01 · Measure under your lowest furniture
In an apartment the whole point is cleaning under the sofa and bed. Grab a tape measure and check your lowest clearance — most slim robots are 2.85 to 3.5 inches tall. If it won't fit, it just bumps the couch instead of cleaning under it.
02 · Self-empty dock, or empty it yourself?
A self-empty dock means you only deal with dust every few weeks — great if you travel or hate the chore. The trade-off is a bin-sized base that needs a permanent spot on your floor, which is real estate a studio may not have. Going dock-free keeps the footprint tiny.
03 · Random bounce vs. smart mapping
Budget robots bounce around at random, which works fine in a small, open one-bedroom. If your place is bigger or cluttered with cords and furniture legs, a mapping model cleans in tidy rows and lets you block off no-go zones so it won't eat a charging cable.
04 · Think quiet, and think move-out
Renters share walls, so look for models around 55 to 65 dB you can run without bothering neighbors. None of these drill into anything or require a subscription, and the dock-free picks pack back into the box in minutes when your lease is up.