# YDOR Water Quality App vs e

The clearest difference is update cadence: e at every 2 weeks against YDOR Water Quality App's every 2 months. 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.

YDOR Water Quality App ships an update every 2 months, e every 2 weeks. The most recent releases landed on September 10, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | YDOR Water Quality App | e |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 33 MB | 33 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OTS SA](https://appshunter.io/developer/1204699086) | [PRIMER SOFTWARE P.C.](https://appshunter.io/developer/1604333837) |

## What reviewers say

### YDOR Water Quality App

[App page](https://appshunter.io/ios/app/ydor-water-quality-app/id1534100016)

**In-app purchases:** none


### e

[App page](https://appshunter.io/ios/app/e/id1604333835)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is YDOR Water Quality App free?

YDOR Water Quality App is free to download, with no in-app purchases.

### Is e free?

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

### Do YDOR Water Quality App or e have ads?

Neither YDOR Water Quality App nor e shows ads.

### Which is updated more often, YDOR Water Quality App or e?

YDOR Water Quality App ships an update every 2 months, and e every 2 weeks. Most recently, YDOR Water Quality App was updated on September 10, 2026 and e on September 7, 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.*