Only the current version so far — new entries appear as the app ships updates.
残りの人生 is a lifestyle app by yotsufe with 10+ downloads (about 11 estimated). +3 installs in the last 7 days. Install growth, rank history, SDKs and ad networks.
From the store listing: “A real-time display of your remaining lifespan. Countdown based on your birth date and estimated lifespan. A management app that helps you be mindful of your limited time.”