# Physics Ai vs CWENG Test Prep

The clearest difference is iOS requirement: CWENG Test Prep at 13.0 against Physics Ai's 15.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Physics Ai sells 3 in-app purchases, starting at $4.99 per 7 days and CWENG Test Prep sells 3 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Physics Ai | CWENG Test Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Size | 61 MB | 26 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Codememory LLC](https://appshunter.io/developer/1474903109) | [FLY SKY PTY LTD](https://appshunter.io/developer/1838696534) |

## What reviewers say

### Physics Ai

[App page](https://appshunter.io/ios/app/physics-ai-math-and-chemistry/id6758949899)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $4.99 | per 7 days |
| Premium Yearly | $29.99 | per year |
| Physics Ai Pro Lifetime | $69.99 | one-time |


### CWENG Test Prep

[App page](https://appshunter.io/ios/app/cweng-test-prep/id6782511149)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Certified Welding Engineer Ful | $6.99 | per 7 days |
| Certified Welding Engineer Ful | $16.99 | per month |
| Certified Welding Engineer Ful | $69.99 | one-time |


## Frequently asked questions

### Is Physics Ai free?

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

### Is CWENG Test Prep free?

CWENG Test Prep is free to download, with in-app purchases available.

### Do Physics Ai or CWENG Test Prep have ads?

Neither Physics Ai nor CWENG Test Prep shows ads.

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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.*