Type a price, apply a discount, flip tax-inclusive/exclusive - RetailCalc Pro calculates Japan's consumption tax instantly, floor-rounded like real cash registers. Japan is weighing a cut to the reduced tax rate on groceries, from 8% to 1%, for two years from April 2027 - I shipped a dedicated 1% option within days of the news. Also included: calculation history, customizable rates, dark mode. Free for 10 calcs/day, one-time unlock for unlimited use. No ads, no subscription.
Hey Product Hunt 👋
I'm Tomohiko, a solo indie dev in Japan. I build small, focused iPhone (and sometimes Android) apps - a reversi game with an expanding board, a couple of photo-sorting tools, and now this: a tax calculator.
The reason I'm launching it today: Japan's government is currently weighing whether to temporarily cut the reduced consumption-tax rate on groceries from 8% to 1%, for two years starting April 2027. It's a real, active policy debate - not hypothetical. I wanted to see the actual numbers, so I added a "1%" option to my own tax calculator app within a few days of the news breaking.
RetailCalc Pro itself is intentionally simple: type a price, apply a discount, flip between tax-inclusive/exclusive, done. No account, no ads on the core flow, works offline. Free for 10 calculations/day, one-time unlock for unlimited use.
Would love feedback - especially from anyone who deals with retail pricing, accounting, or just wants to sanity-check Japan's tax math. And if you've got thoughts on what a "policy-reactive" utility app like this should do next, I'm all ears.