# Pypley vs TSI Flowmeter

The clearest difference is price: TSI Flowmeter at Free against Pypley's $2.99. Pypley's advantage is iOS requirement (13.0 vs 16.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

TSI Flowmeter 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, TSI Flowmeter monthly. The most recent releases landed on October 8, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Pypley | TSI Flowmeter |
| --- | --- | --- |
| 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** | Monthly |
| Monetization | Paid | — |
| Size | 4 MB | 51 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ali Mohammed](https://appshunter.io/developer/1540444280) | [TSI Flowmeters Ltd](https://appshunter.io/developer/1578495651) |

## 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


### TSI Flowmeter

[App page](https://appshunter.io/ios/app/tsi-flowmeter/id1578495648)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pypley free?

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

### Is TSI Flowmeter free?

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

### Do Pypley or TSI Flowmeter have ads?

Neither Pypley nor TSI Flowmeter shows ads.

### Which is updated more often, Pypley or TSI Flowmeter?

Pypley ships an update every 3 weeks, and TSI Flowmeter monthly. Most recently, Pypley was updated on October 8, 2026 and TSI Flowmeter on October 20, 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.*