# Physics Zen vs Start Physics

The clearest difference is iOS requirement: Physics Zen at 16.4 against Start Physics's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Physics Zen sells 6 in-app purchases, starting at $3.99 per 7 days and Start Physics sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Physics Zen ships an update every 3 days, Start Physics every 2 days. The most recent releases landed on November 10, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | Physics Zen | Start Physics |
| --- | --- | --- |
| 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 | Every 3 days | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 86 MB | 30 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ivan Terekhin](https://appshunter.io/developer/888645337) | [CHUNGKIL KIM](https://appshunter.io/developer/960187999) |

## What reviewers say

### 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. Instantly check answers and access theory or worked solutions when needed. It covers a comprehensive physics curriculum with exam preparation for various international standards.

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

**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 |


### Start Physics

[App page](https://appshunter.io/ios/app/start-physics/id6811021850)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Middle School Physics | $4.99 | one-time |
| Integrated Science: Physics | $4.99 | one-time |
| Mechanics and Energy | $6.99 | one-time |
| Electromagnetism & Quantum | $6.99 | one-time |
| Physics | $6.99 | one-time |


## Frequently asked questions

### Is Physics Zen free?

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

### Is Start Physics free?

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

### Do Physics Zen or Start Physics have ads?

Neither Physics Zen nor Start Physics shows ads.

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

Physics Zen ships an update every 3 days, and Start Physics every 2 days. Most recently, Physics Zen was updated on November 10, 2026 and Start Physics on November 13, 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.*