Tomohiko Saitoh's profile on Product Hunt

About

Solo developer in Japan, shipping small iPhone games alone. Most recently Reversi NEXT, where the board expands past 8x8 mid-match and new corners appear, so a losing position can turn. I spend most of my time hand-tuning the 20 AI rivals until they feel fair.

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Tastemaker

Gone streaking 10

Gone streaking

Gone streaking 5

Maker History

Noodle TimerA cup noodle timer that shows firmness, not just a countdown
Sep 2026
Bear HornTurn your phone into a loud bear-deterrent horn for hikes
Aug 2026
RetailCalc ProA Japan tax calculator that shipped the new 1% rate in days
Aug 2026
Still BoxAn offline vault for your private photos and videos
Aug 2026
SpeedShotAn iPhone camera that turns into an AI speed gun
Aug 2026

Forums

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1mo ago

Noodle Timer - A cup noodle timer that shows firmness, not just a countdown

Noodle Timer turns cook time into a live, five-stage firmness meter — Firm to Soft — instead of a plain countdown. Forget your cup? An overtime alert pings every 15 seconds until you catch it. It also logs every bowl: weekly, monthly and yearly charts of your noodle habits, plus a ramen log with shop, rating, category and photo for every cup. Free, offline, no account, 10 languages. Just a small banner ad — no subscriptions, no premium tier.

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2mo ago

Bear Horn - Turn your phone into a loud bear-deterrent horn for hikes

Bear Horn turns your iPhone into a loud bear-deterrent horn for hikes and campsites — no separate gadget to buy or charge, just your phone at full volume. 10 sound types: hiking bells, a barking dog, a wolf howl, human conversation, a campfire, and more. Random intervals avoid a robotic loop. Fully offline. No account, no data collected. One-time purchase, no subscription. Also on Android as "Mountain Bell."

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2mo ago

RetailCalc Pro - A Japan tax calculator that shipped the new 1% rate in days

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.