# IoT EMS vs Composer Mobile

The clearest difference is update cadence: Composer Mobile at every 4 weeks against IoT EMS's every 2 months. Composer Mobile also leads on iOS requirement (11.0 vs 13). 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.

IoT EMS ships an update every 2 months, Composer Mobile every 4 weeks. The most recent releases landed on October 5, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | IoT EMS | Composer Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.6 (13 ratings)](https://appshunter.io/ios/app/composer-mobile/id1611422365/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | — | Free |
| Size | 25 MB | 45 MB |
| Requires iOS | 13 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ACREL CO.,LTD](https://appshunter.io/developer/1277572474) | [Telkonet, Inc](https://appshunter.io/developer/906021491) |

## What reviewers say

### IoT EMS

[App page](https://appshunter.io/ios/app/iot-ems/id1560302424)

**Features:** macOS Compatibility

**In-app purchases:** none


### Composer Mobile

[App page](https://appshunter.io/ios/app/composer-mobile/id1611422365)

Easily set up WiFi connectivity for your TouchCombo thermostat. Once connected, remotely control your device and manage its settings from your smartphone.

**Highlights:** WiFi setup for TouchCombo thermostats, Remote device control, Thermostat settings management, Smartphone integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IoT EMS free?

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

### Is Composer Mobile free?

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

### Do IoT EMS or Composer Mobile have ads?

Neither IoT EMS nor Composer Mobile shows ads.

### Which is updated more often, IoT EMS or Composer Mobile?

IoT EMS ships an update every 2 months, and Composer Mobile every 4 weeks. Most recently, IoT EMS was updated on October 5, 2026 and Composer Mobile on October 24, 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.*