A modern phone microphone would have embarrassed studio gear from a few decades ago. When a phone recording sounds bad, the phone is almost never the reason — the recording situation is. Which is excellent news: situations are free to fix.
Voice level falls off fast with distance; room reflections and background noise don't. Record from across the desk and the mic hears your voice and the room at similar strength — that's the "recorded in a bathroom" sound, and no tool truly removes reverb. Record from two fists away and your voice dominates everything.
The two-fist rule: stack your fists between mouth and phone. Closer than one fist you get plosive pops on every P; past three, the room starts winning. Point the bottom of the phone (where the primary mic lives) roughly at your chin, not your forehead.
Hard parallel surfaces bounce sound back into the mic a few milliseconds late — that's echo-y "roominess". Soft, irregular stuff absorbs it. The ranking, best to worst: a car (upholstered, tiny), a closet full of clothes, a bedroom with curtains and a duvet, a living room, a kitchen, a bathroom. The duvet trick is real: important take, drape a blanket over your head and the phone like a tiny tent. Looks absurd, sounds professional.
1 – Airplane mode. A notification mid-take is a retake; the buzz of the radio near the mic can be noise even without one.
2 – Use a lossless or high-bitrate setting if your recorder app offers one. Heavy compression turns quiet detail into mush that no cleaner recovers.
3 – Switch off what hums. Fan, AC, fridge if you're near the kitchen. Ten seconds of walking around beats an hour of processing.
4 – The habit: record one second of silence before you speak. If any steady noise survives all of the above, that second is a perfect sample for the noise remover — it's the difference between the tool guessing and the tool knowing. Full chain for a rough take: denoise → tighten → normalize. Under two minutes, all on the phone, nothing uploaded.