Do I need to sign a contract? October 02, 2019 18:54 Updated No. While there is an annual fee of $120 for ongoing monitoring and analytics, there are no contracts for you to sign with us. You can cancel at any time by contacting us at support@alertlabs.com and providing your sensor registration number. Related articles Will Flowie-O affect my water meter reading? What's the range for Flowie-O? Experts Only Calibration