# Calculation Pad vs Duodecuple Calc

The clearest difference is in-app purchases: Duodecuple Calc at none against Calculation Pad's 5. Calculation Pad's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.8.3). On price, update cadence and device support there is nothing between them.

Both are free to download. Calculation Pad sells 5 one-off in-app purchases. Duodecuple Calc asks for nothing beyond the download.

Calculation Pad ships an update fortnightly, Duodecuple Calc every 2 weeks. The most recent releases landed on October 5, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Calculation Pad | Duodecuple Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calculation-pad/id1473259620/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 3 MB | 36 MB |
| Requires iOS | **13.0** | 15.8.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yukio Tajima](https://appshunter.io/developer/1473259619) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### Calculation Pad

[App page](https://appshunter.io/ios/app/calculation-pad/id1473259620)

This calculator app keeps a history of your calculations, allowing you to easily reuse past results. It offers enhanced security features like fingerprint or password protection for sensitive data. Despite its advanced functionality, it remains free to use.

**Highlights:** Calculation history, Reuse past calculations, Add taxes, Fingerprint/password/face protection, Free to use

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Developer Support | $0.99 | one-time |
| Small tip | $0.99 | one-time |
| Medium tip | $3.99 | one-time |
| Developer Support | $6.99 | one-time |
| Large tip | $6.99 | one-time |


### Duodecuple Calc

[App page](https://appshunter.io/ios/app/duodecuple-calc/id6742208421)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculation Pad free?

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

### Is Duodecuple Calc free?

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

### Do Calculation Pad or Duodecuple Calc have ads?

Duodecuple Calc shows ads; Calculation Pad does not.

### Which is updated more often, Calculation Pad or Duodecuple Calc?

Calculation Pad ships an update fortnightly, and Duodecuple Calc every 2 weeks. Most recently, Calculation Pad was updated on October 5, 2026 and Duodecuple Calc on September 23, 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.*