I know there are trackers out there. I used most of them. The problem I kept running into was either they wanted custody, they were clunky, or they mixed crypto into a general portfolio in a way that felt off for someone who thinks about Bitcoin differently than the rest of the market. Also, when you see things through a fiat lens you don't really value it. For example, spending $5 on coffee every day doesn't seem like a lot, until you realize how much money that is in Bitcoin that you spent.

I wanted something that:

- Works with your xpub so it's read-only OR just enter manual amount

- Shows fiat equivalent in your local currency

- Doesn't require KYC or an account on some exchange

- Changes the psychology of how you see daily money

- Looks decent on mobile

The xpub piece took longer than I expected. Deriving addresses, querying the mempool, handling different derivation paths for different wallet types... it's more nuance than it looks from the outside.

Three things I learned building this:

1. Most people don't understand what an xpub is or why it matters. The education gap is real.
2. Privacy-conscious users will test you. I had people ask good technical questions before they'd even try the app.
3. "Simple" is really hard. Every feature I added, I asked myself if a new Bitcoiner could understand it in 30 seconds.

If you want to see what I ended up with, it's called Compass. Not trying to sell anything, just sharing the build story. Feedback from this sub would actually be useful. Link in comments

Happy 4th of July to those who celebrate. Bitcoin may kill the dollar but that doesn't mean it's anti-American. in fact it’s hyper-American. It’s rebellion money.
It’s freedom tech. Bitcoin is the most American idea since 1776. it gives you the power to opt out of inflation, rigged systems, and unelected money printers. It’s the real American Dream.

I think he's gonna make it.