# Physics Calc vs FlashRead

The clearest difference is price: FlashRead at Free against Physics Calc's $0.99. FlashRead also leads on update cadence (every 3 weeks vs every 5 weeks). Physics Calc's advantage is in-app purchases (none vs 3) and iOS requirement (12.1 vs 16.0). On ads and device support there is nothing between them.

FlashRead is free to download; Physics Calc costs $0.99 up front. FlashRead sells 3 in-app purchases, starting at $0.99 per month. Physics Calc asks for nothing beyond the download.

Physics Calc ships an update every 5 weeks, FlashRead every 3 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Physics Calc | FlashRead |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Size | 67 MB | 3 MB |
| Requires iOS | **12.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Isaac Cabello](https://appshunter.io/developer/1578202572) | [Hai-Chou Wang](https://appshunter.io/developer/1789103330) |

## What reviewers say

### Physics Calc

[App page](https://appshunter.io/ios/app/physics-calc/id1578202570)

**Features:** macOS Compatibility

**In-app purchases:** none


### FlashRead

[App page](https://appshunter.io/ios/app/flashread-improve-efficiency/id6745725776)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium for ONE month | $0.99 | per month |
| Premium for ONE year | $8.99 | per year |
| Premium Membership | $9.99 | one-time |


## Frequently asked questions

### Is Physics Calc free?

Physics Calc costs $0.99, with no in-app purchases.

### Is FlashRead free?

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

### Do Physics Calc or FlashRead have ads?

Neither Physics Calc nor FlashRead shows ads.

### Which is updated more often, Physics Calc or FlashRead?

Physics Calc ships an update every 5 weeks, and FlashRead every 3 weeks. Most recently, Physics Calc was updated on October 27, 2026 and FlashRead on October 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.*