PCalc Lite vs EnergInAI
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
Read full descriptionHide full description
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!
EnergInAI
Read full descriptionHide full description
EnergInAI is your all-in-one smart home energy monitor, designed to give you complete visibility and control over your electricity usage and solar production. Whether you want to lower your monthly bills or track your environmental impact, EnergInAI breaks down your complex energy data into simple, actionable insights. Key Features: • Real-Time Monitoring: See exactly how much power your home is consuming or exporting at any given moment. • Solar Generation Tracking: If you have solar panels, instantly track how much clean energy you are generating and using. • Cost Savings Calculator: Translate your energy data into real financial metrics so you know exactly how much money you are saving today. • Environmental Impact: Watch your CO₂ savings grow over time and see the equivalent number of trees you are saving. • Historical Trends: Dive into daily and monthly historical graphs to discover long-term usage patterns. Empower your home with smart energy management and start building a more sustainable future with EnergInAI!
Screenshots
Verdict
The clearest difference is in-app purchases: EnergInAI at none against PCalc Lite's 10. EnergInAI also leads on update cadence (every 3 weeks vs every 2 months). On price, ads, device support and iOS requirement 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 10 one-off in-app purchases. EnergInAI asks for nothing beyond the download.
PCalc Lite ships an update every 2 months, EnergInAI every 3 weeks. The most recent releases landed on October 31, 2026 and October 7, 2026 respectively.
| Parameter | PCalc Lite | EnergInAI |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (214 ratings) — better | — |
| Positive reviews | 82.5% of reviews | — |
| Number of ratings | 214 — better | — |
| Update frequency | Every 2 months | Every 3 weeks — better |
| 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 — better | 15.1 |
| Further details — not scored | ||
| Size | 79 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | TLA Systems Ltd. | EnergInAI |
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
EnergInAI
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
Show 7 moreShow fewer
- 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
EnergInAI
No in-app purchases









