# Speed Reading vs f(x) Calc

The clearest difference is monetization model: f(x) Calc at free against Speed Reading's free with in-app purchases. f(x) Calc also leads on rating (5.0 vs 4.8). Speed Reading's advantage is ratings volume (182 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Speed Reading sells 10 in-app purchases, starting at $3.99 per 7 days and f(x) Calc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

f(x) Calc holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Speed Reading has 182 ratings behind it against 1, so its average is the more settled of the two.

Speed Reading ships an update every 3 weeks, f(x) Calc every 10 days. The most recent releases landed on September 8, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Speed Reading | f(x) Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (182 ratings)](https://appshunter.io/ios/app/speed-reading-rsvp-reader/id6737622922/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fx-calc/id6760609257/reviews)** |
| Number of ratings | **182** | 1 |
| Positive reviews | 87.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 70 MB | 5 MB |
| Requires iOS | **16** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Abdullah YILMAZ](https://appshunter.io/developer/1636324967) | [David Russell](https://appshunter.io/developer/1104864276) |

## What reviewers say

### Speed Reading

[App page](https://appshunter.io/ios/app/speed-reading-rsvp-reader/id6737622922)

Enhance your reading speed and comprehension with personalized training. This app offers gamified exercises, progress tracking, and science-backed methods to help you read faster and retain more information.

**Highlights:** Personalized learning path, Gamified exercises, Schultz Table training, Progress tracking, Reading speed assessment, Eye muscle training, Memory training

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Speed Readingo Premium - Weekly | $3.99 | per 7 days |
| Weekly Premium | $4.99 | per 7 days |
| Weekly premium | $4.99 | per 7 days |
| Weekly Premium-wft | $4.99 | per 7 days |
| Speed Readingo Premium - Monthly | $7.99 | per month |
| Speed Readingo Premium - Yearly | $34.99 | per year |
| Speed Readingo Premium - Yearly | $34.99 | per year |
| Yearly Premium | $39.99 | per year |
| Yearly premium | $39.99 | per year |
| Speed Readingo Premium - Lifetime | $49.99 | one-time |

**What reviewers like**

- 👍 Useful program
- 🚀 Efficient and enjoyable
- 🔓 Free and ad-free
- 💡 Helps improve reading speed and comprehension
- 👍 Great user experience

**What reviewers complain about**

- 🐛 Confusing interface
- 🐛 Difficulty progressing without paying
- 🐛 Exercises not customizable
- 🐛 Calibration issues

**Reported bugs**

- Inability to go back in the app
- Exercises not working as expected
- Freezing on certain screens

**Requested features**

- More customization options
- Offline mode
- Progress tracking
- Ability to repeat exercises


### f(x) Calc

[App page](https://appshunter.io/ios/app/fx-calc/id6760609257)

A full-featured scientific calculator designed for math and science students. It offers natural math entry and includes built-in examples to aid learning. A simplified Junior mode is available for everyday use.

**Highlights:** Natural Maths entry, Built-in learning examples, Junior mode for everyday use, Ideal for math and science study, Full-featured scientific calculator

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | Free | one-time |


## Frequently asked questions

### Is Speed Reading free?

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

### Is f(x) Calc free?

f(x) Calc is free to download, with in-app purchases available.

### Which has better reviews, Speed Reading or f(x) Calc?

f(x) Calc is rated higher. Speed Reading averages 4.8 out of 5 from 182 ratings, while f(x) Calc averages 5.0 from 1 ratings.

### Do Speed Reading or f(x) Calc have ads?

Neither Speed Reading nor f(x) Calc shows ads.

### Which is updated more often, Speed Reading or f(x) Calc?

Speed Reading ships an update every 3 weeks, and f(x) Calc every 10 days. Most recently, Speed Reading was updated on September 8, 2026 and f(x) Calc on September 23, 2026.

---

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