# Dr. DE vs StallionVMS

The clearest difference is review sentiment: StallionVMS at 100% against Dr. DE's 56%. StallionVMS also leads on rating (5.0 vs 4.5) and iOS requirement (12.0 vs 15.6). Dr. DE's advantage is update cadence (every 3 months vs every 17 months) and ratings volume (15 vs 5). 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.

StallionVMS holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 15 and 5 respectively. Written reviews point the same way: 56% of Dr. DE's written reviews are positive against 100% of StallionVMS's.

Dr. DE ships an update every 3 months, StallionVMS every 17 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Dr. DE | StallionVMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (15 ratings)](https://appshunter.io/ios/app/dr-de/id954796004/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/stallionvms/id1572471179/reviews)** |
| Number of ratings | **15** | 5 |
| Positive reviews | 55.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 17 months |
| Monetization | Free | Free |
| Size | 33 MB | 42 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Pegasus Vertex, Inc.](https://appshunter.io/developer/954796003) | [Stallion Infrastructure Services LTD](https://appshunter.io/developer/1572471182) |

## 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


### StallionVMS

[App page](https://appshunter.io/ios/app/stallionvms/id1572471179)

Monitor surveillance cameras in real-time and review past footage. This system offers cloud storage and advanced analytics, including object detection for people and vehicles. Receive instant notifications for triggered events.

**Highlights:** Real-time camera monitoring, Review past events and archives, Cloud storage and analytics, Object detection (people, vehicles), Customizable event notifications, Bank-grade encryption

**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 StallionVMS free?

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

### Which has better reviews, Dr. DE or StallionVMS?

StallionVMS is rated higher. Dr. DE averages 4.5 out of 5 from 15 ratings, while StallionVMS averages 5.0 from 5 ratings.

### Do Dr. DE or StallionVMS have ads?

Neither Dr. DE nor StallionVMS shows ads.

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

Dr. DE ships an update every 3 months, and StallionVMS every 17 months. Most recently, Dr. DE was updated on October 24, 2026 and StallionVMS on October 24, 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.*