# iGst Calculator vs TMark

The clearest difference is in-app purchases: TMark at none against iGst Calculator's 3. TMark also leads on ads (none vs shown). iGst Calculator's advantage is update cadence (weekly vs every 2 months) and iOS requirement (12.0 vs 16.0). On price and device support there is nothing between them.

Both are free to download. iGst Calculator sells 3 in-app purchases, starting at $0.99 per month. TMark asks for nothing beyond the download.

iGst Calculator ships an update weekly, TMark every 2 months. The most recent releases landed on October 16, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | iGst Calculator | TMark |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 62 MB | 29 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jainam Rajpara](https://appshunter.io/developer/1193474709) | [Anuj Nigam](https://appshunter.io/developer/1751764206) |

## What reviewers say

### iGst Calculator

[App page](https://appshunter.io/ios/app/igst-calculator/id1497879507)

This app simplifies financial calculations with tools for GST, loans, investments, unit conversions, and currency exchange. It offers a user-friendly interface for both business owners and individuals to manage their finances efficiently.

**Highlights:** IGST tax calculation, Loan EMI estimation, SIP investment forecasting, Lumpsum investment insights, Unit conversion tool, Currency exchange rates

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month | $0.99 | per month |
| ad Free | $0.99 | per 3 months |
| Adfree for year | $0.99 | per year |


### TMark

[App page](https://appshunter.io/ios/app/tmark/id6752940682)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is iGst Calculator free?

iGst Calculator is free to download, with in-app purchases available.

### Is TMark free?

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

### Do iGst Calculator or TMark have ads?

iGst Calculator shows ads; TMark does not.

### Which is updated more often, iGst Calculator or TMark?

iGst Calculator ships an update weekly, and TMark every 2 months. Most recently, iGst Calculator was updated on October 16, 2026 and TMark on October 1, 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.*