solid Hollow is designed to be colorblind friendly, ensuring that players with various forms of color vision deficiency can enjoy the game without difficulty.

### Does Solid Hollow have online multiplayer?

The provided information does not indicate online multiplayer functionality. However, it does support Game Center Leaderboards, allowing players to compete for high scores globally.

### What devices is Solid Hollow available on?

Solid Hollow is available for iPhone and iPod devices. It was released on March 14, 2016, and its latest version is 1.1, last updated on March 29, 2016.

### What is the age rating for Solid Hollow?

Solid Hollow has an age rating of 4+, making it suitable for young players and families.

### How often is Solid Hollow updated?

Solid Hollow was last updated on March 29, 2016, with version 1.1. The developer has not provided information on a regular update schedule.

### Does Solid Hollow contain advertisements?

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

### What is the user sentiment for Solid Hollow?

Based on the limited data, Solid Hollow has received a perfect 5.0-star rating from 3 reviews, suggesting a very positive user reception.

## Version history (last 2 releases)

### 1.1 — 2016-03-29

- Optimizations

### 1.0 — 2016-03-14

No release notes.

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## More apps by WAN-SHENG CHEN

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All apps by WAN-SHENG CHEN: https://appshunter.io/developer/914253236

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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 2026-06-10.*