blockchain is Best low fee + high security But not Recommended for phone Because i have many problem when linked to my android device
Best fee, I can go with that
but best security ?
Do not ever consider a centralized wallet to have the best security. Anything can happen to that wallet or it might just get closed down and if such thing happens, your funds are gone and you cannot retrieve them back. That is what makes them less secure compared to when you are using a decentralized wallet.