# lemma vs Thuztra Learn

The clearest difference is in-app purchases: Thuztra Learn at none against lemma's 3. lemma's advantage is update cadence (every 3 days vs weekly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. lemma sells 3 in-app purchases, starting at $6.99 per 7 days. Thuztra Learn asks for nothing beyond the download.

lemma ships an update every 3 days, Thuztra Learn weekly. The most recent releases landed on September 19, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | lemma | Thuztra Learn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lemma-comp-math-trainer/id6770669166/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 31 MB | 32 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 12+ | 4+ |
| Developer | [Roger You](https://appshunter.io/developer/1804598101) | [Vansh Dhawan](https://appshunter.io/developer/6809566119) |

## What reviewers say

### lemma

[App page](https://appshunter.io/ios/app/lemma-comp-math-trainer/id6770669166)

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.

**Highlights:** Daily timed problem sprints, Per-category ELO skill tracking, Adaptive difficulty, Hints and step-through solutions, Streaks, XP, and achievements, Leaderboard

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lemma Premium | $6.99 | per 7 days |
| Lemma Premium | $9.99 | per month |
| Lemma Premium | $59.99 | per year |


### Thuztra Learn

[App page](https://appshunter.io/ios/app/thuztra-learn-quant-finance/id6809566117)

**In-app purchases:** none


## Frequently asked questions

### Is lemma free?

lemma is free to download, with in-app purchases available.

### Is Thuztra Learn free?

Thuztra Learn is free to download, with no in-app purchases.

### Do lemma or Thuztra Learn have ads?

Neither lemma nor Thuztra Learn shows ads.

### Which is updated more often, lemma or Thuztra Learn?

lemma ships an update every 3 days, and Thuztra Learn weekly. Most recently, lemma was updated on September 19, 2026 and Thuztra Learn on September 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*