I can resist anything except temptation

Seriously though, if you say "akrasia" is a codeword for "lazy as fuck" (or whatever), you've just replaced one symbol with another. Have you made any progress? If you found yourself going to bed an hour or two later than is optimal, and you said "aha! I'm not akraitic, I'm lazy as fuck!", how would that help you?

People often say "just have some self discipline!", but that is like saying to a beggar "just cause money to exist in your pocket!" - it's stating the obvious.

Having an app that shuts the phone down is a way of achieving your goals with the self discipline you already have, and it is something you can actually do. It's specific and actionable.