消費税10電卓 is a free Android application developed by Blacksmith DoubleCircle. It is a tax calculator that can easily calculate a 10% consumption tax, as well as the previous 8% tax rate and reduced tax rates. The app offers a variety of functions, including calculating pre-tax prices, post-tax prices, and tax amounts. With the ability to write out equations, the app is both user-friendly and speedy, providing instant results.

The app also includes a %OFF calculation function, which can handle even complex discount calculations. In addition, it has a color customization feature, offering 23 different color patterns. The app provides a clear explanation of reduced tax rates, which can help users better understand the concept. The app is also able to calculate pre-tax prices based on post-tax prices.