I like that Adapty.io makes subscription management easy for me, and I find all the analytics are free, which is great since it is free to use up to 10k. I'm happy with how I can use its app to track subscriptions and it works fine with Meta ads. Also, the initial setup is fast and easy nowadays. Review collected by and hosted on G2.com.
Maybe more readymade paywall design could be useful. Also, definitely at least one in-app purchase paywall design is needed. It wasn't good and free before, and also the documentation was not clear. We were thinking to change Adapty.io, but it improved itself, so we stuck with it. Review collected by and hosted on G2.com.