Comparison

PCalc Lite vs EnergInAI

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Optional RPN mode
  • Multiple undo and redo
  • Unit conversions and constants
  • Two stylish themes
  • Apple Watch app
Features
Read 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!

About

EnergInAI

Features
Read 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

PCalc Lite4 screens
EnergInAI4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
PCalc Lite versus EnergInAI: the parameters behind the verdict, then further details
ParameterPCalc LiteEnergInAI
PriceFreeFree
Rating4.4 (214 ratings) — better—
Positive reviews82.5% of reviews—
Number of ratings214 — better—
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size79 MB43 MB
Age rating4+4+
DeveloperTLA 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

10 purchases

PCalc Lite

One-time10
  • Theme Pack$0.99
  • Power User Pack$0.99
  • Multiple Line Pack$0.99
Show 7 more
  • 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
None

EnergInAI

No in-app purchases

Questions

Is PCalc Lite free?
PCalc Lite is free to download, with in-app purchases available.
Is EnergInAI free?
EnergInAI is free to download, with no in-app purchases.
Do PCalc Lite or EnergInAI have ads?
Neither PCalc Lite nor EnergInAI shows ads.
Which is updated more often, PCalc Lite or EnergInAI?
PCalc Lite ships an update every 2 months, and EnergInAI every 3 weeks. Most recently, PCalc Lite was updated on October 31, 2026 and EnergInAI on October 7, 2026.

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