# DP vs Dr. Hahn Instructions

The clearest difference is iOS requirement: Dr. Hahn Instructions at 11.0 against DP's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

DP ships an update every 16 months, Dr. Hahn Instructions every 15 months. The most recent releases landed on July 9, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | DP | Dr. Hahn Instructions |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/dp-select/id934888136/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 15 months** |
| Monetization | Free | — |
| Size | 15 MB | 18 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DP Pumps](https://appshunter.io/developer/934888135) | [Team Stiefelhagen Werbeagentur GmbH](https://appshunter.io/developer/1031243988) |

## What reviewers say

### DP

[App page](https://appshunter.io/ios/app/dp-select/id934888136)

This tool helps users configure and select DP pumps for their specific applications. It provides detailed product information, including technical specifications, hydraulic curves, and dimensions, based on your selection criteria.

**Highlights:** Intuitive product configuration, Selection via hydraulic data (Q, H), Replacement product comparison, Direct pump type selection, Technical specification sheets, Hydraulic curves, Dimensions and drawings

**In-app purchases:** none


### Dr. Hahn Instructions

[App page](https://appshunter.io/ios/app/dr-hahn-instructions/id1147190358)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DP free?

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

### Is Dr. Hahn Instructions free?

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

### Do DP or Dr. Hahn Instructions have ads?

Neither DP nor Dr. Hahn Instructions shows ads.

### Which is updated more often, DP or Dr. Hahn Instructions?

DP ships an update every 16 months, and Dr. Hahn Instructions every 15 months. Most recently, DP was updated on July 9, 2026 and Dr. Hahn Instructions on September 18, 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.*