# Osmosis Solitaire II vs Devil's Blackjack

The clearest difference is price: Devil's Blackjack at Free against Osmosis Solitaire II's $0.99. Devil's Blackjack also leads on update cadence (every 3 days vs every 4 months) and iOS requirement (14.0 vs 18.0). Osmosis Solitaire II's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

Devil's Blackjack is free to download; Osmosis Solitaire II costs $0.99 up front. Devil's Blackjack sells 1 one-off in-app purchase. Osmosis Solitaire II asks for nothing beyond the download.

Osmosis Solitaire II ships an update every 4 months, Devil's Blackjack every 3 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Osmosis Solitaire II | Devil's Blackjack |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/osmosis-solitaire-ii/id1620160609/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Paid | — |
| Size | 45 MB | 157 MB |
| Requires iOS | 18.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [David Ramer](https://appshunter.io/developer/1507673679) | [Matthias Isenmann](https://appshunter.io/developer/6773349432) |

## What reviewers say

### Osmosis Solitaire II

[App page](https://appshunter.io/ios/app/osmosis-solitaire-ii/id1620160609)

Experience a modern, ad-free solitaire game with a calming interface and intuitive gameplay. Build suit rails, unlock ranks, and enjoy smooth animations and gentle haptics. Perfect for quick breaks or relaxed evenings.

**Highlights:** Ad-free and offline play, Intuitive osmosis rule, Smooth animations and haptics, Clear move indicators, Game statistics tracking, Collectible weekday and surprise cards, Built-in share sheet

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

**In-app purchases:** none


### Devil's Blackjack

[App page](https://appshunter.io/ios/app/devils-blackjack/id6773350036)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Game | $2.99 | one-time |


## Frequently asked questions

### Is Osmosis Solitaire II free?

Osmosis Solitaire II costs $0.99, with no in-app purchases.

### Is Devil's Blackjack free?

Devil's Blackjack is free to download, with in-app purchases available.

### Do Osmosis Solitaire II or Devil's Blackjack have ads?

Neither Osmosis Solitaire II nor Devil's Blackjack shows ads.

### Which is updated more often, Osmosis Solitaire II or Devil's Blackjack?

Osmosis Solitaire II ships an update every 4 months, and Devil's Blackjack every 3 days. Most recently, Osmosis Solitaire II was updated on October 27, 2026 and Devil's Blackjack on October 24, 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.*