Comparison

Flume Water vs Sub

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Real-time water usage data
  • Leak detection and alerts
  • Water consumption budgeting
  • Household water use analysis
  • Easy self-installation
Features
Read 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

About

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.

Highlights
  • 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
Features
Read 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

Flume Water4 screens
Sub4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Flume Water ships an update every 6 weeks, Sub every 5 weeks. Both last shipped on November 11, 2026.

Scorecard4 real differences · 6 level
Flume Water versus Sub: the parameters behind the verdict, then further details
ParameterFlume WaterSub
PriceFreeFree
Rating4.7 (1.7K ratings) — better4.4 (790 ratings)
Positive reviews58.6% of reviews — better14.8% of reviews
Number of ratings1.7K — better790
Update frequencyEvery 6 weeksEvery 5 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.5
Further details — not scored
Size56 MB69 MB
Age rating4+4+
DeveloperFlume, Inc.Sub-Zero and Wolf

Customer experience

Flume Water

All ratings1,608 ratings
Positive92.0%
Neutral2.8%
Negative5.2%
Written reviews128 reviews
Positive58.6%
Neutral11.7%
Negative29.7%

Sub

All ratings778 ratings
Positive85.1%
Neutral3.0%
Negative12.0%
Written reviews182 reviews
Positive14.8%
Neutral8.2%
Negative76.9%

User reviews

Flume Water

From 1.7K App Store ratings

What 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 ratings

What 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

2 purchases

Flume Water

Subscriptions1
  • Flume Insight1 Month trial$49.991 Year
One-time1
  • Flume Insight$49.99
None

Sub

No in-app purchases

Questions

Is Flume Water free?
Flume Water is free to download, with in-app purchases available.
Is Sub free?
Sub is free to download, with no in-app purchases.
Which has better reviews, Flume Water or Sub?
Flume Water is rated higher. Flume Water averages 4.7 out of 5 from 1.7K ratings, while Sub averages 4.4 from 790 ratings.
Do Flume Water or Sub have ads?
Neither Flume Water nor Sub shows ads.
Which is updated more often, Flume Water or Sub?
Flume Water ships an update every 6 weeks, and Sub every 5 weeks. Most recently, Flume Water was updated on November 11, 2026 and Sub on November 11, 2026.

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