ハワイツール is a must-have app for Japanese travelers to Hawaii. This app offers several useful features to enhance the travel experience.

With the "Easy Tip Calculation" feature, users can easily calculate the tip amount when receiving services at restaurants, spas, and other establishments during their trip to Hawaii.

Additionally, users can also find out how much the total amount, including the tip, would be in Japanese yen. This "How much in Japanese yen?" feature is particularly helpful for shopping in Hawaii, as the prices of goods in Hawaii do not include the state tax.

By taking into account the tax, users can quickly calculate the total amount and see how much it would be in Japanese yen.

Both the "Easy Tip Calculation" and "How much in Japanese yen?" features provide the advantage of easily understanding the monetary value in Japanese yen, which can be helpful for those who are not accustomed to thinking in dollars.

The "Common Unit Conversion" feature allows users to easily convert commonly used American units that are different from those in Japan.

For example, weather forecasts in Hawaii are displayed in Fahrenheit, unlike in Japan. Additionally, some supermarkets in Hawaii sell products by weight in pounds (lb).

In such situations, this tool makes it convenient to quickly convert units and provides ease of use.