# 12 in 3 > Calculates number combinations for a given sum and digit count. (iPhone/iPad app by Frank-Peter Poschmann.) - Source: https://appshunter.io/ios/app/12-in-3/id478962594 (this page in markdown: same URL + `.md`) - Developer: [Frank-Peter Poschmann](https://appshunter.io/developer/400075879) - Category: Games, Entertainment, Puzzle - Price: Free - Rating: 5.00/5 from 1 App Store ratings · 8 written reviews indexed - Age rating: 4+ - Requires: iOS 14.0 · 2 MB - Languages: American English, Danish, French (France), German (Germany), Italian, European Spanish - Released: 2011-11-15 - Data updated: 2026-06-02 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/12-in-3/id478962594/reviews.md ## What is 12 in 3? “12 in 3” is a small helper app to determine the possible combinations of a given sum in a given number of digits. You may also exclude certain numbers from the list or make a number to be required. ## Key features - Calculate number combinations - Specify target sum - Define number of digits - Exclude numbers - Require specific numbers ## Recent user reviews (8 of 8) All indexed reviews: https://appshunter.io/ios/app/12-in-3/id478962594/reviews.md ### 5/5 — Brilliant little app *2022-05-05, version 3.0.2* I am a Killer Sudoku addict….this is the most useful helper I’ve ever seen. Does exactly what it says, and saves me time looking up combinations. Easy to use, quick, reliable - and no ads. Excellent! ### 5/5 — Amazing *2021-10-04* This app is perfect, exactly what I was looking for to aid me in solving kakuro puzzles. Thank you so much for creating such a straight forward app that does exactly what I need it to without any annoying ads. ### 5/5 — Killer sudoku toolbelt! *2014-03-31* I do killer sudoku puzzles frequently. Having the combination sums handy let's me focus on the puzzle. For the last couple of years, I have planned on building an app for that. When I sat down to start last week, my research led me to 12 in 3, which had EVERY element of my design. No reason to reinvent the wheel. Well done. Well done. ### 5/5 — Get out of Jail card *2013-06-07, version 1.3* Brilliant. I'm frequently bamboozled by the more complex combinations and this really helps - the get out of jail card, so to speak. Excellent app. ### 4/5 — Does what it should *2013-04-22, version 1.3* Does what it says in an easy to use way. Could do with the addition of a calculator though. Also would be nice to get combinations for 8 and 9. ### 4/5 — Cross off *2013-03-01* The only thing I would change is to have the ability to cross off the combinations that don't work ### 4/5 — Looks promising *2012-08-01* Don't know whether I'll use it but it looks fine; What do you mean by "Allow double" (no game allows That) ? ### 3/5 — Quite handy *2011-12-02, version 1.0* It would be much better if the sums went all the way up to 45 (not stopping at 39!) and the digits up to 9 (why stop at 6?). ## Frequently asked questions about 12 in 3 ### What is 12 in 3 used for? 12 in 3 is a helper app designed to find all possible combinations of numbers that add up to a specific sum, using a defined number of digits. It's useful for puzzles and mathematical challenges. ### Can I exclude numbers from the combinations in 12 in 3? Yes, 12 in 3 allows you to exclude certain numbers from the possible combinations. You can also specify numbers that must be included in the calculation. ### What devices does 12 in 3 support? 12 in 3 is available on Mac, iPhone, iPad, and iPod devices, offering flexibility for users across Apple's ecosystem. ### Is 12 in 3 free to use? Yes, 12 in 3 is completely free to download and use, with no in-app purchases or advertisements. ### What is the age rating for 12 in 3? 12 in 3 has an age rating of 4+, making it suitable for a wide range of users, including younger individuals interested in numbers. ### How often is 12 in 3 updated? The app was last updated on November 11, 2021, with version 3.0.2. It was initially released on November 15, 2011. ### Does 12 in 3 have ads? No, 12 in 3 is ad-free, providing an uninterrupted experience for users focused on solving number combination problems. ### What is the user rating for 12 in 3? 12 in 3 has a perfect rating of 5.0 stars based on one review, indicating a highly positive user experience. ## Version history (last 5 releases) ### 3.0.2 — 2021-11-11 Again, fixed a problem with the wheels on iOS 15.1. ### 3.0.1 — 2021-10-12 Fixed a problem with the selection wheels on iOS15 ### 3.0 — 2021-01-20 • A little bit polished user interface • Now also available on the Mac ### 2.2.1 — 2020-04-14 Fixed some problems with the dark mode of iOS ### 2.2 — 2020-04-11 Recompiled with the latest SDK and missing icon sizes added. ## Apps similar to 12 in 3 | App | Rating | Price | Category | | --- | --- | --- | --- | | [Multicross Puzzle Challenge](https://appshunter.io/ios/app/multicross-puzzle-challenge/id967910505) | 4.5 (167) | Free | Games | | [Thermometers - Logic Puzzle](https://appshunter.io/ios/app/thermometers-logic-puzzle/id6739959033) | 5.0 (3) | Free | Games | | [Number Hives Hex Logic Puzzles](https://appshunter.io/ios/app/number-hives-hex-logic-puzzles/id6743806143) | — | Free | Games | | [Sudoku⁹](https://appshunter.io/ios/app/sudoku/id6445941744) | 5.0 (2) | Free | Games | | [Sudoku Premium](https://appshunter.io/ios/app/sudoku-premium/id326973977) | 4.4 (57) | $5.99 | Games | | [Linked Circles](https://appshunter.io/ios/app/linked-circles/id6448780094) | — | Free | Games | ## More apps by Frank-Peter Poschmann - [VocalWarmUp](https://appshunter.io/ios/app/vocalwarmup/id1434841672) - [Empire_mobile](https://appshunter.io/ios/app/empire-mobile/id1465452819) - [Kauli](https://appshunter.io/ios/app/kauli/id1519180677) - [VocalWarmUp2](https://appshunter.io/ios/app/vocalwarmup2/id1535327703) - [Muvy](https://appshunter.io/ios/app/muvy/id1627245610) All apps by Frank-Peter Poschmann: https://appshunter.io/developer/400075879 --- *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 2026-06-02.*