Free pregnancy exercise apps

Gaia • Intactivist, atheist, ex feminist, egalitarian, anti-idpol/anti-PC liberal, between a god and a simian

Which one do you use and why? Currently I just use the Downward Dog app, but I’m not sure how many of those exercises are good for prenatal as I get further along, so I’m looking for a few others to check out. If yoga is part of the regimen that would be a plus but it’s not necessary