# Ordo vs A2O

The clearest difference is update cadence: Ordo at every 5 weeks against A2O's every 11 months. A2O's advantage is iOS requirement (13.0 vs 15.1). 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.

Ordo ships an update every 5 weeks, A2O every 11 months. The most recent releases landed on October 19, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Ordo | A2O |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/a2o/id6443875849/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 11 months |
| Monetization | — | Free |
| Size | 31 MB | 188 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Marrenco](https://appshunter.io/developer/1596793616) | [Aquaporin](https://appshunter.io/developer/1573920954) |

## What reviewers say

### Ordo

[App page](https://appshunter.io/ios/app/ordo/id1599246309)

**In-app purchases:** none


### A2O

[App page](https://appshunter.io/ios/app/a2o/id6443875849)

Manage your water purifier from your smartphone, track real-time water usage, and receive timely filter change reminders. Access product manuals and helpful water information.

**Highlights:** Connect and manage water purifier, Track real-time water usage, Filter change reminders, Maintenance guidance, Access product manuals, View purification effectiveness

**In-app purchases:** none


## Frequently asked questions

### Is Ordo free?

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

### Is A2O free?

A2O is free to download, with no in-app purchases.

### Do Ordo or A2O have ads?

Neither Ordo nor A2O shows ads.

### Which is updated more often, Ordo or A2O?

Ordo ships an update every 5 weeks, and A2O every 11 months. Most recently, Ordo was updated on October 19, 2026 and A2O on October 5, 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.*