Matching a plant to the room you actually have
Most plant failures start before the plant arrives home. A photograph or a care label tells you what a plant needs in general, but your room is the one that decides whether it gets it: how much daylight reaches that corner, which way the window faces, whether the air runs damp or dry. A plant chosen on looks alone succeeds or struggles on those details.
The tool on this site works from the room outwards. You describe the space you're filling and it returns plants that are likely to do well there, with the reasoning behind each suggestion.
What you tell it and what comes back
You describe the room in the terms you'd use to someone standing in it with you: how much daylight it gets through the day, which direction the main window faces, and whether it's a kind of room with its own quirks, a bathroom running damp from showers, an office that's dim all winter, a hallway with no window at all. From that, it returns a short list of plants suited to those conditions, with a note on why each one is there.
The point of asking for specifics is to get a specific answer back. A list of forty plants that tolerate low light is not much use to someone standing in one room trying to make one decision; a shorter list, narrowed to the conditions you actually described, is.
Why the room decides more than the plant's reputation
A plant sold as tolerant of low light was very likely grown and displayed under strong artificial lighting, which is not the same as the few hours of weak daylight a north-facing window gets through a British winter. The gap between a shop's growing conditions and a rented flat's actual daylight is where a lot of houseplants quietly decline over their first winter, long after the label has been forgotten.
That's the reason room conditions drive the result here. A plant that thrives in a bright south-facing room can sulk for months in a dim hallway, and a plant marketed as easy everywhere still has a room it actually prefers. Matching the two the right way round is most of the work.
What it can't tell you
The suggestions it gives are a starting point, not a guarantee the plant will thrive in your home. It works from what you tell it about the room, and it has no way to see a draughty window, a radiator directly underneath a shelf, or a flat that runs colder than most over winter, all of which can shift a plant from thriving to merely surviving. Treat a result as a shortlist worth checking further, and expect it to be wrong occasionally the way any tool working from a handful of inputs will be.
Once you have a plant in mind, its own care guide is where the specifics live: watering frequency, the soil depth to check before you water again, and what a problem actually looks like when it starts. The individual plant guides, including pothos, ZZ plant and peace lily care pages, go into that level of detail.
Where to take the result next
If you want the room-by-room reasoning behind the suggestions, the guide to plants for British rooms covers north-facing flats, bathrooms and offices in more depth, including how UK winter daylight changes what counts as a low-light room. Once you've settled on a plant, sizing the pot correctly is the next decision, and the guide to choosing planter size covers how to measure for it properly.