# CosmoMerge vs Sapling Isle

The clearest difference is in-app purchases: Sapling Isle at none against CosmoMerge's 1. CosmoMerge's advantage is update cadence (every 2 days vs fortnightly) and iOS requirement (15.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. CosmoMerge sells 1 one-off in-app purchase. Sapling Isle asks for nothing beyond the download.

CosmoMerge ships an update every 2 days, Sapling Isle fortnightly. The most recent releases landed on November 5, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | CosmoMerge | Sapling Isle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cosmomerge/id6760329769/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Fortnightly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 84 MB | 40 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Qingdao Chuyan Technology Co., Ltd](https://appshunter.io/developer/1450752232) | [大鹏 张](https://appshunter.io/developer/937718061) |

## What reviewers say

### CosmoMerge

[App page](https://appshunter.io/ios/app/cosmomerge/id6760329769)

Explore astronomy, geography, and history by merging tiles. Unlock knowledge and discover new entries in your atlas with each level you achieve. Enjoy a puzzle experience that educates and entertains.

**Highlights:** Merge tiles to unlock knowledge, Explore Solar System, Geography, and History, Atlas with descriptive entries, Undo and Revive gameplay options, Ad-free experience with purchase

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### Sapling Isle

[App page](https://appshunter.io/ios/app/sapling-isle-physics-lab/id6792211746)

Explore physics and astronomy through interactive 3D experiments. Manipulate variables, observe system responses, and delve into underlying scientific concepts and equations. Offers multilingual support and adaptive layouts for iPhone and iPad.

**Highlights:** Interactive 3D physics experiments, 3D Solar System simulation, Black hole and light bending exploration, Microscopic world simulations, Multivariable comparisons and graphs, Exploration of equations and model limits, Multilingual interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CosmoMerge free?

CosmoMerge is free to download, with in-app purchases available.

### Is Sapling Isle free?

Sapling Isle is free to download, with no in-app purchases.

### Do CosmoMerge or Sapling Isle have ads?

Neither CosmoMerge nor Sapling Isle shows ads.

### Which is updated more often, CosmoMerge or Sapling Isle?

CosmoMerge ships an update every 2 days, and Sapling Isle fortnightly. Most recently, CosmoMerge was updated on November 5, 2026 and Sapling Isle on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*