Often, you won’t even need a tripod. A couple of bean bags could do. Also, I’d recommend to shoot about twice as many frames as you think for the time period because it’s a lot easier (and with better results) for software to speed up a video by dropping frames than it is to stretch one where there are not enough.
This sample is actually my very first test of a smartphone timelapse shoot – way back in 2020 (two years before I joined iNat).
