# Survoltage vs Hydrao Eco

The clearest difference is update cadence: Hydrao Eco at weekly against Survoltage's monthly. Survoltage's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Survoltage ships an update monthly, Hydrao Eco weekly. The most recent releases landed on October 21, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Survoltage | Hydrao Eco |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/survoltage/id6443993237/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free | Free |
| Size | 41 MB | 28 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Survoltage](https://appshunter.io/developer/1651266482) | [SMART AND BLUE](https://appshunter.io/developer/1096518405) |

## What reviewers say

### Survoltage

[App page](https://appshunter.io/ios/app/survoltage/id6443993237)

This app helps households reduce electricity bills and carbon footprints by optimizing energy consumption. It allows users to track usage, participate in challenges to earn rewards, and understand the French electrical grid's status. Connect smart devices for automatic participation.

**Highlights:** Track detailed electricity consumption, Participate in savings challenges, Earn EWATT points convertible to Euros, Connect smart home devices, Receive grid tension notifications, Understand French electrical grid status

**In-app purchases:** none


### Hydrao Eco

[App page](https://appshunter.io/ios/app/hydrao-eco/id6753078584)

This app gamifies water saving by tracking your shower consumption. Set custom thresholds and colors to monitor progress, evaluate savings on water and heating, and manage multiple shower heads.

**Highlights:** Track shower water consumption, Gamified water saving, Set water thresholds and colors, Monitor water and heating savings, Manage multiple shower heads, Compare performance and progress

**In-app purchases:** none


## Frequently asked questions

### Is Survoltage free?

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

### Is Hydrao Eco free?

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

### Do Survoltage or Hydrao Eco have ads?

Neither Survoltage nor Hydrao Eco shows ads.

### Which is updated more often, Survoltage or Hydrao Eco?

Survoltage ships an update monthly, and Hydrao Eco weekly. Most recently, Survoltage was updated on October 21, 2026 and Hydrao Eco on October 11, 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.*