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These devices lend a helping hand in making the care of your houseplants simpler and more straightforward. You'll no longer have to ponder whether your plant needs watering today or if it can wait until later. The sensor keeps track of essential factors like soil and air humidity, light intensity, temperature, and even the nutrient content of the soil. With all these measurements, it's clear what your plant needs to be at its happiest. The data collected by the sensor is sent directly via Wi-Fi to the mobile app, compatible with both iOS and Android. The device operates on battery power, and you'll receive notifications when it's time to reach for the watering can or when your cactus needs to be moved into the shade. In case of any urgent issues, Smarty Plants will provide you with tips on how to revive your green companion. However, do keep in mind that these sensors won't protect your plants from curious cats. The price of this device is $44.