Only the current version so far — new entries appear as the app ships updates.
パートナーの生理周期を共有:ペアリズムM(男性用) is a medical app by PINO ASSOCIATES, INC. with 10,000+ downloads (about 47K estimated). +22 installs in the last 7 days. Install growth, rank history, SDKs and ad networks.
From the store listing: “Share your partner's menstrual cycle with this free menstrual app for men.
Use it with your significant other for fertility, birth control, health management, and more.
(Sharing is available on Android only.)”