Wealthfolio

Wealthfolio is an open-source portfolio tracker that runs locally on your device, meaning your financial data never leaves your computer unless you choose to sync it. The app encrypts your holdings and cost basis on your device, then syncs across your phone, tablet, and desktop. You can add manual positions or connect your brokerage via integrations, and the app calculates your net worth, gains, and asset allocation in real time.

This appeals to privacy-conscious investors who want full control over their financial information and don't trust cloud storage providers. If you're technical and comfortable using an open-source tool (which means you can audit the code yourself), the transparency and offline capability are strong draws. For investors who need to access their portfolio from shared devices or want cloud backup for convenience, a cloud-based service might be more practical.