# Physics Answers vs Physics Study BD

The clearest difference is in-app purchases: Physics Study BD at none against Physics Answers's 2. Physics Study BD also leads on update cadence (every 2 weeks vs every 3 months). Physics Answers's advantage is device support (3 vs 1) and iOS requirement (11.4 vs 16.0). On price and ads there is nothing between them.

Both are free to download. Physics Answers sells 2 in-app purchases, starting at $9.99 per month. Physics Study BD asks for nothing beyond the download.

Physics Answers ships an update every 3 months, Physics Study BD every 2 weeks. The most recent releases landed on September 9, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Physics Answers | Physics Study BD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Size | 111 MB | 35 MB |
| Requires iOS | **11.4** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Biobrain Learning Pty Ltd](https://appshunter.io/developer/1371680532) | [Science Platform](https://appshunter.io/developer/1769242103) |

## 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 |


### Physics Study BD

[App page](https://appshunter.io/ios/app/physics-study-bd/id6781135942)

**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 Physics Study BD free?

Physics Study BD is free to download, with no in-app purchases.

### Do Physics Answers or Physics Study BD have ads?

Neither Physics Answers nor Physics Study BD shows ads.

### Which is updated more often, Physics Answers or Physics Study BD?

Physics Answers ships an update every 3 months, and Physics Study BD every 2 weeks. Most recently, Physics Answers was updated on September 9, 2026 and Physics Study BD on September 25, 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.*