# Physics Answers vs Horizons Reading

The clearest difference is in-app purchases: Horizons Reading at none against Physics Answers's 2. Physics Answers's advantage is iOS requirement (11.4 vs 15.6). On price, ads 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. Horizons Reading asks for nothing beyond the download.

## The numbers

| Metric | Physics Answers | Horizons Reading |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Size | 111 MB | 6 MB |
| Requires iOS | **11.4** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Biobrain Learning Pty Ltd](https://appshunter.io/developer/1371680532) | [Ming Song](https://appshunter.io/developer/6796897019) |

## 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 |


### Horizons Reading

[App page](https://appshunter.io/ios/app/horizons-reading/id6796897017)

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

**In-app purchases:** none


## Frequently asked questions

### Is Physics Answers free?

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

### Is Horizons Reading free?

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

### Do Physics Answers or Horizons Reading have ads?

Neither Physics Answers nor Horizons Reading shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*