# Day of Week Genius — Become A Human Calendar. > Mental math app to calculate the day of the week for any date. (iPhone/iPad app by ByteLaunch.) - Source: https://appshunter.io/ios/app/day-of-week-genius/id1507726330 (this page in markdown: same URL + `.md`) - Developer: [ByteLaunch](https://appshunter.io/developer/584748536) - Category: Productivity, Education - Price: Free - Rating: 5.00/5 from 12 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 11.0 · 18 MB - Languages: English - Released: 2020-04-16 - Data updated: 2026-11-03 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/day-of-week-genius/id1507726330/reviews.md ## What is Day of Week Genius? January 1st, 2000 fell on a Saturday. But could you be certain of this without a calendar? The answer is YES. Day of Week Genius is a workout app for your mind that you can use to learn to calculate the day of week for any given date within your own head! The app works by helping you memorize a few short lists and testing your recall skills with flashcard-like repetition. Then I teach you a simple equation to flawlessly determine the day of week for ANY date. If you can perform simple addition and divide by the number 7 you can be a Day of Week Genius, too! Features: * Learn about Day Codes, Month Codes, and Year Codes * Learn the Day of Week Equation * Learn and Practice in Tutorial Mode * Challenge yourself daily by taking the Day of Week Challenge * Using the "Show Me" feature, see the breakdown for the calculation on any challenged date Conclusion: I've seen a number of methods to learn how to calculate the weekday from any given date, including The Doomsday Algorithm, but this is hands down the best and the easiest method. This application breaks down the process in easy to understand bite-size chunks and many users can perform the Day of Week Genius feat within their first app session. So what are you waiting for? Impress others, impress your friends, and best of all, challenge yourself and unlock seemingly superhuman skills. Become a Day of Week Genius! ## Key features - Learn Day, Month, and Year Codes - Master the Day of Week Equation - Tutorial Mode for learning - Daily Day of Week Challenge - Calculation breakdown feature - Flashcard-style repetition ## Is Day of Week Genius safe? Not enough ratings yet to assess Day of Week Genius. ## Is Day of Week Genius legit? Day of Week Genius appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Day of Week Genius is 73 out of 100 points across 7 verification signals from App Store and developer data. ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/day-of-week-genius/id1507726330/reviews.md ### 5/5 — Fun *2020-04-16* Nice and fun. Way to Score some nerd points ## Frequently asked questions about Day of Week Genius ### How does Day of Week Genius work? Day of Week Genius helps you memorize key codes and a simple equation. Through flashcard-like repetition and a tutorial mode, you learn to calculate the day of the week for any date mentally. ### Is Day of Week Genius free to use? Yes, Day of Week Genius is completely free to download and use. There are no in-app purchases or advertisements. ### What devices is Day of Week Genius available on? Day of Week Genius is available on iPhone, iPad, and iPod devices. ### How often is Day of Week Genius updated? The app was last updated on May 1st, 2020, with version 1.5. It was initially released on April 16th, 2020. ### What is the age rating for Day of Week Genius? Day of Week Genius has an age rating of 4+, making it suitable for a wide range of users interested in mental calculation. ### Can I see how the calculation is done in Day of Week Genius? Yes, the 'Show Me' feature allows you to see a detailed breakdown of the calculation for any date you are challenged with. ### What makes Day of Week Genius different from other methods like the Doomsday Algorithm? The developer claims this method is the easiest and best, breaking down the process into easy-to-understand steps that many users can master within their first session. ### Does Day of Week Genius require an internet connection to work? The description does not specify offline capabilities, but the core functionality of memorization and calculation is likely designed to work without a constant internet connection. ## Version history (last 5 releases) ### 1.5 — 2020-05-01 Added a short promotional video. ### 1.3 — 2020-04-28 Hey, geniuses! This version has an improved app description. Thank you for the feedback. ### 1.2 — 2020-04-19 This version improves the user experience on the iPad. ### 1.1.6 — 2020-04-18 Various improvements app functionality and tutorial user experience. ### 1.0 — 2020-04-16 No release notes. ## Apps similar to Day of Week Genius | App | Rating | Price | Category | | --- | --- | --- | --- | | [Pastie Smart Clipboard](https://appshunter.io/ios/app/pastie-smart-clipboard/id6775383661) | — | Free | Productivity | | [Kalendr](https://appshunter.io/ios/app/kalendr/id6748597372) | — | Free | Productivity | | [Prompt Tutor: Notes & Prompts](https://appshunter.io/ios/app/prompt-tutor-notes-and-prompts/id6754504310) | — | Free | Productivity | | [OkOliver: AI Memory Assistant](https://appshunter.io/ios/app/okoliver-ai-memory-assistant/id6502351355) | 5.0 (2) | Free | Productivity | | [Tally: Habit Tracking](https://appshunter.io/ios/app/tally-habit-tracking/id6742843270) | 5.0 (2) | Free | Productivity | | [Sticky Notes : StickMe](https://appshunter.io/ios/app/sticky-notes-stickme/id6754407379) | — | Free | Productivity | --- *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 2026-11-03.*