# PCalc Lite vs Duodecuple Calc

The clearest difference is in-app purchases: Duodecuple Calc at none against PCalc Lite's 10. Duodecuple Calc also leads on update cadence (every 2 weeks vs every 2 months). PCalc Lite's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. PCalc Lite sells 10 one-off in-app purchases. Duodecuple Calc asks for nothing beyond the download.

PCalc Lite ships an update every 2 months, Duodecuple Calc every 2 weeks. The most recent releases landed on October 31, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | PCalc Lite | Duodecuple Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (214 ratings)](https://appshunter.io/ios/app/pcalc-lite/id300311831/reviews)** | — |
| Number of ratings | **214** | — |
| Positive reviews | 82.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 79 MB | 36 MB |
| Requires iOS | **15.0** | 15.8.3 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TLA Systems Ltd.](https://appshunter.io/developer/284666225) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### PCalc Lite

[App page](https://appshunter.io/ios/app/pcalc-lite/id300311831)

This free scientific calculator offers essential features like RPN mode, unit conversions, and multiple undo/redo. It provides a taste of a more powerful version, with optional in-app purchases for expanded functionality.

**Highlights:** Optional RPN mode, Multiple undo and redo, Unit conversions and constants, Two stylish themes, Apple Watch app

**Features:** Family Sharing, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Theme Pack | $0.99 | one-time |
| Power User Pack | $0.99 | one-time |
| Multiple Line Pack | $0.99 | one-time |
| Conversion Pack | $0.99 | one-time |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Programmer Pack | $2.99 | one-time |
| Engineer Pack | $2.99 | one-time |
| Large Tip | $4.99 | one-time |
| Complete Pack | $9.99 | one-time |

**What reviewers like**

- 🚀 Fast and responsive
- 👍 Clean and intuitive interface
- 💡 Customizable themes and settings
- 🚀 Efficient performance
- 👍 Useful conversion tools

**What reviewers complain about**

- 🐛 Occasional lags and crashes
- 🔒 Lack of dark mode support
- 🔒 Inconsistent icon appearance after upgrades
- 🔒 Limitations in RPN mode on Apple Watch
- 🔒 Lack of financial calculator functions

**Reported bugs**

- Calculations sometimes produce unexpected results
- Upside-down text censorship feature is problematic
- Purchased features not always accessible on Apple Watch

**Requested features**

- Add option to display thousands separators
- Implement a history function to review past calculations
- Provide more customization options for the widget
- Add support for sexagesimal angle input and conversion


### 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 PCalc Lite free?

PCalc Lite 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 PCalc Lite or Duodecuple Calc have ads?

Duodecuple Calc shows ads; PCalc Lite does not.

### Which is updated more often, PCalc Lite or Duodecuple Calc?

PCalc Lite ships an update every 2 months, and Duodecuple Calc every 2 weeks. Most recently, PCalc Lite was updated on October 31, 2026 and Duodecuple Calc on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*