There are now chi exercise machines to suit most people’s budget and with various types of design, functionality and build quality.

Since the original Chi Machine^® was invented in 1990, other manufacturers have come up with alternatives. These can be categorized as follows:

1. Cheaper versions of the original Chi Machine^® with similar functionality but inferior build and/or engineering quality.
2. More advanced versions with superior build and/or functionality and/or added features.
3. Chi exercise machines that also offer other features – that is, ancillary features that allow users to utilize the same device for other purposes.

For more details of how later chi exercise machines differ from the original, please go to Later Developments.