Portfolio Performance might be a bit more popular than JStock. We know about 1 link to it since March 2021 and only 1 link to JStock. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I like JStock, got it on my Win10 laptop and 2 android devices. Works very well for tracking my investments, aka my losses. (No more meme stocks, I'll just stick to ETFs, thank you. ). Source: over 2 years ago
To keep track of investment performance I use the open source tool PortfolioPerformance. It’s stored locally and not in the cloud (like an excel sheet) and gives a pretty nice interface with stats and graphs. (See: https://portfolio-performance.info). Source: almost 2 years ago
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