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OilField Formulas iHandy Calc

by zhandos uakanov

  • Reference
  • Paid
View on the App Store
Rating
0.0
0 ratings
Top 97%among 235 Reference apps
Last update
Jan 23, 2026
Version 1.5
Size
22 MB
Category
Reference
Tracked since
Oct 10, 2026

Estimated revenue

A model estimate with a likely range, not a reported figure.

No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.

How this estimate is made

Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.

Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.

Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.

Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.

Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.

Full method

Screenshots

As shown on the App Store listing.

About this app

Text from the App Store listing.

------- Updated. Added more than 250 oilfield calculators -------

Aims of this application to make ease the life of Oilfield specialist and Petroleum, Mud Engineers by providing correct hand calculations. It is meant for Engineers,Specialist who are involved in Oil and Gas exploration and Drilling. This application is an essential supporting tool.

P.S.: Best way for correct calculation is the hand calculation.

Application builded by last updated API (American Petroleum Institute) Data.

-Capacities & Volumes for Downhole formulas
-Capacities & Volumes for Tanks formulas
-Pump Output & Rate
-Pump Press.Relationships
-Equivalent Circulating Density (ECD)
-Trip Calculations
-Pressure & Gradient
-Kill Sheet Calculations
-Kick Related
-Kick Related Engineering
-Volumetric Method calculation
-Lubricate & Bleed
-Bullheading Calculations
-Stripping/Snubbing
-Subsea
-Accumulator Sizing
-Mud & Cement
-Hydraulics
-Tripping Rules of Thumb
-Stuck Pipe
-Free Point & Stretch Estimates
-Estimating Temp. Drop Across a Choke or Orifice
-Bit Nozzle Pressure Loss
-Estimating Gas Well Flow Rates
-Area of a Circle
-Force & Pressure
-Weight of Spiral Drill Collar
-Buoyancy Factor (BF)
-Surface & Bottom Hole Pressure in Full Gas Column
-Pipe Elongation
and more formulas...

Also this app has:
-Coiled Tubing Stretch Table
-Mud Weights properties
-Acronyms & Abbreviations
-Conversion Factors
-Constants
-Drillpipe capacity and displacement
-Drill Collar Capacity and displacement
-Casing Capacity
-Hole Capacity
and more information…

Good Luck in Your Job!!!

----------------------
Other best oilfield apps in App Store:

  • Annular Volume Calculator;
  • Casing make-up Torque Chart;
  • Surge & Swab Pressure Calc;
  • PDC Bit & Drilling Calculator;
  • Kick Tolerance Calculator;
  • ASTM Tables: 54A, 54B, 54D;
  • and MORE...

----------------------

Follow us:
Instagram: @NationalOilfield
Facebook: @OilfieldTeam

What’s new

Release notes for the latest version, as written by the developer.

v1.5
Original · root
  • Updated all data as per API last release;

Rank history

Daily position in the US charts. #1 is at the top.

Best rank
#54
Current rank
#91
Days charting
6 of 7

On the charts today

Small & simple score

How realistic it is for a small team to build something like this.

75/100

Not flagged as small & simple

  • Developer size0% · 25

    Developer: 25 apps on the charts

  • Audience size100% · 20

    Ratings: 0

  • App size100% · 10

    Size: 22 MB

  • Price model100% · 15

    Price model: paid

  • Demand proof100% · 30

    Best rank #3, 16 countries

An indicator, not a fact. We can't see team size. Calculated Oct 24, 2026 · method i2

How the score works

Gap check · UK

Is this US chart app missing in UK?

Not verified yet

Store not checked yet

This is a candidate, not a verdict. Charts show at most 100 apps, so not charting does not mean no demand. Check the UK store before you decide.

See all gaps

Version history

  • 1.5LatestReleased Jan 23, 2026