# eRMT vs Eco

The clearest difference is rating: Eco at 3.7 against eRMT's 2.2. Eco also leads on iOS requirement (11.0 vs 15.6). On price, review sentiment, ratings volume and ads there is nothing between them.

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

Eco holds the better App Store score, 3.7 against 2.2. Both are backed by a comparable volume of ratings — 6 and 9 respectively. Written reviews split almost evenly too, at 33% and 33% positive.

## The numbers

| Metric | eRMT | Eco |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.2 (6 ratings)](https://appshunter.io/ios/app/ermt/id6472037616/reviews) | **[3.7 (9 ratings)](https://appshunter.io/ios/app/eco-butler/id6503674864/reviews)** |
| Number of ratings | 6 | **9** |
| Positive reviews | 33.3% of reviews | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free | Free |
| Size | 42 MB | 178 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chongqing Moffy InnovationTechnology Co,Ltd](https://appshunter.io/developer/1716510724) | [YOUTO INFORMATION TECHNOLOGY COMPANY LIMITED](https://appshunter.io/developer/1749915187) |

## What reviewers say

### eRMT

[App page](https://appshunter.io/ios/app/ermt/id6472037616)

This app enhances respiratory muscle training with interactive games. It connects to a specialized trainer device via Bluetooth, allowing users to control in-game actions through breathing exercises. Designed for entertainment and training efficiency, it's intended for use with specific hardware.

**Highlights:** Connects to Sonmol/Nascool Respiratory Muscle Trainer, Bluetooth connectivity, Three interactive training games, Inhale/exhale controlled gameplay, Progress tracking for training efficiency, CE-certified and FDA-approved medical device integration

**In-app purchases:** none


### Eco

[App page](https://appshunter.io/ios/app/eco-butler/id6503674864)

Monitor your indoor air quality in real-time and receive alerts for filter replacement. Remotely control your air purifier's settings and view historical data to understand your environment. Contact customer service for support.

**Highlights:** Real-time indoor air quality monitoring, Historical air quality data browsing, Filter lifespan monitoring and replacement reminders, Remote control of device settings, Customizable schedules for device operation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is eRMT free?

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

### Is Eco free?

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

### Which has better reviews, eRMT or Eco?

Eco is rated higher. eRMT averages 2.2 out of 5 from 6 ratings, while Eco averages 3.7 from 9 ratings.

### Do eRMT or Eco have ads?

Neither eRMT nor Eco shows ads.

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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.*