Delta might be a bit more popular than Portfolio Performance. We know about 1 link to it since March 2021 and only 1 link to Portfolio Performance. 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.
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
The one with getdelta.io is different, it returned HTTP 404, which "indicates that the origin server did not find a current representation for the target resource or is not willing to disclose that one exists.". Source: about 1 year ago
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