My favorite app is notion, I discovered this last year, and I thought it was a fantastic way to organize my thoughts. It's great for creating databases for school, work, design content, and more. You can also create templates for recipes, book lists, to-do lists. Many people would say it's like a second brain. You can download many different notion templates from many other YouTubers.
Emphasis is a timer that uses the Pomodoro method; for those who don't know what that is, it sets a 25 min work timer, a 15 min timer, and a 5 min timer. The point of this timer is to break this down in chunks of time to focus when it's work time. Also, it's a great way to track how long you have you've been working. It is easy for designers to get "in the zone" and work for 10 hours with no breaks; this is a way to give yourself time to eat. Remember to eat, please.
This app is a tracking app to track your habits and set goals for yourself to accomplish each day. I think it's a great way to track the patterns that you have for the day.
Emmo is a great app for journaling; as a designer, I appreciate the app's interface. It's a great way to track your thoughts and feelings and associate them with emotion. Journaling is great because letting your thoughts out gives you more room in your mind to focus.
I don't know what you like about calendar apps, but my favorite is apple calendar. There is an app that I also used called Owl that I will later discuss, but I pair this with my calendar app to have my apple calendar to be saved on light mode all day. Google calendar is similar; whatever you like depends on you; I recommend color-coding your calendars to your classes throughout the day.
This is my ultimate favorite app for scheduling meetings or podcasts with guests. I also love this website because you can sync it with your google or apple calendar.
Owl is a great app that I like to use for designers who love working in a light mode in the day and dark mode at night. This app lets you schedule which apps to be in night mode or light mode. I use this to keep apps like notion and my apple calendar in light mode all day because I like working with them. It's a great way to focus when working in different mode settings based on your preferences.
Everyone has different preferences for being productive, and I think it has to do with trial and error. One thing to keep in mind when working is figuring out what works best for you. What may work for you may not work for someone else. Apps and websites don't make you a productive person; being self-disciplined enough to stick to your schedule makes you effective.