PCalc vs Wait and Weight Method
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Optional RPN mode
- Multi-line display
- Extensive unit conversions
- Paper tape
- Multiple undo/redo
- Hexadecimal, octal, binary support
- 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. Includes an Apple Watch app, so you can calculate on your wrist!
Wait and Weight Method
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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
Verdict
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
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.
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.
| Parameter | PCalc | Wait and Weight Method |
|---|---|---|
| Price | $9.99 — better | $19.99 |
| Rating | 4.7 (770 ratings) — better | — |
| Positive reviews | 83.6% of reviews | — |
| Number of ratings | 770 — better | — |
| Update frequency | Every 6 weeks — better | Every 28 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Best chart rank | #95 — better | — |
| Devices | iPhone, iPad, iPod, Apple Watch, Vision Pro — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 81 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | TLA Systems Ltd. | Carlos Moura |
In-app purchases
PCalc
- Small Tip$0.99
- Medium Tip$1.99
- Large Tip$4.99
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- Enormous Tip$9.99
Wait and Weight Method
No in-app purchases
Questions
Is PCalc free?
Is Wait and Weight Method free?
Do PCalc or Wait and Weight Method have ads?
Which is updated more often, PCalc or Wait and Weight Method?
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