Comparison

Wait and Weight Method vs ECD Calculator

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

Head to head
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.

About

ECD Calculator

This utility app assists drilling and mud engineers in calculating Equivalent Circulating Density (ECD) at any point during operations. It offers a streamlined process with just a few clicks.

Highlights
  • ECD calculation
  • Drilling engineering
  • Mud engineering
  • Point-of-operation calculation
  • Streamlined interface
Features
Read full description

ECD calculator help drilling and mud engineers calculate the ECD at any point with a few click

Screenshots

Wait and Weight Method4 screens
ECD Calculator4 screens

Verdict

The call

The clearest difference is price: ECD Calculator at Free against Wait and Weight Method's $19.99. ECD Calculator also leads on update cadence (every 5 days vs every 28 months). Wait and Weight Method's advantage is in-app purchases (none vs 2). On 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

ECD Calculator is free to download; Wait and Weight Method costs $19.99 up front. ECD Calculator sells 2 one-off in-app purchases. Wait and Weight Method asks for nothing beyond the download.

UpkeepUpdate frequency

Wait and Weight Method ships an update every 28 months, ECD Calculator every 5 days. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 7 level
Wait and Weight Method versus ECD Calculator: the parameters behind the verdict, then further details
ParameterWait and Weight MethodECD Calculator
Price$19.99Free — better
Rating—5.0 (5 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—5 — better
Update frequencyEvery 28 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size17 MB45 MB
Age rating4+17+
DeveloperCarlos MouraDrillsoft LLC

In-app purchases

None

Wait and Weight Method

No in-app purchases

2 purchases

ECD Calculator

One-time2
  • 50 credits$3.99
  • 300 Credits$9.99

Questions

Is Wait and Weight Method free?
Wait and Weight Method costs $19.99, with no in-app purchases.
Is ECD Calculator free?
ECD Calculator is free to download, with in-app purchases available.
Do Wait and Weight Method or ECD Calculator have ads?
Neither Wait and Weight Method nor ECD Calculator shows ads.
Which is updated more often, Wait and Weight Method or ECD Calculator?
Wait and Weight Method ships an update every 28 months, and ECD Calculator every 5 days. Most recently, Wait and Weight Method was updated on October 2, 2026 and ECD Calculator on October 6, 2026.

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