# Dr. DE vs CPC Utility

The clearest difference is review sentiment: CPC Utility at 100% against Dr. DE's 56%. CPC Utility also leads on rating (5.0 vs 4.5) and iOS requirement (13.0 vs 15.6). Dr. DE's advantage is update cadence (every 3 months vs every 12 months) and ratings volume (16 vs 3). On price, ads, in-app purchases and monetization model 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 4.5. That said, the two scores are not equally well evidenced: Dr. DE has 16 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 56% of Dr. DE's written reviews are positive against 100% of CPC Utility's.

Dr. DE ships an update every 3 months, CPC Utility every 12 months. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Dr. DE | CPC Utility |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (16 ratings)](https://appshunter.io/ios/app/dr-de/id954796004/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/cpc-utility/id1502728707/reviews)** |
| Number of ratings | **16** | 3 |
| Positive reviews | 55.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 12 months |
| Monetization | Free | Free |
| Size | 33 MB | 27 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Pegasus Vertex, Inc.](https://appshunter.io/developer/954796003) | [Thru Tubing Solutions Inc.](https://appshunter.io/developer/1502728706) |

## What reviewers say

### Dr. DE

[App page](https://appshunter.io/ios/app/dr-de/id954796004)

This mobile toolbox simplifies complex drilling engineering calculations. It offers a comprehensive suite of 29 functions across 11 categories, eliminating the need for handbooks and improving efficiency for engineers and technicians.

**Highlights:** 29 drilling engineering functions, 11 functional groups, Bit hydraulics calculations, Hole cleaning analysis, Well control solutions, Unit conversion tools, Tank capacity calculations

**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 Dr. DE free?

Dr. DE 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, Dr. DE or CPC Utility?

CPC Utility is rated higher. Dr. DE averages 4.5 out of 5 from 16 ratings, while CPC Utility averages 5.0 from 3 ratings.

### Do Dr. DE or CPC Utility have ads?

Neither Dr. DE nor CPC Utility shows ads.

### Which is updated more often, Dr. DE or CPC Utility?

Dr. DE ships an update every 3 months, and CPC Utility every 12 months. Most recently, Dr. DE 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.*