# HT400 vs Mars Electric

The clearest difference is review sentiment: Mars Electric at 60% against HT400's 0%. HT400's advantage is update cadence (every 3 months vs every 22 months) and iOS requirement (8.0 vs 11.0). 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.

HT400 ships an update every 3 months, Mars Electric every 22 months. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | HT400 | Mars Electric |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/ht400/id1289067143/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | **60.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 22 months |
| Monetization | Free | Free |
| Size | 28 MB | 195 MB |
| Requires iOS | **8.0** | 11.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ISIPARK IC VE DIS TICARET INSAAT ISITMA SISTEMLERI OTOMOTIV SANAYI ANONIM SIRKETI](https://appshunter.io/developer/1289067142) | [MARS ELEKTRIK ITHALAT IHRACAT SANAYI VE TICARET ANONIM SIRKETI](https://appshunter.io/developer/1544938991) |

## What reviewers say

### HT400

[App page](https://appshunter.io/ios/app/ht400/id1289067143)

This smart thermostat app allows you to remotely control your home's temperature with precise accuracy. Save on energy bills by creating custom schedules and utilizing intelligent modes. Monitor historical data and manage multiple homes or family members from a single application.

**Highlights:** Remote temperature control worldwide, Daily/weekly program creation, Six distinct control modes, Location-based temperature adjustment, Historical heating reports, Multi-home and family sharing

**Features:** macOS Compatibility

**In-app purchases:** none


### Mars Electric

[App page](https://appshunter.io/ios/app/mars-electric/id1544938989)

Monitor and control your home's ambient temperature remotely with this smart thermostat app. Set custom schedules and adjust heating modes directly from your mobile device.

**Highlights:** Remote temperature monitoring, Humidity tracking, Customizable weekly schedules, Adjust heating device modes, Mobile control system

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HT400 free?

HT400 is free to download, with no in-app purchases.

### Is Mars Electric free?

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

### Do HT400 or Mars Electric have ads?

Neither HT400 nor Mars Electric shows ads.

### Which is updated more often, HT400 or Mars Electric?

HT400 ships an update every 3 months, and Mars Electric every 22 months. Most recently, HT400 was updated on October 6, 2026 and Mars Electric on October 14, 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.*