# CalcFast vs Brainwaves Frequency Generator

The clearest difference is in-app purchases: CalcFast at none against Brainwaves Frequency Generator's 7. CalcFast also leads on review sentiment (78% vs 70%). Brainwaves Frequency Generator's advantage is update cadence (every 4 days vs every 2 months) and rating (4.4 vs 4.2). On price and ads there is nothing between them.

Both are free to download. Brainwaves Frequency Generator sells 7 in-app purchases, starting at $9.99 per month. CalcFast asks for nothing beyond the download.

Brainwaves Frequency Generator holds the better App Store score, 4.4 against 4.2. That said, the two scores are not equally well evidenced: Brainwaves Frequency Generator has 169 ratings behind it against 20, so its average is the more settled of the two. Written reviews complicate that: 78% of CalcFast's written reviews are positive against 70% of Brainwaves Frequency Generator's, so the app with the better star average is not the one people write more warmly about.

CalcFast ships an update every 2 months, Brainwaves Frequency Generator every 4 days. The most recent releases landed on September 19, 2026 and August 26, 2026 respectively.

## The numbers

| Metric | CalcFast | Brainwaves Frequency Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (20 ratings)](https://appshunter.io/ios/app/calcfast/id876781417/reviews) | **[4.4 (169 ratings)](https://appshunter.io/ios/app/brainwaves-frequency-generator/id6445854548/reviews)** |
| Number of ratings | 20 | **169** |
| Positive reviews | **78.3% of reviews** | 70.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 6 MB | 50 MB |
| Requires iOS | 18.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Hannes Sverrisson](https://appshunter.io/developer/428851947) | [Brainwave Frequency, LLC](https://appshunter.io/developer/1674255468) |

## What reviewers say

### CalcFast

[App page](https://appshunter.io/ios/app/calcfast/id876781417)

A fast and elegant calculator for Apple devices that displays your calculation history. It offers a Today Extension for quick access and supports Apple Watch, external keyboards, and VoiceOver.

**Highlights:** Calculation history display, Today Extension for quick calculations, Apple Watch app, Dark/light mode selection, External keyboard support, VoiceOver support

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

**In-app purchases:** none


### Brainwaves Frequency Generator

[App page](https://appshunter.io/ios/app/brainwaves-frequency-generator/id6445854548)

Enhance sleep quality and boost focus with scientifically-proven brainwave frequencies. Choose from a library of soothing sounds to induce relaxation or sharpen concentration for improved productivity and well-being.

**Highlights:** Binaural beats for sleep and focus, Diverse library of soothing frequencies, Delta, theta, alpha, and beta wave options, Customizable frequency controls, Enhances sleep quality, Boosts focus and productivity

**Features:** macOS Compatibility, Siri integration

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $9.99 | per month |
| 1 Month | $9.99 | per month |
| Semester | $49.99 | per 6 months |
| Semester | $49.99 | per 6 months |
| Annual | $59.99 | per year |
| Annual | $59.99 | per year |
| Lifetime Access | $149.99 | one-time |


## Frequently asked questions

### Is CalcFast free?

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

### Is Brainwaves Frequency Generator free?

Brainwaves Frequency Generator is free to download, with in-app purchases available.

### Which has better reviews, CalcFast or Brainwaves Frequency Generator?

Brainwaves Frequency Generator is rated higher. CalcFast averages 4.2 out of 5 from 20 ratings, while Brainwaves Frequency Generator averages 4.4 from 169 ratings.

### Do CalcFast or Brainwaves Frequency Generator have ads?

Neither CalcFast nor Brainwaves Frequency Generator shows ads.

### Which is updated more often, CalcFast or Brainwaves Frequency Generator?

CalcFast ships an update every 2 months, and Brainwaves Frequency Generator every 4 days. Most recently, CalcFast was updated on September 19, 2026 and Brainwaves Frequency Generator on August 26, 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.*