SerpBear

An open source app for tracking where a domain ranks in search. Add unlimited domains and unlimited keywords, and it follows their positions in Google and sends daily, weekly or monthly email notifications when positions change. A built-in SERP API lets marketing and reporting tools pull the data. It also helps with keyword research by generating keyword ideas from a tracked domain's content through a Google Ads test account, and a Search Console integration shows visit counts and impressions for each keyword. A mobile version can be added as a progressive web app. Written in TypeScript and MIT licensed, with documentation on its own domain. The author also points to a separate open source backup management app. Notifications can be sent at whatever interval suits you, so a keyword drop does not go unnoticed.