The problem with bitcoin transactions is the slow transfer of bitcoins from one to another. The delay was caused by slow confirmations. The solution was to include a miner fee to make the transaction faster.
But almost all of us are sending a miners fee, since we compete so that our transactions are confirmed faster. Given this situations the company 21inc has made a platform to predict how much was the actual fee we need for a rapid transactions.
This is beneficial to indutries transacting large amount of bitcoins. But for common users like me who just make a small transactions it is not necessary and I prefer not using it. I am comfortable with the speed right now and I am contented with the services and operation of blockchain. But I am in support of that app since it has a beneficial effect on bitcoin. Miners will get an exact fee which may help and sustain the bitcoin mining industry.