I tried to send once a higher number of transactions (+30) in a few minutes to different addreses, and the starting recommended fees were about $0.15 for the first one. I sent the first and having that number in my head, I kept sending to other addresses without ever looking again at the fees.. only to find out at the 11th transaction that the fees just kept getting higher and higher, so the last one did cost $0.94 in terms of fees. Looking at all the transactions in a row the fees were like $0.15 for the first, $0.19 for the second, $0.24 for the third and so on until I reached that sum. Then I sent the next ones by choosing my own wanted transaction fee, which was $0.20 for each. They got confirmed in a few dozens of minutes..
Whenever you send a transaction, double check the fees. $4 for your small transaction is too much.. just put $0.2 like I always do, and you should be doing fine.
Thanks, i didn't want to tamper with the transaction fees since it appears I'm doing that at my own risk. I couldn't afford the money being lost in the blockchain or not confirmed as i didn't have extra at that time. I still want to know how one manages to gather 'dust' in the process of transaction. I've been using the wallet for about 2 years now and i still intend to have these bits of bitcoin transactions here and there from time to time. I want to avoid the 'dust' that leads to issues as this
The app recommended me to send a 0.00091BTC fee or my transaction "would never get confirmed". My first try was a 'pain': I tried to send the same transaction (worth roughly $25) with 0.0001BTC in fees and it went out well (got confirmed in around one day or so). Since then, I'm sending most transactions with 0.0001BTC in fees when I am not in a hurry, 0.0002BTC when I need to get it confirmed in a few hours and 0.0003BTC when I want to get it confirmed ASAP. Most 0.0001BTC fees transactions get confirmed in max a day.