# OilField Formulas iHandy Calc vs Workstrings

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.

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.

## The numbers

| Metric | OilField Formulas iHandy Calc | Workstrings |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[5.0 (14 ratings)](https://appshunter.io/ios/app/workstrings/id6740924535/reviews)** |
| Number of ratings | — | **14** |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 8 days** |
| Monetization | Paid | **Free** |
| Best chart rank | **#194** | — |
| Size | 21 MB | 135 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [zhandos uakanov](https://appshunter.io/developer/625286817) | [SESI Holdings, Inc.](https://appshunter.io/developer/1777501957) |

## What reviewers say

### OilField Formulas iHandy Calc

[App page](https://appshunter.io/ios/app/oilfield-formulas-ihandy-calc/id875486327)

**Currently charting:** #194 Top Paid · Reference (US App Store)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Workstrings

[App page](https://appshunter.io/ios/app/workstrings/id6740924535)

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.

**Highlights:** Search product specifications, View detailed spec sheets, Download specification documents, Share product information, Browse tubular goods, Access Worktech Joints specs

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OilField Formulas iHandy Calc free?

OilField Formulas iHandy Calc costs $1.99, with no in-app purchases.

### Is Workstrings free?

Workstrings is free to download, with no in-app purchases.

### Do OilField Formulas iHandy Calc or Workstrings have ads?

Neither OilField Formulas iHandy Calc nor Workstrings shows ads.

### Which is updated more often, OilField Formulas iHandy Calc or Workstrings?

OilField Formulas iHandy Calc ships an update every 6 months, and Workstrings every 8 days. Most recently, OilField Formulas iHandy Calc was updated on October 8, 2026 and Workstrings on October 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*