# Know My Water Pro vs Atlios

The clearest difference is update cadence: Atlios at every 3 weeks against Know My Water Pro's every 2 months. Know My Water Pro's advantage is iOS requirement (13.0 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.

Know My Water Pro ships an update every 2 months, Atlios every 3 weeks. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Know My Water Pro | Atlios |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 17 MB | 9 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Know My Well, LLC](https://appshunter.io/developer/1582657666) | [Atlios, LLC](https://appshunter.io/developer/1876980664) |

## What reviewers say

### Know My Water Pro

[App page](https://appshunter.io/ios/app/know-my-water-pro/id6451447960)

**Features:** macOS Compatibility

**In-app purchases:** none


### Atlios

[App page](https://appshunter.io/ios/app/atlios/id6759118421)

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

**In-app purchases:** none


## Frequently asked questions

### Is Know My Water Pro free?

Know My Water Pro is free to download, with no in-app purchases.

### Is Atlios free?

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

### Do Know My Water Pro or Atlios have ads?

Neither Know My Water Pro nor Atlios shows ads.

### Which is updated more often, Know My Water Pro or Atlios?

Know My Water Pro ships an update every 2 months, and Atlios every 3 weeks. Most recently, Know My Water Pro was updated on November 3, 2026 and Atlios on October 28, 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.*