# Quarry: SQL & Python Prep

> Quarry: SQL & Python Prep (iPhone/iPad app by Mayank Gulaty.)

- Source: https://appshunter.io/ios/app/quarry-sql-and-python-prep/id6785931623 (this page in markdown: same URL + `.md`)
- Developer: [Mayank Gulaty](https://appshunter.io/developer/1850701548)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 127 MB
- Languages: English
- Released: 2026-07-07
- Data updated: 2026-07-28
- User reviews in markdown: https://appshunter.io/ios/app/quarry-sql-and-python-prep/id6785931623/reviews.md

## What is Quarry?

Quarry is a focused, offline gym for data and coding interviews. 108 hand-picked problems across SQL, pandas, and Python — write real code, run it on your device, and get graded instantly.

Everything runs on-device. The SQL and Python engines are built into the app, so there's no sign-up, no internet requirement, and nothing you write ever leaves your phone or iPad. Practice on a plane, on the subway, or anywhere.

WHAT'S INSIDE
• 108 problems across three tracks: SQL queries, pandas data wrangling, and Python algorithms & data structures.
• Real execution, real grading. Your output is checked against the expected result — no self-marking.
• Company tags. Filter problems by the company you're interviewing at.
• Hints and full solutions when you're stuck.
• Difficulty levels from Easy to Hard, grouped by topic.
• A free-form Playground for scratch SQL and Python.
• Universal app — designed for both iPhone and iPad.

PRIVATE BY DESIGN
No accounts. No analytics. No ads. No tracking. Quarry collects nothing and works fully offline.

Whether you're prepping for a data analyst, data engineer, data scientist, or software role, Quarry gives you a quiet, fast place to actually practice.


## Version history (last 1 release)

### 1.0 — 2026-07-07

No release notes.

---

*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 2026-07-28.*