# Zero21 Solitaire — Fun Numbers Game > Numbers game to collect cards, keeping sum between 0 and 21. (iPhone/iPad app by Rollic Games Oyun Yazilim ve Pazarlama Anonim Sirketi.) - Source: https://appshunter.io/ios/app/zero21-solitaire/id1448993473 (this page in markdown: same URL + `.md`) - Developer: [Rollic Games Oyun Yazilim ve Pazarlama Anonim Sirketi](https://appshunter.io/developer/1452111779) - Category: Games, Board, Card - Price: Free with in-app purchases - Rating: 4.50/5 from 32,702 App Store ratings · 237 written reviews indexed - Age rating: 12+ - Requires: iOS 10.0 · 385 MB - Languages: American English - Released: 2019-01-27 - Data updated: 2026-06-10 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/zero21-solitaire/id1448993473/reviews.md ## What is Zero21 Solitaire? Zero21 is a challenging game with a simple rule: Try to stay between 0 and 21. It's not easy! Zero21 Solitaire is a fun numbers game with solitaire flavor to relax and unwind while keeping your mind sharp. Collect all the number cards on the board while keeping your sum between 0 and 21. Enjoy! ## Key features - Sum between 0 and 21 rule - Collect number cards - Solitaire flavor - Relaxing gameplay - Mind sharpening ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Remove Ads | $2.99 | one-time | ## What do users think of Zero21 Solitaire? Overall sentiment: negative **Pros** - 👍 Enjoyable gameplay - 💡 Challenging brain teasers - 🚀 Smooth performance **Cons** - 🔥 Excessive ads - ⏱️ Ads interrupt gameplay - 🔒 Unclear use of in-game currency **Commonly reported bugs** - Impossible level generation - Freezing issues - Inconsistent ad behavior **Most requested features** - Restart option within levels - Difficulty progression - Ability to purchase power-ups ## Recent user reviews (10 of 237) All indexed reviews: https://appshunter.io/ios/app/zero21-solitaire/id1448993473/reviews.md ### 5/5 — A fun game *2024-12-15, version 2.37* It’s a card game called ‘Zero21 Solitaire’ it’s a fun game. I play with my dad. ### 5/5 — Recomendación *2023-03-31, version 2.37* Los anuncios son DEMASIADOS, aburre tener que estar viendo para poder seguir jugando, y eso en lo particular prefiero salir del juego y ya no continuar jugando. ### 2/5 — Too many ads *2022-11-26, version 2.37* It’s a fun game but the ads are literally so ridiculous that I deleted the game. No matter if you choose “ad for 5X the diamonds” or not…. You still have to watch an ad. It’s so annoying. ### 2/5 — Excessive ads *2022-09-07, version 2.37* I wanted to like this game. I’ve seen the ads for it. But I started playing … played one game 15 seconds had a long ad. Came back played another game had a long ad. I don’t think this would be fun in the long-term to watch all these ads more than playing the game. ### 1/5 — Mismatch between developers *2022-09-06* I downloaded this game thinking it would be okay because it was by Zynga games, but this doesn’t feel like a Zynga game. It feels like a Playrix game instead. The amount of ads doesn’t match the number of ads in the Harry Potter match-3 game by this developer, which has ads but not very many. It matches the amount of ads in the Playrix game Pull the Pin which has ads after every round and in order to claim anything gained through progress. Please reduce the amount of ads in this game to a level similar to the level of ads in your other games. ### 2/5 — Ads and Freezing up *2022-09-02, version 2.37* I love the game but having ads every level that one can not get out of and the ad causing the game to freeze up(banner ads) just does not interest me into purchasing an ad free game because I would be afraid it would still have ads and freezing up. Another game that will be deleted, it is a shame. ### 5/5 — Love it *2022-08-26, version 2.37* But ran out of puzzles 😔 ### 4/5 — Fun *2022-08-18, version 2.37* Pretty fun I shall now recite a poem. Roses are red violets are green I like this game. It’s better than beans ### 1/5 — Cryptomining *2022-08-12, version 2.37* My battery is great. each round isn’t very long (and there is an ad) i got from 5% to 3% from 2 rounds. I uninstalled it and i have been making this for a round and it’s not going down. Really good, so i am really disappointed. ### 1/5 — Ads after every round *2022-08-12, version 2.37* I’ll complete a level in less than a minute then An ad, I’ll patiently wait and then go through the process of clicking through all the phases of the ad till next round, then I’ll play my second round complete that in no time, then another very tedious and long ad. Not a fan, However, the game is good idea and I like the style of the game. It’s just you can’t even play the game cause of ever add lurking behind every corner. ## Frequently asked questions about Zero21 Solitaire ### What is Zero21 Solitaire? Zero21 Solitaire is a numbers game with a solitaire twist. The primary objective is to collect all the number cards presented on the board while ensuring your running total sum stays within the range of 0 to 21. ### How do I play Zero21 Solitaire? You play by collecting number cards from the board. The challenge lies in managing your cumulative sum, which must always remain between 0 and 21 inclusive. Exceeding this range means you lose. ### Is Zero21 Solitaire free to play? Yes, the game is free to download and play. It does include in-app purchases and advertisements. ### What kind of device can I play Zero21 Solitaire on? This is a mobile application, designed to be played on smartphones and tablets. Specific compatibility details would typically be found on the app store page for your device. ### Who is Zero21 Solitaire for? This game is ideal for individuals who enjoy puzzle games, number-based challenges, or casual card games. It's designed to be relaxing while also providing a mental workout. ## Version history (last 5 releases) ### 2.37 — 2022-03-08 Performance improvements ### 2.33 — 2021-05-22 Performance improvements ### 2.32 — 2021-05-14 Performance improvements ### 2.31 — 2021-05-01 - Performance improvements - Thanks for playing! ### 2.30 — 2021-04-02 - Performance improvements - Thanks for playing! ## Apps similar to Zero21 Solitaire | App | Rating | Price | Category | | --- | --- | --- | --- | | [Solitaire.com: Classic Cards](https://appshunter.io/ios/app/solitairecom-classic-cards/id1191435163) | 4.7 (856,455) | Free | Games | | [Solitaire Cruise Tripeaks Game](https://appshunter.io/ios/app/solitaire-cruise-tripeaks-game/id1500251668) | 4.7 (138,765) | Free | Games | | [▻ Solitaire](https://appshunter.io/ios/app/solitaire/id500963785) | 4.7 (195,654) | Free | Games | | [Solitaire Classic Puzzle Game](https://appshunter.io/ios/app/solitaire-classic-puzzle-game/id1471592644) | 4.7 (119,631) | Free | Games | | [Spider Solitaire ・2026](https://appshunter.io/ios/app/spider-solitaire-2026/id1021946968) | 4.8 (64,920) | Free | Games | | [Solitaire Classic Games](https://appshunter.io/ios/app/solitaire-classic-games/id1277486668) | 4.7 (47,088) | Free | Games | ## More apps by Rollic Games Oyun Yazilim ve Pazarlama Anonim Sirketi - [Onnect – Pair Matching Puzzle](https://appshunter.io/ios/app/onnect-pair-matching-puzzle/id1387897651) - [Pixel Shot 3D](https://appshunter.io/ios/app/pixel-shot-3d/id1448697848) - [Dodgeball.io](https://appshunter.io/ios/app/dodgeballio/id1452111914) - [Picker 3D](https://appshunter.io/ios/app/picker-3d/id1462317543) - [Water Shooty](https://appshunter.io/ios/app/water-shooty/id1470463729) All apps by Rollic Games Oyun Yazilim ve Pazarlama Anonim Sirketi: https://appshunter.io/developer/1452111779 --- *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 2026-06-10.*