# T vs Eco

The clearest difference is rating: Eco at 3.7 against T's 1.6. Eco also leads on review sentiment (33% vs 0%) and iOS requirement (11.0 vs 15.6). On price, ratings volume, ads and in-app purchases 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 1.6. Both are backed by a comparable volume of ratings — 9 and 9 respectively. Written reviews point the same way: 0% of T's written reviews are positive against 33% of Eco's.

## The numbers

| Metric | T | Eco |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (9 ratings)](https://appshunter.io/ios/app/t-meter/id1566693372/reviews) | **[3.7 (9 ratings)](https://appshunter.io/ios/app/eco-butler/id6503674864/reviews)** |
| Number of ratings | 9 | 9 |
| Positive reviews | 0.0% of reviews | **33.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Free | Free |
| Size | 24 MB | 178 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hangzhou Dashi Wisdom Technology Co., Ltd.](https://appshunter.io/developer/1822219570) | [YOUTO INFORMATION TECHNOLOGY COMPANY LIMITED](https://appshunter.io/developer/1749915187) |

## What reviewers say

### T

[App page](https://appshunter.io/ios/app/t-meter/id1566693372)

Monitor your oil tank's level remotely from your smartphone. Track heating oil usage with hourly charts and receive custom low-level alerts via email and text.

**Highlights:** Remote tank level monitoring, Hourly usage charts, Customizable low-level alarms, Email and text notifications, Usage history by day, week, month, year

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

**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 T free?

T 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, T or Eco?

Eco is rated higher. T averages 1.6 out of 5 from 9 ratings, while Eco averages 3.7 from 9 ratings.

### Do T or Eco have ads?

Neither T 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.*