# Heap Structures — Drill 160 Qs Offline

> Drill 160 Qs Offline (iPhone/iPad app by Tsuyoshi Sezaki.)

- Source: https://appshunter.io/ios/app/heap-structures/id6773992415 (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: 2026-06-03
- Data updated: 2026-07-21
- User reviews in markdown: https://appshunter.io/ios/app/heap-structures/id6773992415/reviews.md

## What is Heap Structures?

Heap Structures is an independent study app for learning, reviewing, and practicing priority queues, binary heaps, heap operations, complexity, invariants, implementation details, and common mistakes.

Built for students, interview prep, self-taught developers, and anyone who wants focused practice on heap-based data structures.

Features:
- 160 practice questions across Fundamentals, Practical Skills, Common Pitfalls, and Advanced Concepts
- Every question includes an explanation
- Spaced-repetition review using FSRS-style intervals
- Weak-point heatmap to spot topics that need more work
- Daily challenge for consistent practice
- Mock exams for timed review
- Offline practice, no login required

Use the app to review core ideas, test implementation knowledge, catch edge-case errors, and build confidence before coursework, interviews, or independent study sessions.

Practice offline, no login required.

Independent study app for Heap Structures 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 — 2026-06-03

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 2026-07-21.*