# DNA Viewer vs Math. Trainer App

The clearest difference is price: Math. Trainer App at Free against DNA Viewer's $4.99. DNA Viewer's advantage is in-app purchases (none vs 1) and ads (none vs shown).

Math. Trainer App is free to download; DNA Viewer costs $4.99 up front. Math. Trainer App sells 1 one-off in-app purchase. DNA Viewer asks for nothing beyond the download.

DNA Viewer ships an update every 2 days, Math. Trainer App every 3 weeks. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | DNA Viewer | Math. Trainer App |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/math-trainer-app/id6757082686/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 4 MB | 39 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [JONG HYUN LEE](https://appshunter.io/developer/1739037759) | [Blatt, Inc](https://appshunter.io/developer/1779835943) |

## What reviewers say

### DNA Viewer

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Math. Trainer App

[App page](https://appshunter.io/ios/app/math-trainer-app/id6757082686)

This app helps high school students memorize math formulas quickly for exams and homework. It features a formula bank, trainer mode with spaced repetition, and progress tracking to build long-term memory and confidence.

**Highlights:** Formula Bank (Algebra, Geometry, Trigonometry), Trainer Mode with Spaced Repetition, Adaptive Learning, Progress Tracking, Customizable Repetitions

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Removing ads | $1.99 | one-time |


## Frequently asked questions

### Is DNA Viewer free?

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

### Is Math. Trainer App free?

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

### Do DNA Viewer or Math. Trainer App have ads?

Math. Trainer App shows ads; DNA Viewer does not.

### Which is updated more often, DNA Viewer or Math. Trainer App?

DNA Viewer ships an update every 2 days, and Math. Trainer App every 3 weeks. Most recently, DNA Viewer was updated on October 6, 2026 and Math. Trainer App on October 7, 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.*