# Calculator vs Thundra

The clearest difference is in-app purchases: Thundra at none against Calculator's 4. Thundra also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Calculator sells 4 in-app purchases, starting at $2.49 per month. Thundra asks for nothing beyond the download.

## The numbers

| Metric | Calculator | Thundra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (200 ratings)](https://appshunter.io/ios/app/calculator-basic-and-scientific/id1521827072/reviews)** | — |
| Number of ratings | **200** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | — |
| Monetization | Freemium | — |
| Size | 36 MB | 27 MB |
| Requires iOS | 15.0 | **14.0.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wuhan Ananta Technology Co., Ltd.](https://appshunter.io/developer/1508854889) | [Exafan SAU](https://appshunter.io/developer/1545105839) |

## What reviewers say

### Calculator

[App page](https://appshunter.io/ios/app/calculator-basic-and-scientific/id1521827072)

This app combines basic, scientific, currency, and unit conversion tools into a single, powerful calculator. It offers features like history records, number speech, and seamless result inheritance across different calculator types for an efficient workflow.

**Highlights:** Basic and scientific calculations, Currency converter with 150+ currencies, Units converter for various measurements, History records with save, copy, and paste, Number speech for input accuracy, Seamless result inheritance across calculators, Offline usage and customizable themes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Membership - 1 Month | $2.49 | per month |
| Premium Monthly Pro | $2.49 | per month |
| Premium Membership - 1 Week | $2.49 | per 7 days |
| Premium Membership - 1 Year | $26.99 | per year |


### Thundra

[App page](https://appshunter.io/ios/app/thundra/id6757915984)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calculator free?

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

### Is Thundra free?

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

### Do Calculator or Thundra have ads?

Calculator shows ads; Thundra does not.

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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.*