Comparison

PCalc vs Wait and Weight Method

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

Head to head
About

PCalc

A powerful calculator designed for professionals and students, offering advanced features like RPN mode, multi-line display, and extensive unit conversions. It supports various number systems and includes an Apple Watch app for on-the-go calculations.

Highlights
  • Optional RPN mode
  • Multi-line display
  • Extensive unit conversions
  • Paper tape
  • Multiple undo/redo
  • Hexadecimal, octal, binary support
  • Apple Watch app
Features
Currently charting
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. Includes an Apple Watch app, so you can calculate on your wrist!

About

Wait and Weight Method

Features
Read full description

This app is designed for both iPhone and iPad. This application uses the basic calculations of the "Wait and Weight" method to control oil wells after the occurrence of kick during drilling operations on floating platforms and landing rigs. It is an useful tool to import data files to fill kill sheets from our apps: (Driling Hydraulics, Drilling Simulator, Kick Game, Kick Tolerance, LOT Simulator, MPD Simulator and Well Control Simulator) available for sale in our portfolio on the App Store. It is can be applied on the field and also help in the understanding of the "Wait and Weight" method for well control. This app was developed based on existing spreadsheets. There is no comparison with any other software. Our goal was to create a low-cost application with the help of experts to share with drilling engineers, technicians, drillers, students and teachers of drilling engineering. There is no intention to replace the professional softwares. You can contribute with suggestions for improvements, correcting the translation to english, reporting bugs and spreading it to your friends. Thanks DISCLAIMER: These tools & materials are provided 'as is' without warranties of any kind, express or implied. Please verify the tools provided by this application by yourself before you use them. Ensure you understand the impact of using these tools. Any use you choose to make of these tools & materials is undertaken by you entirely at your own risk.

Screenshots

PCalc4 screens
Wait and Weight Method4 screens

Verdict

The call

The clearest difference is price: PCalc at $9.99 against Wait and Weight Method's $19.99. PCalc also leads on update cadence (every 6 weeks vs every 28 months) and chart position (#95 vs unranked). Wait and Weight Method's advantage is in-app purchases (none vs 4). On ads 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

PCalc costs $9.99 and Wait and Weight Method $19.99 up front. PCalc sells 4 one-off in-app purchases. Wait and Weight Method asks for nothing beyond the download.

UpkeepUpdate frequency

PCalc ships an update every 6 weeks, Wait and Weight Method every 28 months. The most recent releases landed on October 13, 2026 and October 2, 2026 respectively.

Scorecard5 real differences · 6 level
PCalc versus Wait and Weight Method: the parameters behind the verdict, then further details
ParameterPCalcWait and Weight Method
Price$9.99 — better$19.99
Rating4.7 (770 ratings) — better—
Positive reviews83.6% of reviews—
Number of ratings770 — better—
Update frequencyEvery 6 weeks — betterEvery 28 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#95 — better—
DevicesiPhone, iPad, iPod, Apple Watch, Vision Pro — betteriPhone, iPad, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size81 MB17 MB
Age rating4+4+
DeveloperTLA Systems Ltd.Carlos Moura

In-app purchases

4 purchases

PCalc

One-time4
  • Small Tip$0.99
  • Medium Tip$1.99
  • Large Tip$4.99
Show 1 more
  • Enormous Tip$9.99
None

Wait and Weight Method

No in-app purchases

Questions

Is PCalc free?
PCalc costs $9.99, and also offers in-app purchases.
Is Wait and Weight Method free?
Wait and Weight Method costs $19.99, with no in-app purchases.
Do PCalc or Wait and Weight Method have ads?
Neither PCalc nor Wait and Weight Method shows ads.
Which is updated more often, PCalc or Wait and Weight Method?
PCalc ships an update every 6 weeks, and Wait and Weight Method every 28 months. Most recently, PCalc was updated on October 13, 2026 and Wait and Weight Method on October 2, 2026.

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