OilField Formulas iHandy Calc vs Workstrings
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OilField Formulas iHandy Calc
This app provides essential hand calculations for oilfield specialists and petroleum engineers. It offers a comprehensive collection of formulas and tools for drilling, exploration, and mud engineering, aiming to simplify complex calculations.
- Oilfield and petroleum engineering formulas
- Drilling and exploration calculations
- Mud and cement calculations
- Capacities and volumes for downhole and tanks
- Pressure and gradient calculations
- Conversion factors and constants
- Acronyms and abbreviations
Read full descriptionHide full description
------- 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
Workstrings
Access and share detailed product specifications for a wide range of tubular goods and specialized joints. Easily search, view, and download spec sheets for items like drill pipe, landing string, and drill collars.
- Search product specifications
- View detailed spec sheets
- Download specification documents
- Share product information
- Browse tubular goods
- Access Worktech Joints specs
Read full descriptionHide full description
The Workstrings International Spec Sheet finder allows you to search for, view, download, and share specifications for a variety of Workstrings' products including Drill Pipe, Landing String, Heavy Weight Drill Pipe, Drill Collars, Tubing, Completion and Intervention Tubulars, and Worktech Joints
Screenshots
Verdict
The clearest difference is price: Workstrings at Free against OilField Formulas iHandy Calc's $1.99. Workstrings also leads on review sentiment (100% vs 67%) and update cadence (every 8 days vs every 6 months). OilField Formulas iHandy Calc's advantage is chart position (#194 vs unranked). On ads, in-app purchases and device support 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
Workstrings is free to download; OilField Formulas iHandy Calc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
OilField Formulas iHandy Calc ships an update every 6 months, Workstrings every 8 days. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.
| Parameter | OilField Formulas iHandy Calc | Workstrings |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | — | 5.0 (14 ratings) — better |
| Positive reviews | 66.7% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 14 — better |
| Update frequency | Every 6 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #194 — better | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 18.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 21 MB | 135 MB |
| Age rating | 4+ | 4+ |
| Developer | zhandos uakanov | SESI Holdings, Inc. |
Customer experience
OilField Formulas iHandy Calc
Workstrings
In-app purchases
OilField Formulas iHandy Calc
No in-app purchases
Workstrings
No in-app purchases
Questions
Is OilField Formulas iHandy Calc free?
Is Workstrings free?
Do OilField Formulas iHandy Calc or Workstrings have ads?
Which is updated more often, OilField Formulas iHandy Calc or Workstrings?
Other comparisons
