# Oklyn vs Evergreen33

The clearest difference is ads: Oklyn at none against Evergreen33's shown. Oklyn also leads on update cadence (every 2 months vs every 14 months) and iOS requirement (13.0 vs 15.0). On price, 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.

Oklyn ships an update every 2 months, Evergreen33 every 14 months. The most recent releases landed on October 14, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Oklyn | Evergreen33 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 14 months |
| Monetization | Free | — |
| Size | 20 MB | 52 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Tuxtla SAS](https://appshunter.io/developer/1679953492) | [Lambert Elric](https://appshunter.io/developer/1563370278) |

## What reviewers say

### Oklyn

[App page](https://appshunter.io/ios/app/oklyn/id1364957029)

This app connects to a smart pool device to monitor water quality, optimize filtration, and automate pool maintenance. It allows remote control of pool equipment and provides real-time data and historical analysis for efficient pool care.

**Highlights:** Water quality analysis (pH, RedOx, Temp), Filtration optimization, Automated active winterization, Maintenance advice, Remote pool equipment control, Leak detection in technical room

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

**In-app purchases:** none


### Evergreen33

[App page](https://appshunter.io/ios/app/evergreen33/id1563370276)

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

**In-app purchases:** none


## Frequently asked questions

### Is Oklyn free?

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

### Is Evergreen33 free?

Evergreen33 is free to download, with no in-app purchases.

### Do Oklyn or Evergreen33 have ads?

Evergreen33 shows ads; Oklyn does not.

### Which is updated more often, Oklyn or Evergreen33?

Oklyn ships an update every 2 months, and Evergreen33 every 14 months. Most recently, Oklyn was updated on October 14, 2026 and Evergreen33 on October 6, 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.*