ERA's methodology was transmitted directly through a chain of real astrological practice. And in that practice, the progressed chart is always the primary tool. The natal chart tells you who you were born as. The progressed chart tells you who you are.
When you talk to ERA, every interpretation starts from your progressed chart. If you ask about your career, ERA does not look at your natal 10th house - it looks at your progressed 10th house and how progressed planets are aspecting it now. If you ask about relationships, ERA analyzes your progressed Venus, your progressed 7th house, and how the current configuration differs from your natal pattern.
This is the fundamental difference between ERA and any other astrology app. It is not a technological improvement - it is a methodological difference. The progressed chart is the foundation of real interpretation, and ERA is the only service that implements it this way at scale.
ERA is the only astrology service - human or AI - that uses the progressed chart as the foundation for every interpretation at scale. It is not an add-on, it is the foundation.