Flume Water vs Sutro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flume Water
Monitor and manage your home's water usage with real-time data and leak detection. This app helps you understand your consumption, set budgets, and receive alerts to prevent costly water damage.
- Real-time water usage data
- Leak detection and alerts
- Water consumption budgeting
- Household water use analysis
- Easy self-installation
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The Flume app connects with a Flume Water Sensor installed on your home’s water meter. Flume enables customers to manage, monitor, and conserve water in their home. Catch Water Leaks and Protect Your Home Surprises are fun, but not when it comes to leaks. Flume alerts you of abnormal (or accidental) water usage to give you peace of mind whether you’re at home or away. Down-to-the-Minute Water Use Data Flume helps you paint a picture of your household’s water use. Dig into the data—down to the one-hundredth of a gallon—and find new ways to reduce your water use. Overflowing with Savings A device that pays for itself. Flume automatically suggests a budget so you can cap your consumption and creates leak notifications to catch costly drips. Simple Self-Installation. No Plumbing Necessary. Set up and install Flume in minutes. Just strap it to your water meter. No pipe cutting. No wiring. No appointments. No plumbers. To purchase a Flume Water Sensor, visit https://flumewater.com
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 rating: Flume Water at 4.7 against Sutro's 3.9. Flume Water also leads on ratings volume (1.7K vs 175). Sutro's advantage is in-app purchases (none vs 2) and review sentiment (73% vs 59%). On price, update cadence, ads and device support 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. Flume Water sells 2 in-app purchases, starting at $49.99 per year. Sutro asks for nothing beyond the download.
Flume Water holds the better App Store score, 4.7 against 3.9. That said, the two scores are not equally well evidenced: Flume Water has 1.7K ratings behind it against 175, so its average is the more settled of the two. Written reviews complicate that: 59% of Flume Water's written reviews are positive against 73% of Sutro's, so the app with the better star average is not the one people write more warmly about.
Flume Water ships an update every 6 weeks, Sutro every 2 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.
| Parameter | Flume Water | Sutro |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.7K ratings) — better | 3.9 (175 ratings) |
| Positive reviews | 58.6% of reviews | 72.9% of reviews — better |
| Number of ratings | 1.7K — better | 175 |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 12.4 — better |
| Further details — not scored | ||
| Size | 56 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Flume, Inc. | Sutro Connect Inc |
Customer experience
Flume Water
Sutro
User reviews
Flume Water
From 1.7K App Store ratingsWhat we love
- 🚀 Easy installation and setup
- 🔒 Accurate water usage monitoring
- 👍 Helpful for detecting leaks
- 👍 Detailed water usage data and insights
- 👍 Responsive customer support
Room to improve
- 🐛 Connectivity issues and unreliable notifications
- 🔋 Short battery life and expensive replacement
- 👎 Clunky and unintuitive app interface
- 🔒 Privacy concerns with data collection
- 👎 Recurring issues after firmware updates
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
Flume Water
Reported bugs
4 issues- App freezes and crashes
- Inaccurate water usage reporting
- Calibration issues after battery replacement
- Delayed or missed leak notifications
Requested features
5 requests- Landscape mode support for tablets
- Integration with smart home platforms
- Customizable notification settings
- Ability to manually train the system
- Enhanced data export and analysis tools
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
Flume Water
- Flume Insight1 Month trial$49.991 Year
- Flume Insight$49.99
Sutro
No in-app purchases
