MacroDroid might be a bit more popular than Expresso. We know about 2 links to it since March 2021 and only 2 links to Expresso. 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.
Working in PowerShell (.Net regex) one of my favorite tools is https://ultrapico.com/expresso.htm. It does require registering for a free license but it's well worth it. Source: about 2 years ago
Then you need this or something like it: https://ultrapico.com/expresso.htm. Source: over 2 years ago
Fairly granular I'd say, there's a bunch of customizations and workflows you could go through. I'm probably not your best resource for this though. Look here: https://macrodroid.com/. Source: over 2 years ago
I see many recommending Tasker. If you want an Android automation software, macrodroid is way easier and as powerful as Tasker. https://macrodroid.com/. Source: almost 3 years ago
RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.
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rubular - A ruby based regular expression editor
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regular expressions 101 - Extensive regex tester and debugger with highlighting for PHP, PCRE, Python and JavaScript.
AutomateIt - Automate Your Android!