# Davey Lifeguard vs Polytropic Pro

Davey Lifeguard and Polytropic Pro are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Davey Lifeguard | Polytropic Pro |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 12.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | — |
| Size | 45 MB | 251 MB |
| Requires iOS | **13.0** | 14.2 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Davey](https://appshunter.io/developer/1411704812) | [Polytropic](https://appshunter.io/developer/1613713281) |

## What reviewers say

### Davey Lifeguard

[App page](https://appshunter.io/ios/app/davey-lifeguard/id1465541045)

This application allows for remote monitoring and control of residential pool chemistry. Users can view water balance, adjust chemical levels, and receive real-time notifications about their pool's status and temperature. It also provides troubleshooting tips and recommendations for maintaining optimal water conditions.

**Highlights:** Remote pool chemistry monitoring, Adjust water balance and chemistry, Pre-set mode switching, Troubleshoot chemistry issues, Salt addition recommendations, Monitor pool temperature

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

**In-app purchases:** none


### Polytropic Pro

[App page](https://appshunter.io/ios/app/polytropic-pro/id6452721348)

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

**In-app purchases:** none


## Frequently asked questions

### Is Davey Lifeguard free?

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

### Is Polytropic Pro free?

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

### Do Davey Lifeguard or Polytropic Pro have ads?

Neither Davey Lifeguard nor Polytropic Pro shows ads.

### Which is updated more often, Davey Lifeguard or Polytropic Pro?

Davey Lifeguard ships an update every 3 months, and Polytropic Pro every 3 months. Most recently, Davey Lifeguard was updated on November 3, 2026 and Polytropic Pro on November 3, 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.*