I have been using Trade Republic for the last few weeks I am happy with the app and the cost of transaction. I also have an account with IB and my bank (The bank is too expensive but trades on most of the exchanges in Germany). I have IB to buy stocks not listed in Germany. IB fees are also priced easy with a $ 1 minimum fee for stocks on U.S exchanges. The only issue with TR is there is no support phone number listed. I have some Tax related questions that I have sent them over mail. I hope someone contacts me with an answer or a support desk number.