# FusionMonster — 【Merge&Idle Game】

> Idle fantasy monster synthesis and auto-battle RPG for casual play. (iPhone/iPad app by TATSUHIKO YAMAMOTO.)

- Source: https://appshunter.io/ios/app/fusionmonster/id1619333386 (this page in markdown: same URL + `.md`)
- Developer: [TATSUHIKO YAMAMOTO](https://appshunter.io/developer/1619333388)
- Category: Games, Entertainment, Casual, Simulation
- Price: Free
- Rating: 4.13/5 from 8 App Store ratings
- Age rating: 12+
- Requires: iOS 12.0 · 234 MB
- Languages: English
- Released: 2022-04-15
- Data updated: 2026-06-04
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/fusionmonster/id1619333386/reviews.md

## What is FusionMonster?

Fusion Monster is a fantasy-style game application for smartphones in which monsters are synthesized, strengthened, and nurtured together.
It can be operated by holding it vertically in one hand, so it is recommended for those who want to play casually.

■About the battle of Fusion Monster
Combat is an auto-battle that progresses automatically.
It is also recommended for busy people because it progresses even if you leave it alone.

How to operate Fusion Monster

Create a monster
Tap the egg button to create a new monster.
The stronger the monster you synthesize, the stronger the monster that will be born from the egg.

Purchase monsters
Monsters can be purchased from the SHOP by spending coins.

Selling Monsters
Monsters can be sold by swiping the monster icon and moving it to the SHOP button.
When you have enough monsters and can no longer synthesize them, it is recommended to sell them.

Synthesizing Monsters
You can combine monsters by swiping the same monster icon on top of each other.

Gift Boxes
Rarely, a gift box appears where monsters can be obtained.
The red boxes are for strong monsters that can be obtained by watching advertisements.

Recommended for this type of person.
People who like light games that are easy to play.
Like fantasy games
Like cute monsters
Like leave-it-and-forget games
Like clicker games

## Key features

- Monster synthesis and nurturing
- Auto-battle combat
- Idle progression
- Vertical one-handed operation
- Monster creation and purchasing
- Monster selling for coins
- Gift boxes with rare monsters


## Frequently asked questions about FusionMonster

### What is FusionMonster?

FusionMonster is a fantasy-style idle RPG where players synthesize, strengthen, and nurture monsters. It features auto-battle combat and can be played casually with one hand.

### How do I get new monsters in FusionMonster?

You can create new monsters by tapping the egg button, purchase them from the SHOP using coins, or sometimes obtain them from gift boxes that appear.

### Can I play FusionMonster offline?

The provided description does not specify offline play capabilities. However, idle games often function well with intermittent connectivity.

### Does FusionMonster have ads?

Yes, FusionMonster contains advertisements. Red gift boxes, for example, offer strong monsters that can be obtained by watching advertisements.

### What is the gameplay loop in FusionMonster?

Players create and acquire monsters, then synthesize identical monsters to create stronger ones. Battles are auto-battled, and monsters can be sold for coins when no longer needed.

### Is FusionMonster suitable for busy people?

Yes, FusionMonster is recommended for busy people as combat is auto-battle and progresses even when the game is left alone, fitting the 'leave-it-and-forget-it' game style.

### What devices does FusionMonster support?

FusionMonster supports iPhones, iPads, and iPods, indicating it is available on iOS devices.

### How often is FusionMonster updated?

The latest version is 3.2, and the app was last updated on March 9, 2023. This suggests regular updates, though the exact frequency is not detailed.

## Version history (last 5 releases)

### 3.2 — 2023-03-09

System update.

### 3.1 — 2023-03-08

System update.

### 3.0 — 2023-02-07

Monsters added.

### 2.5 — 2022-04-30

fix system

### 2.4 — 2022-04-28

system update

## Apps similar to FusionMonster

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [放置ドラゴン -癒しxRPGの育成ゲーム-](https://appshunter.io/ios/app/xrpg/id6473820155) | — | Free | Games |
| [Idle Demon King 2](https://appshunter.io/ios/app/idle-demon-king-2/id1498884562) | 5.0 (22) | Free | Games |
| [Idle Monster RPG: Hack & Slash](https://appshunter.io/ios/app/idle-monster-rpg-hack-and-slash/id6502508459) | — | Free | Games |
| [Reincarnation Monster Clicker](https://appshunter.io/ios/app/reincarnation-monster-clicker/id6739491748) | 4.5 (4) | Free | Games |
| [Lost World - 失われた世界 -](https://appshunter.io/ios/app/lost-world/id1561718512) | 4.0 (40) | Free | Games |
| [Idle Demon King](https://appshunter.io/ios/app/idle-demon-king/id1354897884) | 4.2 (12) | Free | Games |

## More apps by TATSUHIKO YAMAMOTO

- [SapphireSword](https://appshunter.io/ios/app/sapphiresword/id1642319146)

All apps by TATSUHIKO YAMAMOTO: https://appshunter.io/developer/1619333388

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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 2026-06-04.*