# Discount Calculator Zeitaku — Includes Calculator Widget

> Free, simple calculator for discounts and consumption tax with widget support. (iPhone/iPad app by NISHI TAKASHI.)

- Source: https://appshunter.io/ios/app/discount-calculator-zeitaku/id837194944 (this page in markdown: same URL + `.md`)
- Developer: [NISHI TAKASHI](https://appshunter.io/developer/837194947)
- Category: Productivity, Finance
- Price: Free
- Rating: 4.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 14.0 · 5 MB
- Languages: American English, Japanese
- Released: 2014-03-13
- Data updated: 2026-07-07
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/discount-calculator-zeitaku/id837194944/reviews.md

## What is Discount Calculator Zeitaku?

Free, easy, simple, and quick to use!

"20% OFF" "30% off"... If you're not good at calculating discounts, leave it to Zeitaku!

How much is the consumption tax? ... It's fine when you're stuck in a store that displays prices excluding tax or when you want to know the base price.

This is a convenient and easy consumption tax and discount calculator that supports the consumption tax rate of 10% and the reduced tax rate of 8%.

If you have iOS 17.0 or higher, you can add a "widget" to your home screen and quickly calculate discounts without launching the app.

--How to use--

Just enter the amount.

Scroll through the discount rates to select the discount rate.

For more information, please see the tutorial in the app.

*Supports tax-exclusive and tax-inclusive (tax-exclusive and tax-inclusive)

You can select tax-exclusive or tax-inclusive from the "tax-inclusive/tax-exclusive button" or the settings button on the center left of the screen.

If you select tax-exclusive, enter the price excluding tax to display the price including tax.

If you select tax-inclusive, enter the price including tax to display the base price.

*Tax rate

The consumption tax rate can be switched between 8% and 10%.

*Discount calculation/% calculation
You can calculate the percentage off or discount.
When entering tax-excluded amounts, the discount tax-excluded amount, consumption tax, discount tax included, and the difference are displayed.
When entering tax-included amounts, the discount tax included and the difference are displayed.

*Entering decimal points
You can enter decimal points by pressing and holding the "0" key.

*Fixing the discount rate
If you turn on the fixed discount rate in the settings screen, you can calculate more efficiently when calculating multiple times with the same discount rate. If you turn it off, the discount rate will be cleared to 0 when you press the [C] key.

*Setting the fractional calculation method
You can set the fractional calculation method for consumption tax calculation and discount calculation as an option.
You can choose to round down, round up, or round to the specified decimal point.
When entering tax-excluded amounts for discount calculation, the discount tax-excluded amount will be rounded.
When entering tax-included amounts for discount calculation, the discount tax included amount will be rounded.

*About the paid version and other related apps
This app is also available in a paid version. You can use shopping memos, calculation result saving functions, and more without ads.

◆NEW!! The "Tax Table R for Reduced Tax Rates" app has arrived
This is a convenient app for when you want to calculate the total amount of your shopping or for each tax rate, and it also has a shopping memo function, so please give it a try.

*Fractional treatment of consumption tax varies depending on the store, and may differ from what is displayed in this app.
*This app does not guarantee accurate amount display. Also, please note that we cannot take any responsibility for any trouble that occurs in relation to the use of this app.

●●●Introduced on BS11's "Doppuri App"●●●
●●●Introduced on TBS Radio's "Hiroshi Ikushima's Good Morning Straight Line"●●●

## Key features

- Discount calculation
- Consumption tax calculation (8% and 10%)
- Tax-inclusive and tax-exclusive modes
- Home screen widget
- Customizable rounding methods
- Fixed discount rate option


## Frequently asked questions about Discount Calculator Zeitaku

### How do I calculate discounts with Zeitaku?

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.

### Does Zeitaku support different tax rates?

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.

### Can I use Zeitaku without opening the app?

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.

### How does Zeitaku handle rounding for tax calculations?

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.

### What is the difference between the free and paid versions of Zeitaku?

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.

### Does Zeitaku have ads?

Yes, this app contains advertisements. Users seeking an ad-free experience can opt for the paid version of the application.

### What devices is Zeitaku compatible with?

Zeitaku is available for iPhone, iPad, and iPod. It requires iOS 17.0 or higher for full functionality, including the home screen widget feature.

### How often is Zeitaku updated?

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.

## Version history (last 5 releases)

### 4.0.6 — 2026-01-15

- Bugs related to update confirmation have been fixed.

### 4.0.5 — 2026-01-13

- App information has been changed.
- Bugs related to update confirmation have been fixed.

### 4.0.4 — 2025-09-16

- Fixed a bug where the input area was not displayed on iOS26

### 4.0.3 — 2024-11-06

- Fixed an issue where some input buttons were not displayed under certain conditions.

### 4.0.2 — 2024-11-05

- Fixed an issue with update notifications
- Added explanation of discount calculation widget

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## More apps by NISHI TAKASHI

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- [Mimamonitor](https://appshunter.io/ios/app/mimamonitor/id1482415553)

All apps by NISHI TAKASHI: https://appshunter.io/developer/837194947

## Related topics

[discount calculator zeitaku](https://appshunter.io/ios/topics/discount-calculator-zeitaku)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-07.*