# calculator DUO vs Calculator+ Simple Math

The clearest difference is in-app purchases: Calculator+ Simple Math at none against calculator DUO's 1. Calculator+ Simple Math also leads on ads (none vs shown) and iOS requirement (13.0 vs 16.5). On price and device support there is nothing between them.

Both are free to download. calculator DUO sells 1 one-off in-app purchase. Calculator+ Simple Math asks for nothing beyond the download.

## The numbers

| Metric | calculator DUO | Calculator+ Simple Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/calculator-duo/id6739860116/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 10 days | — |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 19 MB |
| Requires iOS | 16.5 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Wenbin lei](https://appshunter.io/developer/1787331500) | [Space 64 LLC](https://appshunter.io/developer/1769185943) |

## What reviewers say

### calculator DUO

[App page](https://appshunter.io/ios/app/calculator-duo/id6739860116)

This utility app offers a modern calculator with a visual history feature, eliminating the need to memorize previous calculations. It also includes a comprehensive unit converter and a tip calculator that bases tips on pre-tax amounts.

**Highlights:** Visual history calculator (RESULT SHELF™), Unit converter, Tip calculator (pre-tax), Distraction-free design, Precise and efficient

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $7.99 | one-time |


### Calculator+ Simple Math

[App page](https://appshunter.io/ios/app/calculator-plus-simple-math/id6764523918)

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

**In-app purchases:** none


## Frequently asked questions

### Is calculator DUO free?

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

### Is Calculator+ Simple Math free?

Calculator+ Simple Math is free to download, with no in-app purchases.

### Do calculator DUO or Calculator+ Simple Math have ads?

calculator DUO shows ads; Calculator+ Simple Math 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.*