# CalcFast vs GST Calc+

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 27.1). On price, in-app purchases and device support there is nothing between them.

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 21, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | CalcFast | GST Calc+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (21 ratings)](https://appshunter.io/ios/app/calcfast/id876781417/reviews)** | — |
| Number of ratings | **21** | — |
| Positive reviews | **78.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | **Free** | Ad-supported |
| Size | 6 MB | 15 MB |
| Requires iOS | 27.1 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hannes Sverrisson](https://appshunter.io/developer/428851947) | [Fonts Apps](https://appshunter.io/developer/1696056845) |

## 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


### GST Calc+

[App page](https://appshunter.io/ios/app/gst-calc-plus/id6452276690)

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.

**Highlights:** 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

**In-app purchases:** none


## Frequently asked questions

### Is CalcFast free?

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

### Is GST Calc+ free?

GST Calc+ is free to download, with no in-app purchases.

### Do CalcFast or GST Calc+ have ads?

GST Calc+ shows ads; CalcFast does not.

### Which is updated more often, CalcFast or GST Calc+?

CalcFast ships an update every 2 months, and GST Calc+ every 4 months. Most recently, CalcFast was updated on October 21, 2026 and GST Calc+ on October 8, 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.*