They say zero fees but purchase cost is higher than actual and selling is lower. So far costs are just over 1% per transaction (now nearer 3-5%). Add to that the fact I can only add funds in $ (for London based bank), requiring substantial bank charges. The app itself is lacking functionality available in other stock apps including auto buy/sell at specified values, auto adding transactions to portfolio, checking exact prices at specified times, app keeps requiring full login, the list goes on.