# JUNG PUMPEN PumpSizer vs Crassus

The clearest difference is iOS requirement: JUNG PUMPEN PumpSizer at 7.1 against Crassus's 15.1. 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.

JUNG PUMPEN PumpSizer ships an update every 8 months, Crassus every 15 months. The most recent releases landed on October 23, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | JUNG PUMPEN PumpSizer | Crassus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/jung-pumpen-pumpsizer/id339770871/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 15 months |
| Monetization | Free | — |
| Size | 24 MB | 76 MB |
| Requires iOS | **7.1** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [cybob communication GmbH](https://appshunter.io/developer/335748880) | [Crassus GmbH & Co. KG](https://appshunter.io/developer/1475104093) |

## What reviewers say

### JUNG PUMPEN PumpSizer

[App page](https://appshunter.io/ios/app/jung-pumpen-pumpsizer/id339770871)

This app helps users select the right wastewater pump for their specific needs. It guides you through defining hydraulic data, medium, and installation location to find suitable pumps and view their performance curves.

**Highlights:** Intuitive pump selection process, Define application profiles, Specify hydraulic data, medium, and installation location, View pump characteristic curves, Selection list of drainage fixtures, Multimedia product information

**In-app purchases:** none


### Crassus

[App page](https://appshunter.io/ios/app/crassus/id538410244)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JUNG PUMPEN PumpSizer free?

JUNG PUMPEN PumpSizer is free to download, with no in-app purchases.

### Is Crassus free?

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

### Do JUNG PUMPEN PumpSizer or Crassus have ads?

Neither JUNG PUMPEN PumpSizer nor Crassus shows ads.

### Which is updated more often, JUNG PUMPEN PumpSizer or Crassus?

JUNG PUMPEN PumpSizer ships an update every 8 months, and Crassus every 15 months. Most recently, JUNG PUMPEN PumpSizer was updated on October 23, 2026 and Crassus on October 4, 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.*