# CalcFast vs Signal Generator

The clearest difference is price: CalcFast at Free against Signal Generator's $0.99. CalcFast also leads on update cadence (every 2 months vs every 15 months). Signal Generator's advantage is rating (4.6 vs 4.2) and iOS requirement (11.0 vs 18.0). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

CalcFast is free to download; Signal Generator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Signal Generator holds the better App Store score, 4.6 against 4.2. Both are backed by a comparable volume of ratings — 20 and 10 respectively. Written reviews point the same way: 78% of CalcFast's written reviews are positive against 86% of Signal Generator's.

CalcFast ships an update every 2 months, Signal Generator every 15 months. The most recent releases landed on September 19, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | CalcFast | Signal Generator |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.2 (20 ratings)](https://appshunter.io/ios/app/calcfast/id876781417/reviews) | **[4.6 (10 ratings)](https://appshunter.io/ios/app/signal-generator-wave/id1309709776/reviews)** |
| Number of ratings | **20** | 10 |
| Positive reviews | 78.3% of reviews | **85.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 15 months |
| Monetization | **Free** | Paid |
| Size | 6 MB | 2 MB |
| Requires iOS | 18.0 | **11.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Hannes Sverrisson](https://appshunter.io/developer/428851947) | [龙刚 李](https://appshunter.io/developer/1241843884) |

## 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


### Signal Generator

[App page](https://appshunter.io/ios/app/signal-generator-wave/id1309709776)

Generate high-quality audio signals including sine, square, triangle, sawtooth waves, and white/pink noise. Ideal for testing audio systems, frequency response, and hearing capabilities.

**Highlights:** Sine wave generation, Square wave generation, White noise generation, Pink noise generation, Two-channel phase difference waves, Audio frequency response testing, Hearing test capabilities

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

**In-app purchases:** none


## Frequently asked questions

### Is CalcFast free?

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

### Is Signal Generator free?

Signal Generator costs $0.99, with no in-app purchases.

### Which has better reviews, CalcFast or Signal Generator?

Signal Generator is rated higher. CalcFast averages 4.2 out of 5 from 20 ratings, while Signal Generator averages 4.6 from 10 ratings.

### Do CalcFast or Signal Generator have ads?

Neither CalcFast nor Signal Generator shows ads.

### Which is updated more often, CalcFast or Signal Generator?

CalcFast ships an update every 2 months, and Signal Generator every 15 months. Most recently, CalcFast was updated on September 19, 2026 and Signal Generator on September 9, 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.*