# Flow Rate Converter vs CoolDing

The clearest difference is price: CoolDing at Free against Flow Rate Converter's $0.99. CoolDing also leads on iOS requirement (5.1.1 vs 15.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

CoolDing is free to download; Flow Rate Converter costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Flow Rate Converter ships an update every 7 months, CoolDing every 9 months. The most recent releases landed on October 19, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Flow Rate Converter | CoolDing |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flow-rate-converter/id668446877/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 9 months |
| Monetization | Paid | — |
| Size | 6 MB | 39 MB |
| Requires iOS | 15.6 | **5.1.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Johan van der Vyver](https://appshunter.io/developer/668446880) | [Anna Technology B.V.](https://appshunter.io/developer/427593629) |

## What reviewers say

### Flow Rate Converter

[App page](https://appshunter.io/ios/app/flow-rate-converter/id668446877)

This utility app calculates flow rates in milliliters per hour based on substance concentration and dosage. It can also determine the required dosage for a set flow rate. Features a user-friendly interface and an iPad widget for quick calculations.

**Highlights:** Calculate flow rate in ml/h, Determine required dosage, User-friendly Picker interface, iPad widget for quick access, Specialized for concentration and dosage

**Features:** macOS Compatibility

**In-app purchases:** none


### CoolDing

[App page](https://appshunter.io/ios/app/coolding/id912132568)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flow Rate Converter free?

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

### Is CoolDing free?

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

### Do Flow Rate Converter or CoolDing have ads?

Neither Flow Rate Converter nor CoolDing shows ads.

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

Flow Rate Converter ships an update every 7 months, and CoolDing every 9 months. Most recently, Flow Rate Converter was updated on October 19, 2026 and CoolDing on October 12, 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.*