# DNA Viewer vs lemma

The clearest difference is price: lemma at Free against DNA Viewer's $4.99. DNA Viewer's advantage is in-app purchases (none vs 3). On update cadence, ads, device support and iOS requirement there is nothing between them.

lemma is free to download; DNA Viewer costs $4.99 up front. lemma sells 3 in-app purchases, starting at $6.99 per 7 days. DNA Viewer asks for nothing beyond the download.

DNA Viewer ships an update every 2 days, lemma every 3 days. The most recent releases landed on September 18, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | DNA Viewer | lemma |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lemma-comp-math-trainer/id6770669166/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 days |
| Monetization | — | Free with in-app purchases |
| Size | 4 MB | 31 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [JONG HYUN LEE](https://appshunter.io/developer/1739037759) | [Roger You](https://appshunter.io/developer/1804598101) |

## What reviewers say

### DNA Viewer

[App page](https://appshunter.io/ios/app/dna-viewer/id6754238579)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 DNA Viewer free?

DNA Viewer costs $4.99, with no in-app purchases.

### Is lemma free?

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

### Do DNA Viewer or lemma have ads?

Neither DNA Viewer nor lemma shows ads.

### Which is updated more often, DNA Viewer or lemma?

DNA Viewer ships an update every 2 days, and lemma every 3 days. Most recently, DNA Viewer was updated on September 18, 2026 and lemma on September 19, 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.*