There are many shady wallets in crypto space today, wallets I've never heard from anyone or reviews online, you guys need to be careful when going on playstore to download, remember some have backdoors hidden in them, they will give users recovery seed they already have control over,
1. Totalcoin Bitcoin wallet
2. Mercuryo Bitcoin wallet
3. Bitnovo
There are many complains regarding funds lost and lost access to coins from these wallets and there are many more, do not use wallets that aren't popular and keep your keys safe, GoodLuck.
The only bitccoin wallet that I've been using so far was ELECTRUM only, aside from this nothing else.
But if you can afford to buy ledger nano is much more good but as long as you don't have budget for ledger nano, you can
use Electrum or some on which you think is safe just do check them first before trying to use em.