Thank you for the quick response and update! The vibration option is incredibly helpful. But the sound became too small. I think there is a bug. I don’t know how to increase the volume. Since I started using this app, my study time has actually increased significantly. Thank you so much for developing it!I do have one more suggestion: would it be possible to add a feature that locks the phone during class? Ideally, it would restrict screen time during specific hours while letting users whitelist certain apps they might need. I know this might go a bit beyond the app’s original purpose, but it could really help evolve it into a full-fledged study focus app!