# Drillstring Toolbox vs CPC Utility

The clearest difference is rating: CPC Utility at 5.0 against Drillstring Toolbox's 3.3. CPC Utility also leads on update cadence (every 12 months vs every 39 months). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CPC Utility holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Drillstring Toolbox ships an update every 39 months, CPC Utility every 12 months. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Drillstring Toolbox | CPC Utility |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/drillstring-toolbox/id1068605189/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/cpc-utility/id1502728707/reviews)** |
| Number of ratings | 3 | 3 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 12 months** |
| Monetization | Free | Free |
| Size | 1 MB | 27 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bureau Veritas North America, Inc.](https://appshunter.io/developer/1770295442) | [Thru Tubing Solutions Inc.](https://appshunter.io/developer/1502728706) |

## What reviewers say

### Drillstring Toolbox

[App page](https://appshunter.io/ios/app/drillstring-toolbox/id1068605189)

This utility app calculates drill-stem load capacities based on API connections and sizes. It also provides makeup torque and tensile capacity, as well as tensile and torsion capacities for drill pipe tubes.

**Highlights:** Drill-stem load capacity calculation, API connection selection, Makeup torque calculation, Tensile capacity calculation, Drill pipe tube capacities

**Features:** macOS Compatibility

**In-app purchases:** none


### CPC Utility

[App page](https://appshunter.io/ios/app/cpc-utility/id1502728707)

This utility app provides instant contact with well control services for emergencies. It also includes helpful calculators and lookup tables for casing, flange, coiled tubing, and nitrogen volume.

**Highlights:** 24/7 Well Control callout, Casing information lookup, Flange data, Coiled tubing calculator, Nitrogen volume calculator

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Drillstring Toolbox free?

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

### Is CPC Utility free?

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

### Which has better reviews, Drillstring Toolbox or CPC Utility?

CPC Utility is rated higher. Drillstring Toolbox averages 3.3 out of 5 from 3 ratings, while CPC Utility averages 5.0 from 3 ratings.

### Do Drillstring Toolbox or CPC Utility have ads?

Neither Drillstring Toolbox nor CPC Utility shows ads.

### Which is updated more often, Drillstring Toolbox or CPC Utility?

Drillstring Toolbox ships an update every 39 months, and CPC Utility every 12 months. Most recently, Drillstring Toolbox was updated on October 7, 2026 and CPC Utility on October 5, 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.*