# Stack Guru — Become and Stay a Stack Guru! > Card stack memorization and practice tool with Apple Watch integration. (iPhone/iPad app by Jonas Eriksson.) - Source: https://appshunter.io/ios/app/stack-guru/id1492951343 (this page in markdown: same URL + `.md`) - Developer: [Jonas Eriksson](https://appshunter.io/developer/305659705) - Category: Education, Utilities - Price: Free - Rating: 4.80/5 from 5 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 4 MB - Languages: English - Released: 2020-02-08 - Data updated: 2026-06-04 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/stack-guru/id1492951343/reviews.md ## What is Stack Guru? Become Mnemonica stack guru! Select how and what to practice, schedule reminders and practice directly on your wrist using Apple Watch - all with dark mode support! WHY While studying Mnemonica by Juan Tamariz, I started to look for an app to serve me as a learning tool. I wanted the app to automatically remind me to practice as well as being able to quickly practice on my Apple Watch (preferably with an complication displaying some daily progress). Unfortunately I did not find what I was looking for and decided to implement the app myself. This app became Stack Guru. CUSTOMIZE Practice parts of the stack, or the whole stack - you decide! Create your custom practice experience by combining practice modes such as Card to Number, Number to Card, What Comes After, What Comes Before or ACAAN, together with selected parts of the stack. This let you either focus on cementing the basics or perfecting your existing knowledge and master the stack. REMINDER Repetition is the mother of all learning. Stack Guru can help you both memorize and to keep the stack fresh in memory. Simply set reminders and let the app notify when to have a quick practice session. Like your own personal stack trainer. APPLE WATCH Having the tool directly on your wrist makes it super easy to take a short break and focus on the stack. Anywhere and anytime! Use the complication to get the progress of your daily goal and have a quick practice session only a tap away. SECURE AND PRIVATE Practice result data stored online is stored using Apple CloudKit (iCloud) to keep the data secure and private to you. The private database data is accessible only by you. When Stack Guru is used offline, the data is temporarily saved on the device to be synchronized and removed later, when the app is back online. ## Key features - Customizable practice modes - Scheduled practice reminders - Apple Watch integration - Dark mode support - CloudKit (iCloud) data security - Offline practice capability ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/stack-guru/id1492951343/reviews.md ### 5/5 — Excellent Trainer *2025-02-20* Great app! Works beautifully also on Apple Watch. The option to practice different associations (position, sequence, ACAAN) is super helpful! ### 5/5 — Elegant app! *2023-05-20, version 1.3* Beautiful modern aide for learning. And gorgeous descriptive journey into the realm of truly large numbers. Sisyphean stuff! ### 4/5 — A good trainer, but could use a few things. *2023-05-13* I like the app, but I wish it would let you use flash cards, in order, to see what the deck looks like instead of the grid format. I also don’t like that it shows cards like ♦️7, instead of the preferred 7 ♦️. Overall, a good trainer. I will continue to use it, but if they added and changed those things that would be amazing! ### 5/5 — Superb Tool to Master Mnemonica! *2023-03-09, version 1.3* What a little gem of an app. I really hope the developer continues to support updates. The only reason I haven’t updated to ios16 is that I’m bothered this app might not work anymore! Years ago I made my own video to practice this, but this makes it so much easier. Highly recommended!! ### 5/5 — The right tool for the job... *2020-05-05* This is the perfect app for upping your Mnemonica game. I really like the customization setting that allow me to work on specific goals and modify them as my skill improves. **Developer response:** Thank you very much! As always, please contact me if you find any missing features or bugs 🙂 ## Frequently asked questions about Stack Guru ### What is Stack Guru used for? Stack Guru is an educational app designed to help users memorize and practice specific card stacks, such as Mnemonica. It offers customizable practice modes and reminders to aid in learning and retention. ### How does Stack Guru help with learning? It employs repetition through scheduled reminders and allows users to focus on specific parts of the stack or combine different practice modes like 'Card to Number' or 'What Comes After'. ### Can I practice Stack Guru on my Apple Watch? Yes, Stack Guru offers seamless integration with Apple Watch, allowing you to practice directly on your wrist. You can also use the complication to view daily progress at a glance. ### Is my practice data secure with Stack Guru? Stack Guru uses Apple CloudKit (iCloud) to store practice result data online, ensuring it is secure and private to you. Offline data is temporarily saved on the device and synchronized later. ### Does Stack Guru have ads? No, Stack Guru is ad-free, providing an uninterrupted learning experience for users. ### What devices does Stack Guru support? Stack Guru is available on Apple devices, including the Apple Watch, iPhone, and iPod Touch. ### How often is Stack Guru updated? The app was last updated on May 20, 2020, with the latest version being 1.3. This indicates a history of development and potential for future updates. ### What is the age rating for Stack Guru? Stack Guru has an age rating of 4+, making it suitable for a wide range of users interested in memory training and card stack memorization. ## Version history (last 4 releases) ### 1.3 — 2020-05-20 * Always select Stack tab when opening the app from notification * Display Practice in iOS 13 modal style * Display stack as grid (two cards per row) on Apple Watch ### 1.2 — 2020-04-29 * New practice mode: ACAAN * Fixed a bug not resetting watch complications at midnight ### 1.1 — 2020-03-31 * New practice mode: What Comes After * New practice mode: What Comes Before * Fixed a bug causing the app to crash when selecting the Help tab ### 1.0 — 2020-02-08 No release notes. ## Apps similar to Stack Guru | App | Rating | Price | Category | | --- | --- | --- | --- | | [memorize.ai: Learn Lazily](https://appshunter.io/ios/app/memorizeai-learn-lazily/id1462251805) | 5.0 (7) | Free | Education | | [PushToCam for Telescope](https://appshunter.io/ios/app/pushtocam-for-telescope/id1639616441) | 4.3 (8) | Free | Education | | [Cube Algorithms X](https://appshunter.io/ios/app/cube-algorithms-x/id1546834302) | 4.8 (28) | $5.99 | Education | | [Cube CFOP](https://appshunter.io/ios/app/cube-cfop/id1236657805) | 4.8 (163) | $1.99 | Education | | [Stack Memory](https://appshunter.io/ios/app/stack-memory/id6502915915) | 4.5 (8) | Free | Education | | [The Family.](https://appshunter.io/ios/app/the-family/id6471411244) | 5.0 (4) | Free | Education | ## More apps by Jonas Eriksson - [Uppsala Magic and Comedy](https://appshunter.io/ios/app/uppsala-magic-and-comedy/id863566142) All apps by Jonas Eriksson: https://appshunter.io/developer/305659705 ## Related topics [mnemonica](https://appshunter.io/ios/topics/mnemonica) --- *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 2026-06-04.*