I made the app free, but it required too much money for support and development:
I pay programmers to develop and maintain the app every month
I pay fitness trainers to write programs
I pay voice actors with voice training sessions
I pay the sound engineer who adds music to the voice
I pay Facebook for advertising so as many older people as possible will know about the app. Advertising is costly
I spent just over $50,000 over the last six months, and my expenses continue to grow.
So I made the app paid. I set a price of $48 a year. But not all older people can afford it.