# Pypley vs LDM Valves

The clearest difference is price: LDM Valves at Free against Pypley's $2.99. Pypley's advantage is update cadence (every 3 weeks vs every 5 months) and iOS requirement (13.0 vs 15.3). On ads, in-app purchases and device support there is nothing between them.

LDM Valves is free to download; Pypley costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Pypley ships an update every 3 weeks, LDM Valves every 5 months. The most recent releases landed on October 20, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Pypley | LDM Valves |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/pypley/id1540444278/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | Paid | — |
| Size | 4 MB | 37 MB |
| Requires iOS | **13.0** | 15.3 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ali Mohammed](https://appshunter.io/developer/1540444280) | [LDM, spol. s r.o.](https://appshunter.io/developer/1807390383) |

## What reviewers say

### Pypley

[App page](https://appshunter.io/ios/app/pypley/id1540444278)

This app calculates flow rate, pressure drop, and pump performance for circular pipe systems. It supports custom pumps and fittings, and allows for unit conversions between Metric and US Imperial. Ideal for hydraulic and process engineers for early-stage design and quick estimations.

**Highlights:** Flow rate and pressure drop calculation, Customizable pump and fitting database, Metric/Imperial unit conversion, Pump performance curve plotting, Cavitation risk assessment (NPSH), Reynolds number and friction factor calculation

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### LDM Valves

[App page](https://appshunter.io/ios/app/ldm-valves/id6744373442)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pypley free?

Pypley costs $2.99, with no in-app purchases.

### Is LDM Valves free?

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

### Do Pypley or LDM Valves have ads?

Neither Pypley nor LDM Valves shows ads.

### Which is updated more often, Pypley or LDM Valves?

Pypley ships an update every 3 weeks, and LDM Valves every 5 months. Most recently, Pypley was updated on October 20, 2026 and LDM Valves on October 28, 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.*