I code for a living, albeit not as an app developer, but in academia.

A gamechanger for me in terms of fighting procrastination has been a combination of:

• www.focusmate.com (you share the screen for one hour with someone else who is trying to get a task done)
• journaling almost everything I do. At the beginning/end of the week and day for big picture, and at the beginning or end of each focusmate session for readjusting my focus, i.e. write down what I did well, what I need to change, what is my next immediate task, etc. I use vimwiki for this, but there are many other tools (my colleague is into obsidian https://obsidian.md/ quite heavily).
• tell my colleagues NOT to interrupt me when I have my headphones on (this means I am "in the zone", and coding).

As a side note, I've been tinkering with the idea of building a nostr client which does a similar thing as focusmate.com, but with the additional advantage of using LN micropayments to pressure yourself into working (you lose the bounty if you didn't do what you committed to).