PCalc Lite vs Time Lines
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!
Time Lines
Easily track the time in different locations around the world. See when friends, family, or colleagues are available with a clear, visual overview. Syncs across devices and prioritizes your privacy.
- Global time tracking
- Sunrise and sunset alignment
- iCloud sync across devices
- Privacy-focused design
- Innovative line overview
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Time Lines is a practical app to know WHEN all your friends, colleagues, and family are. With a quick glance, you can check the time of the day anywhere in the world. * Sync across all your devices automatically with iCloud * Completely private - your data are yours only * Innovative line overview of the day, aligned with the sunrise and sunset
Screenshots
Verdict
The clearest difference is update cadence: Time Lines at weekly against PCalc Lite's every 2 months. Time Lines also leads on iOS requirement (13.0 vs 15.0). PCalc Lite's advantage is ratings volume (214 vs 8). On price, rating, review sentiment and ads 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
Both are free to download. PCalc Lite sells 11 one-off in-app purchases and Time Lines sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.4 for PCalc Lite against 4.5 for Time Lines. That said, the two scores are not equally well evidenced: PCalc Lite has 214 ratings behind it against 8, so its average is the more settled of the two. Written reviews are what separate them: 83% of PCalc Lite's written reviews are positive against 80% of Time Lines's.
PCalc Lite ships an update every 2 months, Time Lines weekly. The most recent releases landed on October 13, 2026 and October 3, 2026 respectively.
| Parameter | PCalc Lite | Time Lines |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (214 ratings) | 4.5 (8 ratings) — better |
| Positive reviews | 82.6% of reviews — better | 80.0% of reviews |
| Number of ratings | 214 — better | 8 |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Apple Watch | iPhone, iPad, iPod, Mac, Apple Watch — better |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 76 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | TLA Systems Ltd. | Mathieu Dutour |
Customer experience
PCalc Lite
Time Lines
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
Time Lines
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
Time Lines
- Unlimited ContactsFree
