くじらの内海 is a free lifestyle app developed by UtsumiInc. This app is designed for car owners in Fukuyama City, Kasaoka City, and Kurashiki City, who visit gas stations marked with a whale icon. The app provides useful information to make customers' car life more comfortable and convenient. It also offers features such as car wash reservation services for each store and a consultation service for car-related inquiries.

One of the unique features of this app is the ability to earn stamps by sharing the useful information received through the app on Facebook or Twitter. When users collect 30 stamps, they can enjoy special benefits at the gas stations.

The app includes several functions to enhance the car owner's experience. Users can access exclusive coupons for discounts at the kuji no utsumi gas stations through the "くじらの内海クーポン" feature. Push notifications are sent whenever new coupons are available. The app also provides the latest information, including announcements and event previews, directly from kuji no utsumi. Users can also find a list of services offered at each store and interesting car-related trivia. Additionally, there is a QR code reader feature that allows users to collect stamps by scanning QR codes displayed at the gas stations. The app also includes a car inspection reminder feature that notifies users of their inspection expiration dates and offers special services. Lastly, users can find access information for each kuji no utsumi store in the "店舗一覧設定" section.

Please note that the app requires a mobile network or Wi-Fi connection to display the latest fair and store information. If there is no network connection upon launching the app, the latest information may not be available.