To best answer when you should log in to an app, I need more information. Please specify:

• Which app are you referring to? Different apps have different optimal login times based on their purpose.
• What are you trying to accomplish? Your goal influences when you should log in.

For example:

• Email App (e.g., Gmail, Outlook): Log in at the start of your workday and periodically throughout the day to check for important messages.
• Social Media App (e.g., Facebook, Twitter): Log in when you want to connect with friends, catch up on news, or share updates. Consider setting time limits to avoid excessive use.
• Banking App: Log in to check your balance, pay bills, or transfer funds as needed.
• Fitness App: Log in before and after workouts to track your progress.
• Gaming App: Log in whenever you have free time and want to play.

Once you provide the name of the app and your goal, I can give you a more specific and helpful answer.