# ECO vs TREK Bio

The clearest difference is update cadence: ECO at every 3 days against TREK Bio's every 4 weeks. ECO also leads on iOS requirement (11.0 vs 15.0). 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.

ECO ships an update every 3 days, TREK Bio every 4 weeks. The most recent releases landed on November 11, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | ECO | TREK Bio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 weeks |
| Size | 10 MB | 18 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eco Plugs Enterprise Co., Ltd.](https://appshunter.io/developer/1483038462) | [Trek2000](https://appshunter.io/developer/409284633) |

## What reviewers say

### ECO

[App page](https://appshunter.io/ios/app/eco-tracker/id1448628015)

**Features:** macOS Compatibility

**In-app purchases:** none


### TREK Bio

[App page](https://appshunter.io/ios/app/trek-bio/id6444411830)

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

**In-app purchases:** none


## Frequently asked questions

### Is ECO free?

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

### Is TREK Bio free?

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

### Do ECO or TREK Bio have ads?

Neither ECO nor TREK Bio shows ads.

### Which is updated more often, ECO or TREK Bio?

ECO ships an update every 3 days, and TREK Bio every 4 weeks. Most recently, ECO was updated on November 11, 2026 and TREK Bio on November 12, 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.*