21+ iOS apps & games curated and reviewed
If you already know lemma, this is the deeper bench. 21+ lemma apps and games for iPhone, all reviewed and ranked by user rating, recency, and download trend as of September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 5.0★ (1) | No | Yes | Sep 2026 | |
| 2 |  | Free | — | Yes | Yes | Jul 2026 | |
| 3 |  | Free | — | No | Yes | Jul 2026 | |
| 4 |  | Free | — | Yes | No | May 2026 | |
| 5 |  | Free | — | No | No | May 2026 | |
| 6 |  | Free was $4.99 | 5.0★ (1) | No | Yes | Jun 2026 | |
| 7 |  | $3.99 | — | No | No | Aug 2026 | |
| 8 |  | Free was $3.99 | 5.0★ (5) | Yes | No | May 2026 |
This app provides focused, daily practice for quantitative interviews, featuring timed sprints of math and probability problems. It tracks your skill across disciplines with adaptive difficulty and offers hints and solutions to help you improve. Designed for those preparing for trading firm interviews or seeking to build a quantitative thinking habit.
