Lucky Day Calendar is a lifestyle app developed by ZAPPALLAS INC. It provides users with a convenient way to discover their lucky days based on various auspicious occasions such as "Ichi-ryu-manbai" (a day believed to multiply one's efforts), "Tensha-nichi" (a day of divine forgiveness), "Taian" (a lucky day), "Shinshuku" (a new moon), and "Mangetsu" (a full moon). By planning their schedules around these fortunate days, users can strive to have a more enjoyable and fulfilling life.

The app also offers explanations for the different terms related to lucky days, such as "Ichi-ryu-manbai," "Tensha-nichi," and "Akakuchi," ensuring that users can understand the significance of each term. Additionally, users can explore their own "Tenboshi Type" based on the astrological predictions shared by the famous astrologer Hoshi Hitomi on the TV show "Totsuzen Desu ga Uranatte Mōiidesuka?".

Furthermore, users have the option to check their fortune for the year by purchasing the "Unsei" (fortune) feature within the app. This feature is curated by well-known fortune-tellers who have appeared on the TV show, providing users with a luxurious reading experience.

Lucky Day Calendar also offers a monthly subscription service that provides users with their personalized lucky days. This exclusive feature ensures that users can enjoy daily and monthly fortunes tailored specifically to them, making each day more exciting.

Please note that the app's terms of use and privacy policy can be found on the respective links provided.