# Pump Rate Calculator vs Dr. DE

The clearest difference is iOS requirement: Pump Rate Calculator at 13.0 against Dr. DE's 15.6. On price, review sentiment, update cadence 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.

Pump Rate Calculator ships an update every 2 months, Dr. DE every 3 months. The most recent releases landed on October 2, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Pump Rate Calculator | Dr. DE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (15 ratings)](https://appshunter.io/ios/app/dr-de/id954796004/reviews)** |
| Number of ratings | — | **15** |
| Positive reviews | 50.0% of reviews | **55.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | Free |
| Size | 3 MB | 33 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Ash Point Ltd.](https://appshunter.io/developer/567630274) | [Pegasus Vertex, Inc.](https://appshunter.io/developer/954796003) |

## What reviewers say

### Pump Rate Calculator

[App page](https://appshunter.io/ios/app/pump-rate-calculator/id567630271)

This utility app helps oilfield professionals quickly calculate pump rates, volume pumped, and time spent pumping. Simply input the pump coefficient and tap along with the pump strokes for instant results.

**Highlights:** Calculate pump rate, Calculate volume pumped, Calculate time pumping, Track time started, Input pump coefficient

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Pump Rate Calculator free?

Pump Rate Calculator is free to download, with no in-app purchases.

### Is Dr. DE free?

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

### Do Pump Rate Calculator or Dr. DE have ads?

Neither Pump Rate Calculator nor Dr. DE shows ads.

### Which is updated more often, Pump Rate Calculator or Dr. DE?

Pump Rate Calculator ships an update every 2 months, and Dr. DE every 3 months. Most recently, Pump Rate Calculator was updated on October 2, 2026 and Dr. DE 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.*