I see you are using coingecko data, and I think they also have some kind of portfolio tracker available.
Back in the old days I was testing several portfolio tracker, but none of them meet my strict criteria.
There was one app called Rotki that was open source, and you could download it and use on your computer.
Everything else, inlcuding OP app, is web version and I don't know who is collecting information I enter with my IP address.
Thank you for bringing this u, it’s a fair concern, and I appreciate the question.
I’ve updated btcprice.app’s Privacy Policy to explain exactly how it works: positions, amounts, optional buy prices, Watchlist items, and preferences are stored locally on the user’s device. The app does not require wallet connections, message signing, or accounts, and I do not run a portfolio database or store user balances.
I also clarified that CoinGecko’s CDN and Coinbase live ticks may process normal connection metadata such as an IP address. They do not receive portfolio balances, amounts, totals, buy prices, wallet credentials, or private keys. CoinGecko price requests identify requested assets, not how much anyone holds.
I’ll keep working on ways to reduce third-party exposure further, and I intend to open-source the project once I’ve finished preparing it properly. Thanks again for bringing this up!