Flume Water vs Sub
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
Read full descriptionHide full description
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
Sub
This app enhances your kitchen experience by guiding you through recipes from websites and a curated collection. It allows remote control and monitoring of Sub-Zero refrigeration, Cove dishwashing, and Wolf appliances, ensuring optimal performance and convenience.
- Guided cooking from online recipes
- Chef-tested recipes optimized for Wolf appliances
- Remote dishwasher control and monitoring
- Refrigerator settings and alerts
- Filter recipes by cooking mode
- Bookmark and share recipes
Read full descriptionHide full description
Elevate your kitchen experience with the Sub-Zero Group Owner’s App. Connect your Wi-Fi-enabled appliances and enjoy greater control, personalized cooking, and now, integrated wine inventory management. • Build and manage your wine collection • Scan bottles to quickly add wines to your inventory • Track where each bottle is stored across locations • Organize your collection with filters, groups, and tags • View inventory history as wines are enjoyed over time • Enjoy a guided cooking experience with recipes tailored to your appliances • Set timers and view oven status directly from recipe steps • Monitor and control your appliances from anywhere • Receive notifications for appliance status, maintenance, and more The app also gives you powerful control over your Sub-Zero refrigeration and Cove dishwashing appliances. Start your dishwasher remotely, monitor cycles, and manage supplies Wine Inventory transforms a traditionally manual task into a simple, intuitive experience. Manage your collection, understand where your wines are stored, and stay connected to your kitchen in one place. Download now and get more from every Sub-Zero, Wolf, and Cove appliance.
Screenshots
Verdict
The clearest difference is review sentiment: Flume Water at 59% against Sub's 15%. Flume Water also leads on rating (4.7 vs 4.4). Sub's advantage is in-app purchases (none vs 2). On price, ratings volume, update cadence and ads 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. Sub asks for nothing beyond the download.
Flume Water holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 1.7K and 790 respectively. Written reviews point the same way: 59% of Flume Water's written reviews are positive against 15% of Sub's.
Flume Water ships an update every 6 weeks, Sub every 5 weeks. Both last shipped on November 11, 2026.
| Parameter | Flume Water | Sub |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.7K ratings) — better | 4.4 (790 ratings) |
| Positive reviews | 58.6% of reviews — better | 14.8% of reviews |
| Number of ratings | 1.7K — better | 790 |
| Update frequency | Every 6 weeks | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 56 MB | 69 MB |
| Age rating | 4+ | 4+ |
| Developer | Flume, Inc. | Sub-Zero and Wolf |
Customer experience
Flume Water
Sub
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
Sub
From 790 App Store ratingsWhat we love
- 🚀 Responsive and intuitive app
- 👍 Helpful notifications and alerts
- 🔒 Secure connection to appliances
Room to improve
- 🐛 Frequent connection issues and disconnects
- 🔍 Lack of actual temperature monitoring
- 🤔 Confusing setup and pairing process
- 🔍 Missing key features like remote start
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
Sub
Reported bugs
4 issues- App crashes after recent updates
- Unable to log in or register account
- Appliances disappear from the app
- Firmware update failures brick appliances
Requested features
3 requests- Add support for Celsius temperature units
- Provide real-time temperature and energy consumption data
- Integrate with smart home platforms like Apple HomeKit
In-app purchases
Flume Water
- Flume Insight1 Month trial$49.991 Year
- Flume Insight$49.99
Sub
No in-app purchases









