Comparison

CalcFast vs Signal Generator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Calculation history display
  • Today Extension for quick calculations
  • Apple Watch app
  • Dark/light mode selection
  • External keyboard support
  • VoiceOver support
Features
Read 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.

About

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.

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
Read 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

CalcFast3 screens
Signal Generator4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
CalcFast versus Signal Generator: the parameters behind the verdict, then further details
ParameterCalcFastSignal Generator
PriceFree — better$0.99
Rating4.2 (20 ratings)4.6 (10 ratings) — better
Positive reviews78.3% of reviews85.7% of reviews — better
Number of ratings20 — better10
Update frequencyEvery 2 months — betterEvery 15 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.011.0 — better
Further details — not scored
Size6 MB2 MB
Age rating4+12+
DeveloperHannes Sverrisson龙刚 李

Customer experience

CalcFast

All ratings20 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews23 reviews
Positive78.3%
Neutral4.3%
Negative17.4%

Signal Generator

All ratings10 ratings
Positive90.0%
Neutral10.0%
Negative0.0%
Written reviews7 reviews
Positive85.7%
Neutral14.3%
Negative0.0%

In-app purchases

None

CalcFast

No in-app purchases

None

Signal Generator

No in-app purchases

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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