# HT400 vs Solinved IoT

The clearest difference is update cadence: Solinved IoT at every 10 days against HT400's every 3 months. HT400's advantage is iOS requirement (8.0 vs 13.0). 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.

HT400 ships an update every 3 months, Solinved IoT every 10 days. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | HT400 | Solinved IoT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/ht400/id1289067143/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 28 MB | 73 MB |
| Requires iOS | **8.0** | 13.0 |
| 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) | [ALKA SOLAR ENERJI MUHENDISLIK SANAYI VE TICARET LIMITED SIRKETI](https://appshunter.io/developer/1822285850) |

## 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


### Solinved IoT

[App page](https://appshunter.io/ios/app/solinved-iot/id6751835706)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HT400 free?

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

### Is Solinved IoT free?

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

### Do HT400 or Solinved IoT have ads?

Neither HT400 nor Solinved IoT shows ads.

### Which is updated more often, HT400 or Solinved IoT?

HT400 ships an update every 3 months, and Solinved IoT every 10 days. Most recently, HT400 was updated on October 23, 2026 and Solinved IoT on October 25, 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.*