What this suits
Rain is one of the most consistent background sounds there is — no gaps, no sudden peaks, nothing you can hum along to. That flatness is exactly what makes it easy to study through. It sits behind reading, problem sets, essay drafts, and revision without competing for attention the way a song or podcast would, and it covers the small, unpredictable noises — a door closing, a housemate's phone, hallway chatter — that are what actually break concentration, more than the noise level itself.
How to pair it
This page loads plain rain at a moderate volume, which works on its own for most study sessions. If your room has a low, rumbling background noise a single rain layer does not fully cover — traffic, an HVAC vent, a dorm hallway — open the full mixer in Pomodo and add a touch of brown noise underneath. Keep one sound dominant; stacking two loud, similar textures tends to muddy the effect rather than deepen it. A little thunder in the far background can add texture for a slow reading session, but skip it if you are trying to hold a train of thought — the occasional rumble is enough to catch attention.
Suggested session length
25 minutes is a reasonable place to start — long enough to get into a reading or writing groove, short enough that stopping does not feel like a chore. For denser material, two or three rounds back to back with a short break between tends to hold up better than one long uninterrupted stretch.