# Flow Rate Conversion vs Flow Rate Help

The clearest difference is rating: Flow Rate Help at 4.3 against Flow Rate Conversion's 3.0. Flow Rate Help also leads on ratings volume (44 vs 1) and price ($0.99 vs $2.99). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

Flow Rate Conversion costs $2.99 and Flow Rate Help $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Flow Rate Help holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: Flow Rate Help has 44 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.

Flow Rate Conversion ships an update every 29 months, Flow Rate Help every 15 months. The most recent releases landed on September 13, 2026 and August 6, 2026 respectively.

## The numbers

| Metric | Flow Rate Conversion | Flow Rate Help |
| --- | --- | --- |
| Price | $2.99 | **$0.99** |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/flow-rate-conversion/id525300855/reviews) | **[4.3 (44 ratings)](https://appshunter.io/ios/app/flow-rate-help/id1009898806/reviews)** |
| Number of ratings | 1 | **44** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 15 months** |
| Monetization | Paid | Paid |
| Size | 1 MB | 3 MB |
| Requires iOS | 13 | **11.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Armchair Engineering](https://appshunter.io/developer/398901339) |

## What reviewers say

### Flow Rate Conversion

[App page](https://appshunter.io/ios/app/flow-rate-conversion/id525300855)

Easily convert between various units of flow rate, including volume-based, mass-based, and mole-based measurements. Essential for physics and engineering applications involving fluid dynamics and hydrometry.

**Highlights:** Volume flow rate conversion, Mass flow rate conversion, Mole-based flow rate conversion, Physics and engineering utility, Fluid dynamics calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Flow Rate Conversion free?

Flow Rate Conversion costs $2.99, with no in-app purchases.

### Is Flow Rate Help free?

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

### Which has better reviews, Flow Rate Conversion or Flow Rate Help?

Flow Rate Help is rated higher. Flow Rate Conversion averages 3.0 out of 5 from 1 ratings, while Flow Rate Help averages 4.3 from 44 ratings.

### Do Flow Rate Conversion or Flow Rate Help have ads?

Neither Flow Rate Conversion nor Flow Rate Help shows ads.

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

Flow Rate Conversion ships an update every 29 months, and Flow Rate Help every 15 months. Most recently, Flow Rate Conversion was updated on September 13, 2026 and Flow Rate Help on August 6, 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.*