Lofi Cafe is a lofi radio with really lovely lofi music and aesthetic graphics. 

You can change the mood of your study area by pressing g which lets you change the gif that is playing in the background. 

Lifeat.io offers a bunch of different workspaces through nature videos live cams of cities, videos of cafes etc.

You can also control the ambience of each scene by turning the volume up and down. You can also set a pomodoro timer. 

Noisli has a lot of different ambient noises to choose from including rain, wind, ocean, waves, a fireplace, birds, white noise etc.

You can combine them as you want and adjust their volumes levels the create the perfect ambient mix. 

You can download Flow from the mac app store. this is a very minimal study timer that you can keep in the corner of your screen while you work. You can set the duration of your work/study sessions as well as your breaks.

It can also block you from opening certain apps