Based on the user reviews on the Google Play Store, here are three cons and pros for the Endless Calendar app: **Cons:** 1. "Difficulty in customization options, limited design choices and no grid view." (Source: 3 out of 5 stars) 2. "App frequently crashes, need to restart multiple times to function properly." (Source: 2 out of 5 stars) 3. "No notification support, calendar events are not synced across all devices." (Source: 2 out of 5 stars) **Pros:** 1. "Clean and simple design makes it easy to use and navigate." (Source: 4 out of 5 stars) 2. "Customizable calendar layout and themes help personalize the experience." (Source: 4 out of 5 stars) 3. "Calendar events can be color-coded for better organization and prioritization." (Source: 5 out of 5 stars) Please note that the exact reviews and ratings may have changed since my knowledge cutoff.