# lemma vs Tally

The clearest difference is update cadence: lemma at every 3 days against Tally's every 2 weeks. lemma also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. lemma sells 3 in-app purchases, starting at $6.99 per 7 days and Tally sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

lemma ships an update every 3 days, Tally every 2 weeks. The most recent releases landed on October 12, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | lemma | Tally |
| --- | --- | --- |
| 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 | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 31 MB | 2 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Roger You](https://appshunter.io/developer/1804598101) | [SG APPs](https://appshunter.io/developer/1507658418) |

## 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 |


### Tally

[App page](https://appshunter.io/ios/app/tally-mental-math-trainer/id6787205145)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | per month |
| Pro Yearly | $24.99 | per year |
| Pro Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is lemma free?

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

### Is Tally free?

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

### Do lemma or Tally have ads?

Neither lemma nor Tally shows ads.

### Which is updated more often, lemma or Tally?

lemma ships an update every 3 days, and Tally every 2 weeks. Most recently, lemma was updated on October 12, 2026 and Tally on September 27, 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.*