# ROTHELEC vs Survoltage

The clearest difference is update cadence: Survoltage at monthly against ROTHELEC's every 5 months. Survoltage also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

ROTHELEC ships an update every 5 months, Survoltage monthly. The most recent releases landed on September 8, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | ROTHELEC | Survoltage |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free | — |
| Size | 220 MB | 41 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ROTHELEC](https://appshunter.io/developer/1828878226) | [Survoltage](https://appshunter.io/developer/1651266482) |

## What reviewers say

### ROTHELEC

[App page](https://appshunter.io/ios/app/rothelec/id1406340485)

Control your Rothelec eco-electric heating and smart home devices remotely. Adjust temperatures, schedule heating, and manage lights, blinds, and more from your smartphone or tablet for energy savings and convenience.

**Highlights:** Remote heating control, Room temperature adjustment, Customizable heating schedules, Smart home device management, Create equipment groups, Personalized automation scenarios, Local control during internet outages

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

**In-app purchases:** none


### Survoltage

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

**In-app purchases:** none


## Frequently asked questions

### Is ROTHELEC free?

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

### Is Survoltage free?

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

### Do ROTHELEC or Survoltage have ads?

Neither ROTHELEC nor Survoltage shows ads.

### Which is updated more often, ROTHELEC or Survoltage?

ROTHELEC ships an update every 5 months, and Survoltage monthly. Most recently, ROTHELEC was updated on September 8, 2026 and Survoltage on September 3, 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.*