I believe @Aleman has it right.So I do not need their special SW to upgrade the firmware ... just the app on my iphone ?
On more thing ... read about issues on the tacx neo and long derailleurs - is that special to just mountain bikes ? My road bike is shimano 105 end to end. Nothing special
I bought a Neo this year. I've installed the Tach App on my iPhone which allows you to upgrade the Neo firmware and carry out diagnostic checks.
The only Tacx software I'm aware of is their Sim, which is as @Aleman describes. I haven't used my 30 day trial yet, but will probably do so this winter.