I just checked the API and it's more accurate than i expected (compared with their website which tends to give overly high fee recommendation)
It's not as good as recommendation from other website or reading the chart manually though.
1 sat/byte purely depends on how many pending transaction and how many user who're not in hurry
I was under the impression that that site was crappy but maybe it's improved. I use bitcoinfees.net these days. I can't be bothered to figure out the jochen-hoenicke site. It might be a piece of piss with a few minutes of study but my mind is ossifying and I need spoon feeding both literally and figuratively these days.
Maybe it's all moot when things are quiet. The test of these sites and their estimates are when demand is high.
I'd like to know who supplies the estimates for the wallets with fee control.