PCalc Lite vs Fast Unit Convert
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PCalc Lite
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.
- Optional RPN mode
- Multiple undo and redo
- Unit conversions and constants
- Two stylish themes
- Apple Watch app
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PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody looking for a feature rich calculator. It includes an optional RPN mode and multi-line display, a choice of button layouts, an extensive set of unit conversions and constants, a paper tape, multiple undo and redo, engineering and scientific notation, as well as support for hexadecimal, octal, and binary calculations.PCalc Lite is a fully functional and free taste of our very popular scientific calculator. It includes an optional RPN mode, multiple undo and redo, unit conversions and constants, as well as two stylish themes and our highly praised design. A great choice for your new iPad! If you like what you see, the full version has many more settings and themes, a paper tape, engineering and scientific notation, and full support for hexadecimal, octal, and binary calculations. You can also now purchase extra features directly from inside PCalc Lite. Buy them individually, or buy everything. Includes an Apple Watch app, so you can calculate on your wrist!
Fast Unit Convert
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Fast Unit Convert is your all-in-one solution for quick and accurate unit conversions. Effortlessly convert between a wide variety of units including length, weight, temperature, volume, speed, and more—all in a clean, intuitive interface designed for speed and simplicity. Features: - Instantly convert between multiple unit categories - User-friendly virtual keyboard for fast input - Supports both simple and advanced conversion modes - Optimized for mobile devices with a modern, responsive design Whether you’re a student, professional, or just need to convert units on the go, Fast Unit Convert makes it easy and efficient. Download now and simplify your daily calculations!
Screenshots
Verdict
The clearest difference is price: PCalc Lite at Free against Fast Unit Convert's $0.59. Fast Unit Convert's advantage is in-app purchases (none vs 11) and iOS requirement (13.0 vs 15.0). On ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
PCalc Lite is free to download; Fast Unit Convert costs $0.59 up front. PCalc Lite sells 11 one-off in-app purchases. Fast Unit Convert asks for nothing beyond the download.
| Parameter | PCalc Lite | Fast Unit Convert |
|---|---|---|
| Price | Free — better | $0.59 |
| Rating | 4.4 (214 ratings) — better | — |
| Positive reviews | 82.6% of reviews | — |
| Number of ratings | 214 — better | — |
| Update frequency | Every 2 months | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 76 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | TLA Systems Ltd. | Rodolfo Goulart |
Bugs and requests
PCalc Lite
Reported bugs
3 issues- Calculations sometimes produce unexpected results
- Upside-down text censorship feature is problematic
- Purchased features not always accessible on Apple Watch
Requested features
4 requests- 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
Fast Unit Convert
Not enough reviews yet to summarise bugs or requests.
In-app purchases
PCalc Lite
- Theme Pack$0.99
- Power User Pack$0.99
- Multiple Line Pack$0.99
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- Conversion Pack$0.99
- Small Tip$0.99
- Medium Tip$1.99
- Programmer Pack$2.99
- Engineer Pack$2.99
- Large Tip$4.99
- Complete Pack$9.99
- Enormous Tip$9.99
Fast Unit Convert
No in-app purchases









