A straightforward and user-friendly calculator app designed for focused calculations. It displays the entire calculation process, reducing errors and offering standard functions comparable to physical calculators.



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A straightforward and user-friendly calculator app designed for focused calculations. It displays the entire calculation process, reducing errors and offering standard functions comparable to physical calculators.






Easily convert between Western and Japanese eras, and determine birth years from age. Explore historical context with explanations for era changes and significant events of each year.






Easily read your transportation and electronic money IC cards to check balances and transaction history. Data can be automatically sent to budgeting or expense tracking apps, or exported as a CSV file for further analysis.




Easily check the balance and usage history of various Japanese transit and e-money cards directly on your iPhone. Supports a wide range of IC cards and payment services for convenient financial tracking.


This utility app offers a collection of essential tools for daily life, including a flashlight, ruler, level, and decibel meter. It also features real-time intercom and online translation capabilities. Discover more hidden functions within this compact and powerful toolbox.


This smart lock offers hands-free unlocking by automatically detecting your approach. It also features auto-locking when the door is closed and allows for easy key sharing with family and friends. Remote operation and notifications are available with an optional hub.