Based on the users' reviews of the "Hand Master" app, here are three cons and pros in English, limited to 15 words each: **Cons:** 1. Some users found the app's tutorials too long and boring, leading to frustration. 2. Others experienced errors and crashes, disrupting their workout routine. 3. A few users felt the app's community features were underwhelming and not very engaging. **Pros:** 1. Users praised the app's comprehensive hand exercises and workout plans, tailored to their needs. 2. Many appreciated the app's clear instructions and visual demonstrations, making it easy to follow. 3. Users enjoyed the app's motivational reminders and progress tracking, helping them stay committed.