# Mental Math vs lemma

Mental Math and lemma are too close to call on the numbers: across 8 compared parameters — price, rating, ratings volume and ads among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Mental Math sells 3 in-app purchases, starting at $2.99 per 7 days and lemma sells 3 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Mental Math against 5.0 for lemma. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

## The numbers

| Metric | Mental Math | lemma |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/mental-math-quick-math-tests/id6757763893/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/lemma-comp-math-trainer/id6770669166/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Monetization | Freemium | Free with in-app purchases |
| Size | 56 MB | 31 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Heat Studio LLC](https://appshunter.io/developer/1766372656) | [Roger You](https://appshunter.io/developer/1804598101) |

## What reviewers say

### Mental Math

[App page](https://appshunter.io/ios/app/mental-math-quick-math-tests/id6757763893)

Enhance your mental math skills for consulting, investment banking, and quant interviews. Practice realistic drills, track your progress with streaks, and build confidence with adaptive exercises and exam-style sessions.

**Highlights:** Adaptive drills, Case math chains, Estimation sandbox, Lightning rounds, Interview mode, Exam-style sessions, Career-specific prep

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Career Pass - Weekly | $2.99 | per 7 days |
| Career Pass - Monthly | $7.99 | per month |
| Career Pass - Annual | $24.99 | per year |


### 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 |


## Frequently asked questions

### Is Mental Math free?

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

### Is lemma free?

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

### Which has better reviews, Mental Math or lemma?

Mental Math and lemma are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Mental Math or lemma have ads?

Neither Mental Math nor lemma shows ads.

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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.*