How about smelly candles? They work pretty well just lighting them for a few minutes a day.
Anyway, as another poster noted, rarely is anything burning healthy to be around, even if it smells nice.
College kids in dorms, working adults with roommates, residents of cities with bad outdoor air quality, etc.
You can handle most bad smells by having good habits (taking out the trash, not leaving food sitting around, washing clothes, etc). If it's your house in general, you should probably fix it instead of masking it, because it's probably mold.
Just saying there's room for a little sympathy here.
I bought a Temtop monitor to verify if the "smart mode" (where it only runs if the air quality is low): https://www.amazon.com/gp/product/B07DHXQXGK/
I live in Los Angeles where the air quality isn't that great and in a rented apartment where I have limited choices. The air purifier made a dramatic difference in the first hour I had it and now it keeps the PM2.5 reading down to around 2-4 with minimal cycling.
Minimum wage is $7.25 in many states. Over 27 hours of gross income to buy that purifier.
The median income in the U.S. was $31,133 in 2019, putting that air purifier at over 13 hours of gross income.
I've been at my job 15 years, in the rare event that overtime is available a $200 air purifier would cost me approximately the net income of 10 hours of overtime.