SmartTub® vs Sutro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SmartTub®
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.
- 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
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The SmartTub® app is your personal hot tub assistant, making you a hot tub expert. Acting as a quick reference guide, your app tailors tips, how-to videos and information based on how you use your hot tub. Whether you're across town or in the comfort of your own home, you can relax knowing you will always be informed with the SmartTub™ System. o Enjoy easy setup -- just pair your app o Discover enhanced product knowledge and support o Master hot tub care with personalized tips and how-to videos o View energy usage estimates** o Adjust key settings, such as energy efficiency and temperature while away o Receive power outage notifications to reduce complications o Alerts you and your dealer when your hot tub needs attention o Stay connected with your dealer and 'Click for Service' Requirements * SmartTub™ hardware installed on hot tub, compatible with 2018+ Hot Tubs * SmartTub™ system uses cellular-based communication and requires cell service from our provider partner in your area. * Requires subscription beginning in second year of ownership, first year included in the price of purchase. **Estimates are based on sensor readings and are not meant to match your utility measurements, see your local utility company for specifics to your local system.
Sutro
Effortlessly manage your pool or spa water quality. This app works with a smart monitor to automatically track pH, free chlorine, alkalinity, and temperature, providing insights that make sense for optimal water conditions.
- Automatic water quality monitoring
- pH tracking
- Free chlorine measurement
- Alkalinity tracking
- Temperature monitoring
- Seamless app integration
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Sutro is the simple, safe, and seamless way to manage your Pool (or Spa) water with measurements that make sense and monitoring that is automatic. The Sutro app works with the Sutro Smart Monitor to measure your pool or spa’s pH, free chlorine (ppm), alkalinity, and temperature without you having to do anything.
Screenshots
Verdict
The clearest difference is review sentiment: Sutro at 73% against SmartTub®'s 24%. Sutro also leads on monetization model (free vs free with in-app purchases) and rating (3.9 vs 3.6). SmartTub®'s advantage is update cadence (fortnightly vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Sutro holds the better App Store score, 3.9 against 3.6. Both are backed by a comparable volume of ratings — 320 and 175 respectively. Written reviews point the same way: 24% of SmartTub®'s written reviews are positive against 73% of Sutro's.
SmartTub® ships an update fortnightly, Sutro every 2 months. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.
| Parameter | SmartTub® | Sutro |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (320 ratings) | 3.9 (175 ratings) — better |
| Positive reviews | 23.6% of reviews | 72.9% of reviews — better |
| Number of ratings | 320 — better | 175 |
| Update frequency | Fortnightly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.1 | 12.4 — better |
| Further details — not scored | ||
| Size | 97 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Jacuzzi Brands Corp. | Sutro Connect Inc |
Customer experience
SmartTub®
Sutro
User reviews
SmartTub®
From 320 App Store ratingsWhat we love
- 🚀 Convenient remote control
- 🔒 Alerts for power outages
- 👍 Easy to use
- 👍 Useful monitoring features
Room to improve
- 🐛 Frequent connectivity issues
- 🐛 Temperature settings not reliable
- 🐛 Buggy and unstable
- 💰 Expensive annual subscription
- 🤔 Lack of WiFi option
Sutro
From 175 App Store ratingsWhat we love
- 🚀 Easy to use
- 👍 Accurate water testing
- 💡 Helpful notifications and recommendations
- 🔒 Reliable customer support
- 🚀 Convenient pool monitoring
Room to improve
- 🐛 Connectivity issues
- 🐛 Inaccurate readings
- 🐛 Buggy app performance
- 🔋 Expensive subscription
- 🐛 Setup difficulties
Bugs and requests
SmartTub®
Reported bugs
4 issues- App frequently logs out users
- Inability to register warranty
- Inconsistent temperature readings
- Unreliable connection to spa
Requested features
5 requests- 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
Reported bugs
4 issues- App crashes and freezes
- Disconnection issues with hub
- Calibration failures
- Inaccurate water chemistry readings
Requested features
4 requests- Measure total hardness and CYA
- Customizable notification settings
- Ability to cancel subscription easily
- Improved app stability and user experience
In-app purchases
SmartTub®
No in-app purchases
Sutro
No in-app purchases
