# Polygraf vs Pravopis

The clearest difference is in-app purchases: Polygraf at none against Pravopis's 4. Polygraf also leads on iOS requirement (9.0 vs 17.0). Pravopis's advantage is update cadence (every 2 weeks vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. Pravopis sells 4 in-app purchases, starting at $2.99 per month. Polygraf asks for nothing beyond the download.

Polygraf ships an update every 6 months, Pravopis every 2 weeks. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Polygraf | Pravopis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (3 ratings)](https://appshunter.io/ios/app/pravopis-slavic-spelling/id736584185/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 40 MB | 5 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Masaryk University](https://appshunter.io/developer/443178424) | [Matej Novak](https://appshunter.io/developer/670591834) |

## What reviewers say

### Polygraf

[App page](https://appshunter.io/ios/app/polygraf/id443178421)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pravopis

[App page](https://appshunter.io/ios/app/pravopis-slavic-spelling/id736584185)

This app offers a modern way to practice Czech spelling, ideal for quick sessions on the go. It includes cheat sheets for common grammar challenges and a personalized tutor feature that creates custom tests based on your past performance. Track your progress with detailed statistics and improve your language skills.

**Highlights:** Personalized test creation, Grammar cheat sheets, Progress tracking statistics, Customizable tests, On-the-go learning

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pravopis+ monthly | $2.99 | per month |
| Pravopis+ yearly | $22.99 | per year |
| Kategorie Velká a malá písmena | $0.99 | one-time |
| Lektor a Statistiky | $1.99 | one-time |


## Frequently asked questions

### Is Polygraf free?

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

### Is Pravopis free?

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

### Do Polygraf or Pravopis have ads?

Neither Polygraf nor Pravopis shows ads.

### Which is updated more often, Polygraf or Pravopis?

Polygraf ships an update every 6 months, and Pravopis every 2 weeks. Most recently, Polygraf was updated on November 6, 2026 and Pravopis on November 1, 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.*