# Math Simply vs calculator DUO

The clearest difference is price: calculator DUO at Free against Math Simply's $1.99. calculator DUO also leads on update cadence (every 10 days vs every 2 months). Math Simply's advantage is in-app purchases (none vs 1) and ads (none vs shown). On review sentiment, device support and iOS requirement there is nothing between them.

calculator DUO is free to download; Math Simply costs $1.99 up front. calculator DUO sells 1 one-off in-app purchase. Math Simply asks for nothing beyond the download.

Math Simply ships an update every 2 months, calculator DUO every 10 days. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Math Simply | calculator DUO |
| --- | --- | --- |
| Price | $1.99 | **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 | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 4 MB | 11 MB |
| Requires iOS | 17.0 | **16.5** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [振捷 周](https://appshunter.io/developer/1526093328) | [Wenbin lei](https://appshunter.io/developer/1787331500) |

## What reviewers say

### Math Simply

[App page](https://appshunter.io/ios/app/math-simply/id6468932496)

This app offers a simple, ad-free calculator with a home screen widget for quick calculations. It also includes a comprehensive unit converter and extensive personalization options. Future updates are included with a one-time purchase.

**Highlights:** Home screen widget calculator, Unit converter (100+ units), Cache memory function, User-friendly hints, Global localization, Personalization options, One-time purchase for life

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Math Simply free?

Math Simply costs $1.99, with no in-app purchases.

### Is calculator DUO free?

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

### Do Math Simply or calculator DUO have ads?

calculator DUO shows ads; Math Simply does not.

### Which is updated more often, Math Simply or calculator DUO?

Math Simply ships an update every 2 months, and calculator DUO every 10 days. Most recently, Math Simply was updated on October 7, 2026 and calculator DUO on October 9, 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.*