Bet Angel works on the Betfair and Betdaq betting exchanges. You can download these version independently of each other here: -
Bet Angel is currently not compatible with Matchbook, Smarkets or any other betting exchange or third party bookmaker.
If you would like to see support for these exchanges, please contact the exchange and tell them you want Bet Angel on their platform. Typically without additional support we will be unable to fund development for these exchanges.