CalcFast vs GST Calc+
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
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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.
GST Calc+
This utility app simplifies GST calculations with a combined calculator for Indian GST rates. It allows for quick addition or removal of GST from amounts, displays CGST/SGST breakdowns, and supports custom tax rates. Calculations can be easily shared or copied.
- Add or remove GST with a button
- Customizable tax rates
- Real-time calculation as you type
- CGST and SGST breakdown
- Copy and share calculations
- IGST, CGST, SGST bifurcation
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GST Calculator is a useful combined GST Calculator for all GST Rates that allows you to calculate Indian GST Rates as per GST Tax Slabs. Best GST Calculator for instant GST calculation with history Calculate GST Tax on the go along with other mathematical calculations. GST Calculator Tool is simple, easy to use and the quickest way to calculate Goods and Service Tax (GST) on sales or purchase of goods or services. GST Calculator Tool is combination of two calculators: Simple GST Calculator Useful to calculate GST quickly with simple interface optimised for GST calculations. Simply enter the Initial Amount of transaction and the GST Rate and get the results calculated as you type in. You can see the amount inclusive or exclusive of tax amount. Simply use "Add GST" to get the total amount of goods or services including GST or "Remove GST" to get the net amount of goods or services exclusive of GST. Generally kept GST calculations as a core feature, this calculator tool is handy and useful to calculate other percentage based calculations including Discount calculations, Tip calculations or even simple percentage calculations. Features: - Add or Remove the GST from given amount with touch of a button - Set custom tax rate along with pre-provided 3%, 5%, 12%, 18% and 28% (You can modify these rates) - Get results calculated as you type in - Shows CGST and SGST calculations - Copy and share the final GST calculation Combined GST Calculator in equipped with GST Calculation Box which allows to copy and share the GST Calculations and also show the bifurcation of the taxes as per current Indian Goods and Service Tax system in form of IGST, CGST and SGST. You can turn the box on and off from settings or from the handy button provided above the input board in this calculator. Both of this GST Tax Calculator show taxes bifurcated as IGST (Integrated Goods and Service Tax) Calculations for Inter State Supply in India, while CGST (Central Goods and Service Tax) and SGST (State Goods and Service Tax) calculations for Intra State Supply in India. We have predefined set of GST Rates which are 3%, 5%, 12%, 18% and 28% so that you can quickly carry out the calculation. You can customize the Rates as per your need in settings. You can also share or copy your calculations with handy buttons.
Screenshots
Verdict
The clearest difference is review sentiment: CalcFast at 78% against GST Calc+'s 0%. CalcFast also leads on ads (none vs shown) and monetization model (free vs ad-supported). GST Calc+'s advantage is iOS requirement (12.0 vs 18.0). On price, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
CalcFast ships an update every 2 months, GST Calc+ every 4 months. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.
| Parameter | CalcFast | GST Calc+ |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (20 ratings) — better | — |
| Positive reviews | 78.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 20 — better | — |
| Update frequency | Every 2 months — better | Every 4 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Hannes Sverrisson | Fonts Apps |
Customer experience
CalcFast
GST Calc+
In-app purchases
CalcFast
No in-app purchases
GST Calc+
No in-app purchases
Questions
Is CalcFast free?
Is GST Calc+ free?
Do CalcFast or GST Calc+ have ads?
Which is updated more often, CalcFast or GST Calc+?
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