I am victim of one of these type of app, that was metro97. The interface was superb, customer services were outstanding as they were remain active to answer our queries. They were giving profit on time and so we get confidence on them. I received three times profits, people spend much more amount there. Many leading YouTubers started making videos in their favour. Suddenly one morning they wind up and run away. We all lost our money.
In my view never invest money except authentic exchanges, as OKX, KUCOIN, Binance etc.