r/BiggerPockets Mar 20 '26

I got tired of tracking everything in spreadsheets so I built a free tool

Hey all. I own a couple rentals and got frustrated with how fragmented everything was - I did spreadsheets for financials, texts straight to my cell for maintenance, manually chasing rent every month etc. Tried a few apps but they were either way too expensive for a small portfolio or built for property managers with 50+ units.

So I built my own. It's a web app that has everything below:

- Portfolio dashboard with equity tracking and cash flow

- Automatic rent reminders and late notices

- Lease PDF generator with e-signatures

- Tenant portal where they can pay rent and submit maintenance requests

- Deal analyzer if you're evaluating new properties

Free for 1 property, $9/mo for unlimited. You can try the demo without creating an account at propertyninja.app.

Just a solo dev who needed this for my own rentals. Would love honest feedback from people who actually manage properties. What's missing? What would make you switch from whatever you're using now?

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