I will update the topic with more information.
Thank you.
I think this will be great.
Research more about the subject and expand your OP.
I did that with
https://bitcointalk.org/index.php?topic=3317586.0I read a lot about it and wrote. Then many users explained a lot of things to me that I wasn't aware and I updated it. Later on I read more about it and made new additions. You can do it here.
so far bitcoinfees.earn.com is inaccurate and leads to higher fees. coinb.in is better but i haven't checked it in long term to see how it performs under different circumstances.
I experienced this as well.
I usually search about 3-4 websites before making a transaction. usually I use a lower value than suggested.
I noticed that Electrum suggests a fee as well when you are about to make a transaction (and they were lower than those websites).. Few months ago I made transactions with 1 sat/byte that wwere confirmed in less than 1hour, and most of those websites were suggesting more han 10sat/byte.