Easily calculate discounts and consumption tax with this simple tool. Supports current tax rates and offers a home screen widget for quick calculations without opening the app. Customize rounding methods for precise results.
4.0.6
January 15, 2026
- Bugs related to update confirmation have been fixed.
Simply enter the original amount and scroll to select the desired discount rate. Zeitaku will then display the discounted price, including tax-exclusive and tax-inclusive calculations. The app also offers a tutorial for detailed guidance.
Yes, Zeitaku supports both the current 10% consumption tax rate and the reduced 8% tax rate. You can easily switch between these rates in the app's settings.
Yes, if you have iOS 17.0 or higher, you can add a Zeitaku widget to your home screen. This allows you to quickly calculate discounts and taxes directly from your home screen without launching the full application.
Zeitaku allows you to set the fractional calculation method for consumption tax and discount calculations. You can choose to round down, round up, or round to a specified decimal point, offering flexibility for different needs.
The free version of Zeitaku is ad-supported. A paid version is available that removes ads and offers additional features such as shopping memos and calculation result saving functions.
Yes, this app contains advertisements. Users seeking an ad-free experience can opt for the paid version of the application.
Zeitaku is available for iPhone, iPad, and iPod. It requires iOS 17.0 or higher for full functionality, including the home screen widget feature.
The latest version of Zeitaku is 4.0.6, last updated on January 15, 2026. While specific update frequency isn't detailed, this indicates ongoing development and support.
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