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Kaikoku — Thou Shalt Set the Hour Free
A chuuni pocket-watch alarm from a real childhood notebook
An antique pocket watch that hangs from a physics-driven chain in your palm. Wind the dial by night to cast zodiac arcana; the sun seals your magic by day. Beneath the fantasy: real alarms, timers, a chronograph, Apple Watch sync, widgets & StandBy.
The short version: I found a notebook I wrote in junior high, and I turned it into an app.
Like a lot of kids, I filled a notebook with an entire "magic system" — twelve zodiac spells, solar arts, seal-curses, ranks you earn by casting. Pure chuuni. I forgot about it for decades. When I found it again, I didn't cringe. I thought: this deserves to actually exist.
So Kaikoku is an antique pocket watch that lives in your palm. The chain swings on real physics. You snap the hunter lid shut and power gathers; open it and the day unseals. By night you wind the dial to cast one of twelve arcana; by day the sun answers with solar arts instead. Every hour it checks its keeper by Face ID — strangers just get a magic circle.
Underneath all of that, it's a genuinely functional clock: alarms with six bells, an hourglass timer, a chronograph with Live Activities, an Apple Watch companion, widgets, and StandBy. The fantasy is the skin; the timekeeping is real.
Everything — every spell, art, and bell — is free. Ads keep the watch wound, and you can silence them forever with a one-time Pact if you like.
I'd love your honest feedback, especially from anyone who also kept one of those notebooks. What would your junior-high self have added? 🕰️
About Kaikoku — Thou Shalt Set the Hour Free on Product Hunt
“A chuuni pocket-watch alarm from a real childhood notebook”
Kaikoku — Thou Shalt Set the Hour Free was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #133 on the daily leaderboard. An antique pocket watch that hangs from a physics-driven chain in your palm. Wind the dial by night to cast zodiac arcana; the sun seals your magic by day. Beneath the fantasy: real alarms, timers, a chronograph, Apple Watch sync, widgets & StandBy.
On the analytics side, Kaikoku — Thou Shalt Set the Hour Free competes within iOS, Apple Watch and Apple — topics that collectively have 132k followers on Product Hunt. The dashboard above tracks how Kaikoku — Thou Shalt Set the Hour Free performed against the three products that launched closest to it on the same day.
Who hunted Kaikoku — Thou Shalt Set the Hour Free?
Kaikoku — Thou Shalt Set the Hour Free was hunted by 江上 博士. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Kaikoku — Thou Shalt Set the Hour Free including community comment highlights and product details, visit the product overview.
江上 博士