Comparison

Osmosis Solitaire II vs Devil's Blackjack

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Osmosis Solitaire II

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
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Relax into a modern, ad-free take on a classic patience game. Osmosis Solitaire II keeps things calm and focused: a felt-green table, silky animations, gentle haptics, and clear rules that click the moment you start playing. How to Play Build each of the 4 suit rails from Ace → King. The left rail establishes which ranks are “unlocked.” Rails 2–4 may only accept a rank that already appears in the rail to their left (that’s the “osmosis” rule). Tap the Stock to deal (3-up to Discard); drag the top Reserve or the top of Discard onto a valid rail slot. Start a fresh layout anytime with Deal. Features Ad-free, offline play — no interruptions, no tracking. Beautiful layout tuned for iPhone & iPad (including Pro/Max & mini). Responsive feel with smooth animations and subtle haptics. Smart snapping & clear placeholders make legal moves obvious. Stats you care about: total games played, wins, and losses. Weekday winner cards: earn a special card the first time you win on each day of the week. Surprise cards: extra collectible badges for special calendar wins (e.g., Halloween, Christmas, 4th of July, etc.). Two rotating slots keep your most recent surprises. Share your vibe: built-in share sheet to show friends what you’re playing. Why You’ll Love It Osmosis Solitaire II strips away clutter so you can unwind. It’s quick to learn, satisfying to master, and always respectful of your time—perfect for a coffee break or a quiet evening session. Ready to play your next calm, winning hand?

About

Devil's Blackjack

Features
Read full description

Play the first circle of hell for free. Unlock the full game with a one-time purchase to continue cheating the devil. Devil’s Blackjack is a roguelike blackjack deckbuilder where cheating is the only way to escape from hell. Play as Vane Brimstone — gambler, con artist, and professional liar — trapped in hell after finally cheating the wrong people. To escape eternal damnation, Vane challenges the devil himself to a blackjack tournament across the 9 circles of hell. There’s only one problem: the devil makes the rules. Manipulate your deck, forge illegal cards, rig probabilities, collect cursed Jokers, and rewrite the rules of blackjack itself. Every run becomes a dangerous battle of greed, bluffing, and strategic cheating. FEATURES • Roguelike blackjack gameplay. Classic blackjack transformed into a strategic deckbuilding roguelike. • Cheat to survive! Swap cards, manipulate draws, palm hidden cards, swipe bad hands, and pressure the devil into mistakes. • Build devastating decks! Buy new cards, forge illegal modifiers, burn weak cards, and create broken synergies. • Unique Joker cards! Collect powerful Jokers with special abilities, personalities, and game-changing effects. • Infernal rule system. Every stage introduces new devil rules that twist blackjack into dangerous new forms. • Multiple devils and playstyles. Battle through the 9 circles of hell against opponents with unique decks, personalities, and cheating styles. Good gamblers play cards. Great gamblers cheat.

Screenshots

Osmosis Solitaire II4 screens
Devil's Blackjack4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
Osmosis Solitaire II versus Devil's Blackjack: the parameters behind the verdict, then further details
ParameterOsmosis Solitaire IIDevil's Blackjack
Price$0.99Free — better
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 4 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.014.0 — better
Further details — not scored
Size45 MB157 MB
Age rating4+12+
DeveloperDavid RamerMatthias Isenmann

In-app purchases

None

Osmosis Solitaire II

No in-app purchases

1 purchases

Devil's Blackjack

One-time1
  • Unlock Full Game$2.99

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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