Kurisaku Launches AI-Assisted Alarm Calendar App “Akaru | Alarm Calendar” on the App Store

Kurisaku Inc., based in Shibuya, Tokyo, launched the alarm calendar app “Akaru | Alarm Calendar” on the App Store on May 10, 2026. The app was developed with the use of generative AI, and its basic features are available for free. Download URL: https://apps.apple.com/jp/app/id6760894435 “Akaru | Alarm Calendar” is an app that lets users set alarm rules by weekday and public holiday, then check their wake-up times for each date on a calendar. For example, users can set weekdays to 7:00, Saturdays to 10:00, and public holidays to OFF. By setting this kind of lifestyle pattern once, users can reduce the need to manually change alarms every night. The app is designed for people who have woken up to their usual weekday alarm on a public holiday, as well as those whose wake-up times vary depending on shift work, office or remote workdays, preparing children’s lunches, and other daily routines. Its goal is to make everyday alarm management easier to understand. The app was also developed with generative AI across multiple stages, including planning, requirements definition, code creation support, landing page production, and promotional image and video creation. As an example of a planning and production process using generative AI, the company also introduces the background behind the service. Background: Addressing the everyday inconvenience of “waking up to the usual alarm even though it is a public holiday” Smartphone alarms are a feature many people use daily. However, wake-up times are not always the same every day. People may wake up early on weekdays, a little later on Saturdays, and prefer no alarm on public holidays. Wake-up times may differ between office days and remote workdays. Shift workers may wake up at different times depending on early shifts, day shifts, night shifts, or days off. Some people need to wake up earlier only on days when they prepare lunch boxes for children or attend events. In these lifestyles, users need to check the next day’s schedule and manually adjust their alarms. If they forget, they may wake up to their usual weekday alarm on a day off, or the alarm may not match the time needed on an important day. These small nightly checks and setting changes are hard to see, but they accumulate as a kind of everyday, unnamed stress. Akaru was planned and developed to reduce this nightly alarm adjustment burden. Key Features of Akaru 1. View wake-up times by date on a calendar Akaru displays each day’s alarm time on a monthly calendar. Since entries such as “7:00,” “10:00,” and “OFF” are visible by date, users can check not only tomorrow’s alarm but also their wake-up schedule for the month. 2. Set weekday and public holiday rules once Users can set alarm rules based on their lifestyle patterns, such as weekdays, Saturdays, Sundays, and public holidays. For example, setting weekdays to 7:00, Saturdays to 10:00, and Sundays and public holidays to OFF allows alarm times to be applied according to each day’s conditions. 3. Change only specific dates individually The app also supports schedule changes such as “I want to wake up early only on this day” or “I do not want the alarm to ring only on this day.” Users can select a date from the calendar and change the alarm time only for that day. 4. Support for public holiday rules Users can turn off alarms on public holidays or set them to a different time from usual. This is useful for people who want to avoid having the same alarm ring on holidays or public holidays as on weekdays. 5. Support for iPhone alarm functionality Akaru supports alarm functionality using iPhone’s AlarmKit. The app was developed with repeated real-device testing and verification, aiming for a design that is easy to use as a daily wake-up alarm. Recommended For People who sometimes wake up to their usual alarm on holidays or public holidays; people whose wake-up times differ between weekdays and weekends; people whose wake-up times differ between office days and remote workdays; shift workers whose wake-up times vary by day; people who need to wake up early only on days for children’s lunch preparation or events; people who find it troublesome to reset alarms every night; and people who want to check their monthly wake-up schedule on a calendar. Example Usage Users can set rules such as: Weekdays: 7:00 Saturday: 10:00 Sunday: OFF Public holidays: OFF Once these rules are set, users can check their wake-up times for each day on the calendar. They can also make date-specific changes from the calendar, such as “I want to wake up at 6:00 only next Wednesday” or “I want to turn the alarm off only on this day.” Planning and Production Process Using Generative AI Akaru used generative AI across development and communication workflows, including planning, requirements definition, code creation support, landing page production, App Store listing copy, and promotional image and video production. By using generative AI for idea development, specification organization, UI improvement, and promotional expression review, the company was able to move quickly from planning to release preparation in-house. At the same time, human review and improvement remained essential for verifying whether alarms ring correctly, confirming operation on real devices, and responding to App Store review requirements. While generative AI greatly increased the speed of planning and production, the company also found that steady verification and improvement are ultimately important for apps related to daily life. Comment from Kurisaku Inc. Smartphone alarms are used daily, but wake-up times are not always the same every day. There are many situations where alarms need to be adjusted according to life rhythms, including weekdays, Saturdays, public holidays, office days, remote workdays, and children’s events. With Akaru, we aimed to create an experience where users can manage alarms on a calendar rather than as a list of times, making daily wake-up times easier to understand. We will continue focusing on small inconveniences in daily life and, while making use of technologies such as generative AI, work to create services that slightly reduce everyday burdens. Pricing Plans Akaru’s basic features are available for free. The free plan includes monthly calendar display, weekday rules, public holiday rules, and alarm functionality. The Premium plan includes features such as individual date adjustments, additional alarms, weekday rules for the Nth week of the month, and ad removal. Free plan: 0 yen Premium plan: 300 yen per month App Overview App name: Akaru | Alarm Calendar Price: Basic features free, with in-app purchases available (300 yen per month) Supported OS: iOS 26.2 or later Download URL: App Store Information page: https://app.kurisaku.com/akaru/ Company Overview Company name: Kurisaku Inc. Representative: Jun Noguchi, Representative Director Location: Wind Ebisu Building 8F, 2-4-8 Ebisunishi, Shibuya-ku, Tokyo Established: November 26, 2025 Business: Planning and development of web services and smartphone apps; planning and operation of education businesses; marketing support; planning, production, and distribution of digital content URL: https://kurisaku.com/