# Physics Answers vs AP Physics C, 2e

The clearest difference is update cadence: Physics Answers at every 3 months against AP Physics C, 2e's every 7 months. Physics Answers also leads on iOS requirement (11.4 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Physics Answers sells 2 in-app purchases, starting at $9.99 per month and AP Physics C, 2e sells 5 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Physics Answers ships an update every 3 months, AP Physics C, 2e every 7 months. The most recent releases landed on September 9, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Physics Answers | AP Physics C, 2e |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Size | 111 MB | 57 MB |
| Requires iOS | **11.4** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Biobrain Learning Pty Ltd](https://appshunter.io/developer/1371680532) | [Expanded Apps](https://appshunter.io/developer/313709778) |

## What reviewers say

### Physics Answers

[App page](https://appshunter.io/ios/app/physics-answers-ap-physics/id1510694550)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Content | $9.99 | per month |
| All Content | $49.99 | per year |


### AP Physics C, 2e

[App page](https://appshunter.io/ios/app/ap-physics-c-2e-test-prep/id1578353209)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Week | $5.99 | per 7 days |
| 1 Week | $6.99 | per 7 days |
| 1 Month | $17.99 | per month |
| 1 Year | $69.99 | per year |
| AP Physics C, 2e - Test Prep | $15.99 | one-time |


## Frequently asked questions

### Is Physics Answers free?

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

### Is AP Physics C, 2e free?

AP Physics C, 2e is free to download, with in-app purchases available.

### Do Physics Answers or AP Physics C, 2e have ads?

Neither Physics Answers nor AP Physics C, 2e shows ads.

### Which is updated more often, Physics Answers or AP Physics C, 2e?

Physics Answers ships an update every 3 months, and AP Physics C, 2e every 7 months. Most recently, Physics Answers was updated on September 9, 2026 and AP Physics C, 2e on September 17, 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.*