Looking for a partner to build an FI app

Hey everyone!

I hope this kind of post is allowed. Not here to advertise.

I’m exploring the idea of building a mobile app specifically for the financial independence (FI/FIRE) community.

I’m also looking for a partner to help fill a product-focused role. This person would help define how features should work to best serve FI users, collect and synthesize user feedback, and help validate product/market fit. Familiarity with existing finance apps and an interest in FI are more important than formal credentials (self-taught finance knowledge is totally fine).

To be clear, I would handle all of the engineering.

Below are some rough, early feature ideas. I'm very much open to change or feedback:

Net Worth Tracking

• Assets & liabilities with net worth over time
• Monthly “on/off track” FI indicators with explanations
• Optional third-party integrations
• Manual-first / offline mode

Cash Flow & Spending

• Monthly income vs. expenses
• Category breakdowns and rolling averages (3/6/12 mo)
• Savings rate calculation
• Optional integrations
• Sankey-style flow visualization (example)
• Support for post-retirement income (pensions, rentals, BaristaFIRE, etc.)

FI Number & Progress

• FI number based on user-defined expenses and withdrawal rate
• Progress tracking and estimated years to FI

Scenario Modeling (“What if?”)

• Historical market stress testing
• Expense, savings, and return-rate changes
• Early retirement timing scenarios
• Side-by-side comparisons

Investment & Withdrawal Planning

• Asset allocation and glide paths
• Roth ladder tracking
• Sequence-of-returns simulations
• Withdrawal order modeling and guardrail strategies (e.g. Guyton-Klinger)

If any of this resonates (or if you think I’m missing the mark) I’d love to hear your thoughts.

Thanks!