# Recursion Principles — Practice Concepts Offline

> Practice Concepts Offline (iPhone/iPad app by Tsuyoshi Sezaki.)

- Source: https://appshunter.io/ios/app/recursion-principles/id6773499574 (this page in markdown: same URL + `.md`)
- Developer: [Tsuyoshi Sezaki](https://appshunter.io/developer/1886356149)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 15.1 · 38 MB
- Languages: American English
- Released: 2026-05-29
- Data updated: 2026-07-20
- User reviews in markdown: https://appshunter.io/ios/app/recursion-principles/id6773499574/reviews.md

## What is Recursion Principles?

Recursion Principles is an independent study app for building confidence with recursive thinking, from base cases and call stacks to divide-and-conquer patterns and advanced edge cases.

Designed for students, self-taught developers, interview candidates, and anyone reviewing core computer science concepts, the app turns recursion practice into short focused sessions.

- 160 questions across Fundamentals, Practical Skills, Common Pitfalls, and Advanced Concepts
- Every question includes an explanation so you can learn from each answer
- FSRS spaced-repetition intervals help schedule review at the right time
- Weak-point heatmap highlights topics that need attention
- Daily challenge for consistent practice
- Mock exams for timed review and progress checks
- Offline practice, no login required

Practice offline, no login required.

Independent study app for Recursion Principles practice. Not affiliated with, endorsed by, or sponsored by any company, certification body, exam operator, or vendor. All trademarks belong to their respective owners.


## Version history (last 1 release)

### 1.0 — 2026-05-29

No release notes.

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All apps by Tsuyoshi Sezaki: https://appshunter.io/developer/1886356149

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*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 2026-07-20.*