# WaterGuru vs MRCOOL Connect

The clearest difference is ads: WaterGuru at none against MRCOOL Connect's shown. MRCOOL Connect's advantage is update cadence (every 4 days vs every 4 weeks) 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.

WaterGuru ships an update every 4 weeks, MRCOOL Connect every 4 days. The most recent releases landed on October 20, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | WaterGuru | MRCOOL Connect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (238 ratings)](https://appshunter.io/ios/app/waterguru/id1372295527/reviews)** | — |
| Number of ratings | **238** | — |
| Positive reviews | 73.8% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | **Every 4 days** |
| Monetization | Free | — |
| Size | 155 MB | 199 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [WaterGuru, Inc](https://appshunter.io/developer/1153080819) | [HVAC Distributing LLC](https://appshunter.io/developer/1080526865) |

## What reviewers say

### WaterGuru

[App page](https://appshunter.io/ios/app/waterguru/id1372295527)

This app provides comprehensive control over your pool's water chemistry. It helps maintain a safe environment by keeping out harmful contaminants and offers lab-grade analysis and treatment advice for simplified pool management.

**Highlights:** Pool water chemistry control, Harmful virus and bacteria prevention, Lab-grade analysis, Water treatment advice, Simplified pool management

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💰 Money saver
- 🔍 Accurate readings
- 🕰️ Convenient daily monitoring
- 👨‍💻 Excellent customer service
- 🔧 Easy to use

**What reviewers complain about**

- 🐛 Connectivity issues
- 🔋 Battery drain
- 🤖 Inaccurate readings for some parameters
- 💸 Expensive cartridges
- 🤷‍♂️ Unreliable device

**Reported bugs**

- App notifications not working properly
- Inability to upload pool photos
- Inconsistent app performance after updates

**Requested features**

- Ability to set custom testing schedule
- Measure salt levels
- Provide more advice on adjusting water chemistry
- Add hourly temperature readings


### MRCOOL Connect

[App page](https://appshunter.io/ios/app/mrcool-connect/id6744633487)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WaterGuru free?

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

### Is MRCOOL Connect free?

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

### Do WaterGuru or MRCOOL Connect have ads?

MRCOOL Connect shows ads; WaterGuru does not.

### Which is updated more often, WaterGuru or MRCOOL Connect?

WaterGuru ships an update every 4 weeks, and MRCOOL Connect every 4 days. Most recently, WaterGuru was updated on October 20, 2026 and MRCOOL Connect on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*