CalcFast vs Signal Generator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CalcFast
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.
- Calculation history display
- Today Extension for quick calculations
- Apple Watch app
- Dark/light mode selection
- External keyboard support
- VoiceOver support
Read full descriptionHide full description
Fast and simple calculator for iPad, iPhone and Apple Watch that shows the calculation history, includes a Today Extension that allows for fast calculation by swiping down and 3D Touch for quick interactions. Numbers are formatted for your country, i.e. period in the US and comma in Europe. Ever lost your train of thought half way through a calculation and thought how handy it would be to review your calculations. The aim of this Calculator is to be fast, elegant and simple. Features: - The calculator can open side by side or over other apps in iPadOS. - Select dark or light mode. - External keyboard support. - Smart Apple Watch Calculator included. - Light weight Today Extension included. - Calculations shown when input and on tape. - Key click confirms pressing of buttons, which may be turned off. - Previous calculation is repeated when the equal sign is pressed. - Numbers are shown in local format, depending on your Region Formats, i.e. comma used in Europe. The number of decimal digits may be set in the Settings. - VoiceOver is supported. - Calculations Tape may be deleted by Tapping on it.
Signal Generator
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.
- Sine wave generation
- Square wave generation
- White noise generation
- Pink noise generation
- Two-channel phase difference waves
- Audio frequency response testing
- Hearing test capabilities
Read full descriptionHide full description
A high-quality audio Signal Generator for the iPhone. Now you can have a professional grade signal generator for your iPhone. Create sine waves, square waves, white noise, and pink noise. The signal generator can help you generate sine, square, triangle, sawtooth, white noise, pink noise signals and generate sine two-channel phase difference waves. You can use the signal generator to test your audio frequency response system, system noise scanning, headset burning machine and other scenarios. Test your hearing can hear how low the frequency of sound. Able to apply and experiment with test scenarios.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | CalcFast | Signal Generator |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.2 (20 ratings) | 4.6 (10 ratings) — better |
| Positive reviews | 78.3% of reviews | 85.7% of reviews — better |
| Number of ratings | 20 — better | 10 |
| Update frequency | Every 2 months — better | Every 15 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 2 MB |
| Age rating | 4+ | 12+ |
| Developer | Hannes Sverrisson | 龙刚 李 |
Customer experience
CalcFast
Signal Generator
In-app purchases
CalcFast
No in-app purchases
Signal Generator
No in-app purchases
Questions
Is CalcFast free?
Is Signal Generator free?
Which has better reviews, CalcFast or Signal Generator?
Do CalcFast or Signal Generator have ads?
Which is updated more often, CalcFast or Signal Generator?
Other comparisons















