# Vokabu vs Physics Zen

The clearest difference is update cadence: Physics Zen at every 3 days against Vokabu's weekly. Physics Zen also leads on iOS requirement (16.4 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Vokabu sells 2 in-app purchases, starting at $24.99 per month and Physics Zen sells 6 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Vokabu ships an update weekly, Physics Zen every 3 days. The most recent releases landed on October 28, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Vokabu | Physics Zen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/physics-zen-learn-and-practice/id6808595963/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | — | Freemium |
| Size | 30 MB | 85 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 12+ | 4+ |
| Developer | [Vokabu Systems Inc](https://appshunter.io/developer/1732345717) | [Ivan Terekhin](https://appshunter.io/developer/888645337) |

## What reviewers say

### Vokabu

[App page](https://appshunter.io/ios/app/vokabu-ai-language-practice/id6757460853)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vokabu Premium (Monthly) | $24.99 | per month |
| Vokabu Premium (Yearly) | $143.99 | per year |


### Physics Zen

[App page](https://appshunter.io/ios/app/physics-zen-learn-and-practice/id6808595963)

This app provides focused, repeatable physics practice with generated problems and instant feedback. Access theory and worked solutions as needed to master concepts across various topics and exam boards.

**Highlights:** Generated physics problems, Instant answer checking, On-demand theory and solutions, Mistake journal for review, Visual aids for concepts, Offline functionality, Multiple exam paths

**Features:** macOS Compatibility, Family Sharing, Vision Pro support, iPhone Duo support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Physics Zen Weekly | $3.99 | per 7 days |
| Physics Zen Monthly | $6.99 | per month |
| Physics Zen Annual | $29.99 | per year |
| Physics Zen Lifetime | $24.99 | one-time |
| Physics Zen Lifetime | $29.99 | one-time |
| Physics Zen Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Vokabu free?

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

### Is Physics Zen free?

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

### Do Vokabu or Physics Zen have ads?

Neither Vokabu nor Physics Zen shows ads.

### Which is updated more often, Vokabu or Physics Zen?

Vokabu ships an update weekly, and Physics Zen every 3 days. Most recently, Vokabu was updated on October 28, 2026 and Physics Zen on November 6, 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.*