Improve navigation

Of the four icons at the bottom, only two have a readily apparent purpose (gear and lock). Of the other two, one is unnecessary and the other is misplaced. I would put the settings gear and lock icons in the upper right. I would remove the graph icon since the user can just close the settings (with a "Back" or "Return" button) to go back to the main screen (where the accounts are listed). And finally, you can have a [+] add account button next to the accounts drop down list.

Alternatively, you can have tabs at the top where "Accounts" is one tab and "Tools/Settings" is another, and you can add additional tabs if/when needed in the future. Under settings you can have sub-items such as below.

Tab 1: Accounts
Tab 2: Tools/Settings
- Linked dApps
- Wallet back-up
- Wallet Timeout (hint hint)
- etc...