# Flow Rate Converter vs Deye ESS

The clearest difference is price: Deye ESS at Free against Flow Rate Converter's $0.99. Deye ESS also leads on update cadence (every 10 days vs every 7 months) and iOS requirement (13.0 vs 15.6). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Deye ESS 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.

On the App Store both sit at effectively the same score — 5.0 for Flow Rate Converter against 5.0 for Deye ESS. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Flow Rate Converter ships an update every 7 months, Deye ESS every 10 days. The most recent releases landed on October 19, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Flow Rate Converter | Deye ESS |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/flow-rate-converter/id668446877/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/deye-ess/id6746040947/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 10 days** |
| Monetization | Paid | **Free** |
| Size | 6 MB | 103 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Johan van der Vyver](https://appshunter.io/developer/668446880) | [萃绩科技(上海)有限公司](https://appshunter.io/developer/1738188942) |

## 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


### Deye ESS

[App page](https://appshunter.io/ios/app/deye-ess/id6746040947)

Manage your power station equipment throughout its lifecycle with smart, scenario-based energy storage. Features include real-time monitoring, efficient O&M, fault diagnosis, and a smart revenue calculator. Access nationwide electricity prices to optimize operations and maximize ROI.

**Highlights:** Full lifecycle equipment management, All-in-one O&M with fault diagnosis, AI-powered maintenance scheduling, Real-time equipment monitoring, Smart revenue calculator, Nationwide electricity price lookup

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

**In-app purchases:** none


## Frequently asked questions

### Is Flow Rate Converter free?

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

### Is Deye ESS free?

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

### Which has better reviews, Flow Rate Converter or Deye ESS?

Flow Rate Converter and Deye ESS are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Flow Rate Converter or Deye ESS have ads?

Neither Flow Rate Converter nor Deye ESS shows ads.

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

Flow Rate Converter ships an update every 7 months, and Deye ESS every 10 days. Most recently, Flow Rate Converter was updated on October 19, 2026 and Deye ESS on October 17, 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.*