# calculator DUO vs Trigintuple Calc

The clearest difference is in-app purchases: Trigintuple Calc at none against calculator DUO's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. calculator DUO sells 1 one-off in-app purchase. Trigintuple Calc asks for nothing beyond the download.

calculator DUO ships an update every 10 days, Trigintuple Calc every 2 weeks. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | calculator DUO | Trigintuple Calc |
| --- | --- | --- |
| 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 | Yes |
| Update frequency | **Every 10 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 37 MB |
| Requires iOS | 16.5 | **15.8.3** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Wenbin lei](https://appshunter.io/developer/1787331500) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## 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 |


### Trigintuple Calc

[App page](https://appshunter.io/ios/app/trigintuple-calc/id6742363481)

**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 Trigintuple Calc free?

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

### Do calculator DUO or Trigintuple Calc have ads?

Both calculator DUO and Trigintuple Calc show ads.

### Which is updated more often, calculator DUO or Trigintuple Calc?

calculator DUO ships an update every 10 days, and Trigintuple Calc every 2 weeks. Most recently, calculator DUO was updated on October 9, 2026 and Trigintuple Calc on October 14, 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.*