# SmartTub® vs Sutro

The clearest difference is update cadence: SmartTub® at fortnightly against Sutro's every 8 months. SmartTub® also leads on rating (3.6 vs 3.2) and review sentiment (24% vs 0%). Sutro's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (12.0 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.

SmartTub® holds the better App Store score, 3.6 against 3.2. That said, the two scores are not equally well evidenced: SmartTub® has 320 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 24% of SmartTub®'s written reviews are positive against 0% of Sutro's.

SmartTub® ships an update fortnightly, Sutro every 8 months. The most recent releases landed on October 29, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | SmartTub® | Sutro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (320 ratings)](https://appshunter.io/ios/app/smarttub/id1318260634/reviews)** | [3.2 (11 ratings)](https://appshunter.io/ios/app/sutro-pro/id1552389685/reviews) |
| Number of ratings | **320** | 11 |
| Positive reviews | **23.6% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 8 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 97 MB | 65 MB |
| Requires iOS | 15.1 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jacuzzi Brands Corp.](https://appshunter.io/developer/967204652) | [Sutro Connect Inc](https://appshunter.io/developer/1439627398) |

## What reviewers say

### SmartTub®

[App page](https://appshunter.io/ios/app/smarttub/id1318260634)

This app acts as a personal hot tub assistant, providing tailored tips, how-to videos, and information based on your usage. It allows remote control of settings, energy usage estimates, and notifications for maintenance or power outages, ensuring you're always informed about your hot tub's status.

**Highlights:** Personalized hot tub tips and how-to videos, Remote adjustment of temperature and energy efficiency, Energy usage estimates, Power outage notifications, Dealer alerts for maintenance, Remote connection to dealer service

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Convenient remote control
- 🔒 Alerts for power outages
- 👍 Easy to use
- 👍 Useful monitoring features

**What reviewers complain about**

- 🐛 Frequent connectivity issues
- 🐛 Temperature settings not reliable
- 🐛 Buggy and unstable
- 💰 Expensive annual subscription
- 🤔 Lack of WiFi option

**Reported bugs**

- App frequently logs out users
- Inability to register warranty
- Inconsistent temperature readings
- Unreliable connection to spa

**Requested features**

- Ability to remotely turn off spa
- Customizable heating and filtering schedules
- Chemical tracking and maintenance reminders
- Improved Apple Watch integration
- Better temperature and setting controls


### Sutro

[App page](https://appshunter.io/ios/app/sutro-pro/id1552389685)

This app connects multiple pool and spa monitoring devices to a single interface. It allows users to manage and view the status of all their connected Sutro devices from one convenient location.

**Highlights:** Connect multiple Sutro devices, Centralized device management, View device status, Route management for devices

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SmartTub® free?

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

### Is Sutro free?

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

### Which has better reviews, SmartTub® or Sutro?

SmartTub® is rated higher. SmartTub® averages 3.6 out of 5 from 320 ratings, while Sutro averages 3.2 from 11 ratings.

### Do SmartTub® or Sutro have ads?

Neither SmartTub® nor Sutro shows ads.

### Which is updated more often, SmartTub® or Sutro?

SmartTub® ships an update fortnightly, and Sutro every 8 months. Most recently, SmartTub® was updated on October 29, 2026 and Sutro 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.*