How about an advanced or expert user mode where I can select which inputs I want to use and lets me spend unconfirmed transactions. Also include RBF (replace-by-fee) and CPFP (child pays for parent) so that I can get some unconfirmed transaction confirmed.
The idea is to cater to the mainstream user, not the expert user.
A security pin will most definitely be used.
I was more wondering if you all wanted some other features that these other mobile wallets didn't have.
How about finger verification? or retina verify? I think it's didn't have, although i don't have idea how to make it, but it will be great and maybe will make your app famous because this feature is rare, even didn't have for bitcoin wallet.
This is something I think the average user is not really interested in.