I was guided to SmartCheck - another audio checklist available for iOS devices on the Apple App store. Its $14.99 plus another $3.99 for the MacOS editor to build your own lists. The developer is responsive to questions…
Its not a bad alternative - doesn’t have the conditional branching or similar features - plus the speech reading rate (even on Fast) is still too slow for my taste.
Other alternatives are ForeFlight or Gamrin Pilot.
From some anecdotal research, there are few pilots who use audio checklists. I suspect the economics for a commercial app simply aren’t there - likely why Miralou sold to Aerosys and why there is no support or even presence from Mirko Hahn.
Sadly, Goose appears to be a dead duck.
Maybe Aerosys would consider putting the app out as Open Source and see whether the community could provided ongoing support and operation.
Stu