The Best Smart Water Monitors

Whole-home water flow monitors that catch leaks and track usage, ranked.

We pulled the smart water monitors on Amazon and scored them on rating, review volume, and features: leak detection, automatic shutoff, and plumbing-free installation.

Updated Oct 11, 2026 · Amazon prices checked Oct 11, 2026

Our picks

Best Overall

Flume

Flume F2X Smart Water Monitor

4.3 (81)

Flume straps onto your water meter in minutes and alerts you to leaks indoors and out.

4.5 (362)

Frizzlife's ultrasonic monitor detects flows down to 0.01 GPM and closes the valve itself, rated 4.5 stars.

GreenVation Water Flow Monitor and Valve (3/4 in)

4.8 (14)

An ultrasonic flow monitor and motorized valve for $119.99.

Moen Flo Smart Water Monitor and Shutoff (900-006, 1 in)

3.9 (2,320)

Moen Flo learns your home's water patterns and shuts off the main line on its own.

$608.00

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Side-by-side

Works with

Swipe the table sideways to see every column.

#	Monitor	Price	Rating	Reviews	Works with	Type	Install	Shutoff	Score
1	Moen Flo Smart Water Monitor and Shutoff (900-006, 1 in)	$608.00	3.9	2,320		Inline monitor and valve	Professional install recommended	Yes	84
2	Frizzlife LP365	$329.99	4.5	362	Smart Life app	Inline ultrasonic monitor and valve	Plumbed into main line	Yes	83
3	Flume F2X Smart Water Monitor	$269.00	4.3	81	Flume app	Meter strap-on monitor	DIY, no tools, fits 95%+ of meters	No	74
4	GreenVation Water Flow Monitor and Valve (3/4 in)	$119.99	4.8	14	Smart Life app	Inline ultrasonic monitor and valve	Plumbed in	Yes, by flow alarm	66
5	Haozee WiFi Smart Water Valve and Auto Shut-Off	$159.99	3.8	45	Tuya app	Inline ultrasonic monitor and valve	Plumbed in, 5 V power	Yes	62
6	Bluebot Mini Smart Water Meter Bundle	$258.76	3.8	21	Bluebot app	Clamp-on ultrasonic meter	DIY clamp, no cutting	No	58

Works with: hover or tap an icon for the system name. A system is shown when it supports the product directly or through the hub the listing requires. Every monitor here connects over Wi-Fi to its maker's app. YoLink's FlowSmart uses LoRa through a hub, so it isn't included here.

The full ranking

Scored out of 100: 45% customer rating, 30% review volume, 25% features. How we rank

Best Premium

Moen

Moen 900-006 Flo Smart Water Monitor and Automatic Shutoff Sensor, Wi-Fi Connected Water Leak Detector for 1-Inch Diameter Pipe

3.9 2,320 reviews

Score 84/100

$608.00

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500+ bought in past month

The best-known whole-home shutoff, sized for 1-inch pipes.

Type: Inline monitor and valve
Install: Professional install recommended
Auto shutoff: Yes
Extras: Learns your water patterns

Pros

2,320 reviews
App, phone, and email alerts
Sold by Amazon

Cons

$608
3.9 stars
Professional install recommended

Best with Shutoff

Frizzlife

Frizzlife LP365 Smart Water Monitor and Automatic Shutoff Valve - 0.01GPM Ultrasonic Micro Leak Detection, APP Wi-Fi Remote Control, Real-Time Flow/Temp Alarm, 24/7 Water Usage Reports, 3/4" and 1"

4.5 362 reviews

Score 83/100

$329.99

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100+ bought in past month

Catches the tiniest leaks and closes the main line automatically.

Type: Inline ultrasonic monitor and valve
Install: Plumbed into main line
Auto shutoff: Yes
Extras: 0.01 GPM micro-leak detection, NSF/ANSI 61 & 372

Pros

0.01 GPM sensitivity
SMS, phone call, and app alerts
4.5 stars

Cons

Needs a plumber
Smart Life app
$329.99

Best Overall

Flume

Flume F2X Smart Home Water Monitor and Leak Detector (Newest Model) – Real-Time Water Usage Tracking, Indoor/Outdoor Leak Alerts, Irrigation & Sprinkler Monitoring, Easy No-Plumbing Installation

4.3 81 reviews

Score 74/100

$269.00

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300+ bought in past month

Know exactly where your water goes, without a plumber.

Type: Meter strap-on monitor
Install: DIY, no tools, fits 95%+ of meters
Auto shutoff: No
Extras: AA battery packs, irrigation leak alerts

Pros

No plumbing at all
Indoor and outdoor leak alerts
Standard AA batteries

Cons

Can't shut off water
$269
Only 81 reviews

Best Budget

GreenVation

Water Flow Meter, 0.1gal/min Water Flow Monitor Alarm, Water Valve 3/4"

4.8 14 reviews

Score 66/100

$119.99

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The cheapest monitor here that can also close the water.

Type: Inline ultrasonic monitor and valve
Install: Plumbed in
Auto shutoff: Yes, by flow alarm
Extras: Manual button, backup battery

Pros

$119.99
Manual shutoff button
4.8 stars

Cons

Only 14 reviews
0.1 gal accuracy
App control off during outages

Haozee

Haozee WiFi Smart Water Valve and Auto Shut-Off

3.8 45 reviews

Score 62/100

$159.99

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A budget monitor and valve that pairs with cheap Tuya leak sensors.

Type: Inline ultrasonic monitor and valve
Install: Plumbed in, 5 V power
Auto shutoff: Yes
Extras: Backup battery, works with Tuya leak sensors

Pros

No gateway needed
Backup battery
$159.99

Cons

3.8 stars
Needs a power outlet
Only 45 reviews

Bluebot

Bluebot Mini Smart Water Meter Bundle – WiFi Leak Detector & Water Usage Monitor, Clamp-On Ultrasonic Flow Meter, App-Enabled, Fits ¾" & 1" Pipes, Indoor/Outdoor Use Bundle 1

3.8 21 reviews

Score 58/100

$258.76

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Clamps onto the pipe itself, for homes where the meter is hard to reach.

Type: Clamp-on ultrasonic meter
Install: DIY clamp, no cutting
Auto shutoff: No
Extras: Fits 3/4 and 1 in copper, PVC, PEX

Pros

No pipe cutting
Works on many pipe types
Text alerts

Cons

3.8 stars
Only 21 reviews
$258.76

Buyer's guide

Flow monitor or shutoff valve?

A flow monitor watches your water use and spots leaks, dripping toilets, and running hoses. A shutoff valve can also close the main line. Some devices do both; others only alert you.

Does it need a plumber?

Strap-on meter readers clip around your water meter with no plumbing. Inline monitors and valves are cut into the main line and usually need a plumber.

Will it catch small leaks?

Most run a nightly check for tiny steady flows, which catches running toilets and drips that a leak puck under the sink won't.

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Water monitors on other protocols

Compare all smart water monitors on one page →