My Final Words for this tori be say wallet apps fit stop work or even vanish from play/app store, hardware wallet fit old or spoil da one sef dey, but ur seed phrase wey be the master- key go still remain valid as long as blockchain still dey alive.
What happens when you store your coin in an exchange that ends up being hacked? What will then be the use of your seed phrase? Seed phrase is important but as much as it's important, the wallet one uses is also important.
There's not supposed to be a comparison between seed phrase and wallet because all wallet have seed phrase but not all wallet are secured which makes it necessary that one choose the right wallet that's safest and isn't subsciptible to hack. Hardware wallet gives you full control of your coin but if you're using anyhow wallet like a random exchange, it's as if you're giving the exchange the right over your coin.