Transactions on money making apps can be secure or insecure depending upon the money earning app you decide to go with. If you go with a genuine money making app, you need not worry about transaction security at all. However, I always recommend getting the money deposited in a secondary account rather than your main account. Also, avoid submitting any sort of confidential information on any app whenever it is not required. Just some alertness here would ensure that you don't become a victim of any scam.