# calculator DUO vs Calculator .

The clearest difference is rating: calculator DUO at 5.0 against Calculator .'s 3.5. Calculator .'s advantage is ads (none vs shown). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

Both are free to download. calculator DUO sells 1 one-off in-app purchase and Calculator . sells 4 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

calculator DUO holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 3 and 8 respectively.

calculator DUO ships an update every 10 days, Calculator . fortnightly. The most recent releases landed on October 9, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | calculator DUO | Calculator . |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/calculator-duo/id6739860116/reviews)** | [3.5 (8 ratings)](https://appshunter.io/ios/app/calculator-ai-math-solver/id6776479693/reviews) |
| Number of ratings | 3 | **8** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 11 MB | 7 MB |
| Requires iOS | 16.5 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Wenbin lei](https://appshunter.io/developer/1787331500) | [Hong Kong Global Cross-Border E-Commerce Co., Limited](https://appshunter.io/developer/1693750577) |

## 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 .

[App page](https://appshunter.io/ios/app/calculator-ai-math-solver/id6776479693)

This utility app combines standard and scientific calculations with unit and currency conversions. It features a clean interface, calculation history, and automatic rate updates for currencies. Easily switch between functions without leaving the app.

**Highlights:** Standard and scientific calculator, Unit conversion (length, weight, area, volume, temperature), Currency conversion with automatic rate updates, Calculation history, Distraction-free dark interface

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Peak | $4.99 | per 7 days |
| Weekly Ring | $9.99 | per 7 days |
| Yearly Peak | $39.99 | per year |
| Yearly Ring | $39.99 | per year |


## Frequently asked questions

### Is calculator DUO free?

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

### Is Calculator . free?

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

### Which has better reviews, calculator DUO or Calculator .?

calculator DUO is rated higher. calculator DUO averages 5.0 out of 5 from 3 ratings, while Calculator . averages 3.5 from 8 ratings.

### Do calculator DUO or Calculator . have ads?

calculator DUO shows ads; Calculator . does not.

### Which is updated more often, calculator DUO or Calculator .?

calculator DUO ships an update every 10 days, and Calculator . fortnightly. Most recently, calculator DUO was updated on October 9, 2026 and Calculator . on October 25, 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.*