# Stack by Stack! vs Cosmo Solitaire

The clearest difference is in-app purchases: Stack by Stack! at none against Cosmo Solitaire's 1. Stack by Stack! also leads on update cadence (every 4 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Cosmo Solitaire sells 1 one-off in-app purchase. Stack by Stack! asks for nothing beyond the download.

Stack by Stack! ships an update every 4 days, Cosmo Solitaire every 3 weeks. The most recent releases landed on September 27, 2026 and August 29, 2026 respectively.

## The numbers

| Metric | Stack by Stack! | Cosmo Solitaire |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Size | 94 MB | 49 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ByeongUk Choi](https://appshunter.io/developer/1872002178) | [DriveCode LLC](https://appshunter.io/developer/1889526644) |

## What reviewers say

### Stack by Stack!

[App page](https://appshunter.io/ios/app/stack-by-stack/id6760553499)

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

**In-app purchases:** none


### Cosmo Solitaire

[App page](https://appshunter.io/ios/app/cosmo-solitaire-card-game/id6780222675)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cosmo Mode Premium | $2.99 | one-time |


## Frequently asked questions

### Is Stack by Stack! free?

Stack by Stack! is free to download, with no in-app purchases.

### Is Cosmo Solitaire free?

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

### Do Stack by Stack! or Cosmo Solitaire have ads?

Both Stack by Stack! and Cosmo Solitaire show ads.

### Which is updated more often, Stack by Stack! or Cosmo Solitaire?

Stack by Stack! ships an update every 4 days, and Cosmo Solitaire every 3 weeks. Most recently, Stack by Stack! was updated on September 27, 2026 and Cosmo Solitaire on August 29, 2026.

---

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