The number of downloads on playstore counts for nothing towards the security of a wallet, a wallet can have millions of downloads and yet be unsafe or not recommended. When looking for a wallet to use, things you should look out for is if the source code is open or closed, if the wallet is custodial or non custodial, you should also take into consideration the community's view/review about the wallet. If you pay attention to the number of downloads on playstore, you might download a bad wallet. Having said that, both trust wallet and safepal wallet are closed source, thus they aren't good options.