# Dr. DE vs NESS Programmer

The clearest difference is update cadence: Dr. DE at every 3 months against NESS Programmer's every 21 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Dr. DE ships an update every 3 months, NESS Programmer every 21 months. The most recent releases landed on July 18, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Dr. DE | NESS Programmer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (16 ratings)](https://appshunter.io/ios/app/dr-de/id954796004/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 21 months |
| Monetization | Free | — |
| Size | 33 MB | 1 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Pegasus Vertex, Inc.](https://appshunter.io/developer/954796003) | [Iain Simpson](https://appshunter.io/developer/931621093) |

## 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


### NESS Programmer

[App page](https://appshunter.io/ios/app/ness-programmer/id1110819438)

**In-app purchases:** none


## Frequently asked questions

### Is Dr. DE free?

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

### Is NESS Programmer free?

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

### Do Dr. DE or NESS Programmer have ads?

Neither Dr. DE nor NESS Programmer shows ads.

### Which is updated more often, Dr. DE or NESS Programmer?

Dr. DE ships an update every 3 months, and NESS Programmer every 21 months. Most recently, Dr. DE was updated on July 18, 2026 and NESS Programmer on September 10, 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.*