# FROG Water Care vs MRCOOL Universal

The clearest difference is rating: FROG Water Care at 4.5 against MRCOOL Universal's 1.4. FROG Water Care also leads on ratings volume (4.9K vs 14). MRCOOL Universal's advantage is update cadence (every 2 days vs every 2 months) and iOS requirement (10.0 vs 15.6). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

FROG Water Care holds the better App Store score, 4.5 against 1.4. That said, the two scores are not equally well evidenced: FROG Water Care has 4.9K ratings behind it against 14, so its average is the more settled of the two. Written reviews point the same way: 24% of FROG Water Care's written reviews are positive against 17% of MRCOOL Universal's.

FROG Water Care ships an update every 2 months, MRCOOL Universal every 2 days. The most recent releases landed on October 29, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | FROG Water Care | MRCOOL Universal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (4.9K ratings)](https://appshunter.io/ios/app/frog-water-care/id1417747779/reviews)** | [1.4 (14 ratings)](https://appshunter.io/ios/app/mrcool-universal/id1506149089/reviews) |
| Number of ratings | **4.9K** | 14 |
| Positive reviews | **24.2% of reviews** | 16.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Free | Free |
| Size | 51 MB | 10 MB |
| Requires iOS | 15.6 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [King Technology](https://appshunter.io/developer/1417747778) | [HaiLin Energy Technology Inc.](https://appshunter.io/developer/860466636) |

## What reviewers say

### FROG Water Care

[App page](https://appshunter.io/ios/app/frog-water-care/id1417747779)

This app guides pool, hot tub, and swim spa owners using specific sanitizing systems. It offers personalized recommendations, step-by-step instructions based on test strip results, and troubleshooting advice to maintain optimal water conditions.

**Highlights:** Supports FROG and FROG @ease test strips, Step-by-step water care recommendations, View testing history, Dealer locator, Dosage guidance, Water problem troubleshooting, Access to customer service

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 🚀 Convenient water testing
- 👍 Helpful for new hot tub owners
- 🚀 Simplifies water maintenance

**What reviewers complain about**

- 🐛 Water testing feature doesn't work
- 🐛 Frequent crashes and bugs
- 🔒 Requires too much personal information
- 🐛 Inaccurate water treatment recommendations

**Reported bugs**

- Login/registration issues
- Reminders not working properly
- Incompatible with certain test strips
- Crashes when trying to diagnose issues

**Requested features**

- Add notes/log feature
- Improve water testing accuracy
- Allow offline use
- Simplify registration process


### MRCOOL Universal

[App page](https://appshunter.io/ios/app/mrcool-universal/id1506149089)

Control your smart thermostat remotely to adjust the temperature from anywhere. Optimize your home's climate with this easy-to-use controller. Some features require an internet connection.

**Highlights:** Remote temperature adjustment, Control from anywhere, Easy-to-use interface, Requires internet for some features

**In-app purchases:** none


## Frequently asked questions

### Is FROG Water Care free?

FROG Water Care is free to download, with no in-app purchases.

### Is MRCOOL Universal free?

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

### Which has better reviews, FROG Water Care or MRCOOL Universal?

FROG Water Care is rated higher. FROG Water Care averages 4.5 out of 5 from 4.9K ratings, while MRCOOL Universal averages 1.4 from 14 ratings.

### Do FROG Water Care or MRCOOL Universal have ads?

Neither FROG Water Care nor MRCOOL Universal shows ads.

### Which is updated more often, FROG Water Care or MRCOOL Universal?

FROG Water Care ships an update every 2 months, and MRCOOL Universal every 2 days. Most recently, FROG Water Care was updated on October 29, 2026 and MRCOOL Universal on October 21, 2026.

---

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