Existing habit trackers often force users into predefined patterns that don't match their lives. A fully customizable tracker would let users define their own metrics and success criteria.
Create an app where users can set custom intervals, define partial completions, and track unconventional habits.
Charge for premium customization features after a free basic version.
The MVP could focus on just a few flexible tracking templates.
The challenge is balancing simplicity with the depth of customization users demand.