I used to track my investments in a spreadsheet, but over time I got increasingly frustrated with its limitations. So I started working on a web service to replace it. At the beginning of 2021 I resigned from my day job to focus on Statfolio full-time. Since then, the product improved a lot. And this is just the beginning. I have a lot more features planed/in progress (advanced charting, stock screener, technical analysis, analyst scores, stock ownership and shareholder trades, support for crypto, support for European stocks etc). Feel free to take a look, there's a demo account and also a free plan to get started.