The last commit was three weeks ago. The last release was 2022.
So anything after 2022 you need to build from source to use.
I thought the same thing but it actually does have a limited free plan. Seems like, similar to BW, it restricts 2FA behind the pass, but also with the pass you get unlimited hide-my-email aliases, multiple vaults to organize in (I don’t know what this means), and eventually autofill credit cards.
This is quite a bit more expensive than BW’s paid plan though. Not sure what all differences it has to BW otherwise.
The Play Store is also using version 1.5.2 released in May 2022