# Enel X Flex vs Hardness Conversion Master

The clearest difference is in-app purchases: Enel X Flex at none against Hardness Conversion Master's 1. Enel X Flex also leads on ads (none vs shown) and iOS requirement (15 vs 17.6). Hardness Conversion Master's advantage is update cadence (every 3 days vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Hardness Conversion Master sells 1 one-off in-app purchase. Enel X Flex asks for nothing beyond the download.

Enel X Flex ships an update every 2 months, Hardness Conversion Master every 3 days. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Enel X Flex | Hardness Conversion Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/enel-x-flex/id1196378509/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 26 MB | 259 MB |
| Requires iOS | **15** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Enel X srl](https://appshunter.io/developer/1377291788) | [POYU WANG](https://appshunter.io/developer/1883764660) |

## What reviewers say

### Enel X Flex

[App page](https://appshunter.io/ios/app/enel-x-flex/id1196378509)

Monitor energy usage and demand response events on your mobile device. View real-time performance metrics, track energy consumption trends, and access site-specific recommendations. This secure and intuitive application helps businesses optimize energy management.

**Highlights:** Demand response event notifications, Real-time dispatch monitoring, Energy usage trend monitoring, Site-specific recommendations, Interactive performance graphs, Energy reduction plan review

**Features:** Vision Pro support

**In-app purchases:** none


### Hardness Conversion Master

[App page](https://appshunter.io/ios/app/hardness-conversion-master/id6760411989)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | $1.99 | one-time |


## Frequently asked questions

### Is Enel X Flex free?

Enel X Flex is free to download, with no in-app purchases.

### Is Hardness Conversion Master free?

Hardness Conversion Master is free to download, with in-app purchases available.

### Do Enel X Flex or Hardness Conversion Master have ads?

Hardness Conversion Master shows ads; Enel X Flex does not.

### Which is updated more often, Enel X Flex or Hardness Conversion Master?

Enel X Flex ships an update every 2 months, and Hardness Conversion Master every 3 days. Most recently, Enel X Flex was updated on October 24, 2026 and Hardness Conversion Master on October 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*