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  • Kaikoku: Pocket Watch Alarm screenshot 1
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  • Kaikoku: Pocket Watch Alarm screenshot 3
  • Kaikoku: Pocket Watch Alarm screenshot 4

About Kaikoku: Pocket Watch Alarm

Kaikoku is a classic × chuuni pocket-watch alarm app — built from a notebook the developer wrote in junior high and rediscovered decades later. An antique pocket watch hangs from a real-physics chain in your palm. Snap the hunter lid shut and power gathers; open it and the day is unsealed. By night, wind the dial to cast one of twelve zodiac arcana. By day the sun seals your sorcery — six solar arts answer instead. Shut the lid and wind, and six seal-curses act upon the lid itself. Rites await: cover the sensor to summon a fleeting night; touch a torn page of forbidden curses and the watch examines its keeper by Face ID — the owner unseals the chapter, while a stranger is shown a magic circle bearing an inviting sigil. Spin too far — thirty-six turns, one full day of the arcane world — and the chain sunders, until you resummon the watch by rite. It keeps real time too: alarms with six bells, a magic hourglass timer, a chronograph with Live Activities, an Apple Watch companion that resonates with your pocket watch, widgets, StandBy, and a wall-pinned grimoire recording your deeds and chants. On iPhone Duo the watch follows the fold: closed, open or half-folded, the dial and its chambers arrange themselves to suit each pose. Every spell, art, and bell is free. Ads help keep the watch wound — forge the Pact (lifelong or monthly) to still them for good, or invoke a brief Farsight rite to send them away for a while. Time is no stream, but an illusion dwelling in the heart. The one true magic is to carve the now. Privacy Policy: https://kaikoku.cavemen.jp/privacy.html Terms of Use (EULA): https://kaikoku.cavemen.jp/terms.html

What’s new

Version 1.3.0 · Updated October 26, 2026

• Introducing Tidings: notifications of the heavens — the sun passing into a new sign, full and new moons, the 24 solar terms, solstices and equinoxes — at most one a day. Quiet hours are respected; tidings wait until they end. • Bell tidings: a reminder at your Hour of Sleep (your morning alarm minus your hours of sleep), and a heads-up on a weekday evening if you forgot to set tomorrow's alarm. • Dawn Herald: when you stop an alarm, one notification sums up today's heavens and your appointments. • Choose which tidings to receive in Arcane Settings → Book of Tidings. You can set an alarm or open the dial straight from a notification. • The familiar can now tell you tomorrow's weather. • iPhone Duo: fixed the pocket watch hanging sideways or upward on the inner screen. Open or half-folded, the watch now stays on screen while a chamber opens beside or beneath it, and the back button sits in the upright bar on the right. • Fixed stopwatch text spilling past the dial in some languages, and corrected translations in several languages.

App privacy

The developer, 株式会社Cavemen.jp, reported these privacy practices to Apple.

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Location: Coarse Location
  • Identifiers: Device ID, User ID
  • Usage Data: Product Interaction, Advertising Data, Other Usage Data
  • Diagnostics: Performance Data, Other Diagnostic Data, Crash Data
  • User Content: Other User Content

Used for: Third-Party Advertising, Developer’s Advertising or Marketing, Analytics, App Functionality, Other Purposes

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