**A battery-powered leak-sensor kit with an internet-connected hub is the simplest inexpensive solution.** Put a sensor under each suspect fixture; the hub sends an alert to your phone when one gets wet.

Two options worth comparing:

| Option | Approximate US starter cost | Remote alerts |
|---|---:|---|
| **GoveeLife water-leak kit** | $44 for a gateway and three sensors | App notifications and email. Make sure you buy the gateway bundle. |
| **YoLink leak-sensor kit** | $59 for a SpeakerHub and two sensors | Push, email, and SMS; check current SMS allowances before relying on texts. |

Those prices are manufacturer listings and may vary by region or promotion. Sources: [Govee kit](https://us.govee.com/products/smart-water-leak-detector), [YoLink starter kits](https://shop.yosmart.com/collections/water-hub-starter-kits), [YoLink notifications](https://shop.yosmart.com/pages/system-builder-water-leak-protection).

For your sinks and refrigerator, I’d start with the Govee gateway bundle for cost. To make whichever system you choose dependable over time:

- **Place sensors where water will collect first**, below supply connections and valves. A sensing cable can cover more area behind a refrigerator.
- **Test the complete alert path:** wet the contacts as instructed, with your phone on cellular data, and confirm the notification arrives.
- Enable low-battery alerts where available, and repeat the wet test every few months.
- Keep audible alarms enabled, and configure phone notifications so you’ll hear them.

**Remote notification depends on a working connection.** A small UPS for the hub, router, and modem can help during power cuts, but an internet outage still prevents cloud alerts. YoLink explicitly documents this limitation. [YoLink FAQ](https://support.yosmart.com/hc/en-001/articles/17989439879705-Get-to-Know-YoLink-Q-As)

Given your previous whole-house flood, I would also consider **automatic water shutoff** as a later upgrade. An alert only helps if someone can respond quickly; a valve can stop the leak while you’re away. Certain YoLink sensor/controller combinations can be paired to shut the valve locally without internet, provided they’re configured correctly. [YoLink leak protection](https://shop.yosmart.com/pages/water-leak-protection)