Based on the user reviews of the app "Knock" (https://play.google.com/store/apps/details?id=com.pnixgames.knock&hl=en&gl=us), I've compiled a list of three pros and three cons with 15 words or less for each: Pros: * Fast and easy meForgot password recovery feature saves time. * Intuitive interface makes sharing files and contacts a breeze. * Secure cloud storage keeps data safe and easily accessible. Cons: * Advertisements are intrusive and annoyingly frequent. * Limited storage options available, resulting in data limitations. * Technical issues sometimes cause app crashes and data loss. Please note that user reviews are subject to change over time and may not be exhaustive. Additionally, this assessment is based on the reviews available at the time of my knowledge cutoff.