# PerfectCalc vs Duodecuple Calc

The clearest difference is in-app purchases: Duodecuple Calc at none against PerfectCalc's 1. PerfectCalc's advantage is iOS requirement (13 vs 15.8.3). On price, update cadence, ads and device support there is nothing between them.

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

PerfectCalc ships an update every 9 days, Duodecuple Calc every 2 weeks. The most recent releases landed on October 15, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | PerfectCalc | Duodecuple Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (360 ratings)](https://appshunter.io/ios/app/perfectcalc-calculator-suite/id1561702545/reviews)** | — |
| Number of ratings | **360** | — |
| Positive reviews | 94.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 77 MB | 36 MB |
| Requires iOS | **13** | 15.8.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [明星 王](https://appshunter.io/developer/1872854947) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### PerfectCalc

[App page](https://appshunter.io/ios/app/perfectcalc-calculator-suite/id1561702545)

This app offers both basic and advanced scientific calculations with a user-friendly interface. It allows for real-time editing of calculations, history management, and theme customization.

**Highlights:** Basic and scientific calculations, Trigonometric and inverse trigonometric functions, Mathematical functions (abs, ceil, floor, round), Real-time calculation editing, Historical records management, Bright and dark theme switching

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calculator Pro | $19.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Powerful features
- 💡 Useful history function
- 🔒 No ads
- 👍 Clean interface

**What reviewers complain about**

- 🐛 Forced 5-star review for history function
- 🐛 Odd language issue with copied calculations

**Reported bugs**

- Forced 5-star review for history function
- Odd language issue with copied calculations

**Requested features**

- Dark mode option
- More customization options


### 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 PerfectCalc free?

PerfectCalc 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 PerfectCalc or Duodecuple Calc have ads?

Both PerfectCalc and Duodecuple Calc show ads.

### Which is updated more often, PerfectCalc or Duodecuple Calc?

PerfectCalc ships an update every 9 days, and Duodecuple Calc every 2 weeks. Most recently, PerfectCalc was updated on October 15, 2026 and Duodecuple Calc on October 10, 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.*