I am not aware of any tool for this. Twitter famously closed off its API, which shut off access to most tools for automating tweets. Substack has never had an API, which makes it difficult to build public-facing tools that work reliably.
I am not aware of any tool for this. Twitter famously closed off its API, which shut off access to most tools for automating tweets. Substack has never had an API, which makes it difficult to build public-facing tools that work reliably.