# Flow Rate Help vs Imperial Converter

The clearest difference is update cadence: Imperial Converter at every 2 days against Flow Rate Help's every 15 months. Flow Rate Help's advantage is device support (4 vs 2) and iOS requirement (11.0 vs 17.6). On price, ads and in-app purchases there is nothing between them.

Flow Rate Help costs $0.99 and Imperial Converter $1.00 up front. Neither carries in-app purchases, so what you see is what you pay.

Flow Rate Help ships an update every 15 months, Imperial Converter every 2 days. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Flow Rate Help | Imperial Converter |
| --- | --- | --- |
| Price | **$0.99** | $1.00 |
| Rating | **[4.3 (44 ratings)](https://appshunter.io/ios/app/flow-rate-help/id1009898806/reviews)** | — |
| Number of ratings | **44** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 2 days** |
| Monetization | Paid | — |
| Size | 3 MB | 1 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Armchair Engineering](https://appshunter.io/developer/398901339) | [Aleksandr Skorniakov](https://appshunter.io/developer/1806965176) |

## What reviewers say

### Flow Rate Help

[App page](https://appshunter.io/ios/app/flow-rate-help/id1009898806)

Calculate liquid flow rate, pipe diameter, or velocity with ease. Customize units for diameter, velocity, and flow rate, and set your preferred decimal places for precise results.

**Highlights:** Solve flow rate equations, Customizable diameter units, Customizable velocity units, Customizable flow rate units, Set decimal places

**Features:** Vision Pro support

**In-app purchases:** none


### Imperial Converter

[App page](https://appshunter.io/ios/app/imperial-converter/id6744301267)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flow Rate Help free?

Flow Rate Help costs $0.99, with no in-app purchases.

### Is Imperial Converter free?

Imperial Converter costs $1.00, with no in-app purchases.

### Do Flow Rate Help or Imperial Converter have ads?

Neither Flow Rate Help nor Imperial Converter shows ads.

### Which is updated more often, Flow Rate Help or Imperial Converter?

Flow Rate Help ships an update every 15 months, and Imperial Converter every 2 days. Most recently, Flow Rate Help was updated on October 24, 2026 and Imperial Converter on October 19, 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.*