Slow watchapp

Slow is a minimal, power-efficient 24-hour single-hand watch application for Pebble smartwatches, inspired by Classic Slow Watches. It is engineered with a custom state-machine architecture to maximize battery life by eliminating unnecessary screen redraws and utilizing ultra-low power standby modes.

Metadata & Author/Credits

• Version: v3.2
• Build Date: 2026-09-08
• Developer: A.J (andrwj@gmail.com)
• AppStore: https://apps.repebble.com/9fc80a38cfe14a6ea72f08b7
• Inspiration: Slow Watches Switzerland
  Slow watch for pebble, inspired by slow-watches.com. Permission granted by Slow Watch to use design & the name ‘Slow’

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Button Controls & Triggers

1. Main Watchface Mode

Button / Trigger	Action	Description
UP (Long Press)	Open Settings Menu	Opens the full configuration window (Preferences).
UP (Double Click)	Toggle Seconds Mode	Toggles 3D viewing-angle-aware second hand on/off.
UP (Single Click)	Enter Blank (Sleep) Mode	Enters ultra-low power standby (suspends all timers & sensors).
SELECT (Single Click)	Open Alarm Setting	Opens interactive alarm adjustment screen.
SELECT (Double Click)	Toggle Battery Warning	Toggles visual battery limit warning rings on/off.
SELECT (Long Press)	Cancel All Alarms	Cancels any scheduled alarms.
DOWN (Single Click)	Toggle Date / Day	Shows or hides Day & Date on the dial.
DOWN (Double Click)	Change Face Type	Cycles through 4 different 24-hour dial layouts.
DOWN (Long Press)	Quick Alarm (Pomodoro)	Instantly schedules configured Quick Alarm (1~45 min).
BACK (Single Click)	Exit with Auto-Respawn	Closes app and automatically re-launches via Wakeup API.
BACK (Double Click)	Quit App Completely	Completely exits the application (disables auto-respawn).

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2. Alarm Setting Screen

Button / Trigger	Action	Description
UP (Single / Repeat)	Increase Alarm Time (+)	Increments alarm offset (accelerates when held).
DOWN (Single / Repeat)	Decrease Alarm Time (-)	Decrements alarm offset (accelerates when held).
SELECT (Single Click)	Confirm & Save Alarm	Confirms alarm, schedules wakeup, and returns to watchface.
BACK (Single Click)	Cancel Adjustment	Discards changes and returns to watchface.
Inactivity (60s)	Auto-Timeout	Automatically cancels and returns after 60s of inactivity.

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3. Blank (Sleep) Mode

Button / Trigger	Action	Description
Any Button (UP / DOWN / SELECT / BACK)	Wake Up & Rolling Animation	Plays a smooth hand-winding animation to the current time and restores previous mode.

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4. Alarming & Bluetooth Alert State

Button / Trigger	Action	Description
Any Button Press	Dismiss Alert	Stops vibration and clears the alert.
Watch Flip Gesture	Dismiss Alert	Turning wrist or flipping watch face down dismisses vibration.
60s Timeout	Auto-Off	Alarms automatically stop vibrating after 1 minute.

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Detailed Features

1. 24-Hour Single Hand Dial

• Experience time naturally with a single 24-hour hour hand traversing the full daily cycle.
• 4 Face Types:
  1. Black / Sky
  2. White / Sky
  3. Red / Black
  4. Blue / Black

2. 3D Angle-Aware Dynamic Seconds Mode

• Toggle on Demand (DBL UP CLICK): Enables active 1-second second-hand tracking.
• Wrist-to-Face Spatial Mathematics:
  • Uses Pebble 3-axis accelerometer with integer 3D spatial calculations (isqrt, atan2_lookup).
  • Active Viewing: While looking directly at the watch (Pitch: 15° ~ 75°, Roll: -35° ~ +35°, Tilt <= Selected Angle), the second hand moves smoothly every second.
  • Zero-Power Auto-Standby: When turning wrist away, lowering arm, or resting face-up, the second hand instantly disappears and screen redraws stop completely, saving CPU and display power.
  • Instant Resume: Returning to the viewing angle instantly restores the second hand.
• Configurable Viewing Angle: Choose from 5 angular ranges in Settings (45°, 50°, 55°, 60°, 65°).

3. Blank (Deep Sleep) Mode

• Pressing Single UP Click enters Blank Mode.
• Completely unsubscribes Tick Timer service and Accelerometer data stream.
• Takes advantage of Sharp Memory LCD’s zero-power static display for 100% MCU Deep Sleep.

4. Smart Alarm & Quick Pomodoro

• Interactive Alarm Screen: Adjust alarm time with auto-accelerating hold keys and visible dotted target marker.
• Quick Alarm (LONG DOWN CLICK): Instantly triggers preset countdown timer (1 ~ 45 min).
• Persistent Pebble Wakeup Integration: Alarms wake up the watch even if the app is closed.

5. Auto-Respawn (Keep-Alive)

• Single BACK Click (Temporary Exit & Auto-Respawn):
  • Closes the app and automatically schedules a background Wakeup event to re-launch Slow after the configured delay (Respawn Delay, default 90s).
  • Allows quick checking of notifications or system menus while retaining always-on watchface accessibility.
• Double BACK Click (Complete Exit):
  • Cancels the scheduled wakeup and completely quits the application.
• Settings Menu Integration:
  • Auto-Respawn: Enable or disable the keep-alive auto-launch mechanism (Yes / No).
  • Respawn Delay: Configure the background re-launch interval (15, 30, 60, 90, 120 seconds).

6. Bluetooth Disconnect & Battery Protection

• Bluetooth Loss Alert: Vibrates and displays warning overlay when phone disconnects.
• Battery Limit Ring: Visual warning ring alerts when battery is outside configured limits.
• Flip to Mute: Turn watch upside down to immediately silence disconnect or alarm vibrations.

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Settings Menu (LONG UP CLICK)

Section	Menu Item	Options / Description
Credit	About	App name, version, build date, author info.
General	Quick Alarm	Preset duration: 1, 2, 3, 4, 5, 10, 15, 20, 25, 30, 45 minutes.
General	Second Hand Angle	Viewing tilt angle threshold: 45°, 50°, 55°, 60° (default), 65°.
General	Alert BT Lost	Toggle Bluetooth loss vibration alert (Yes / No).
General	FaceType	Dial style selection (1. Black/Sky ~ 4. Blue/Black).
General	Vibration Strength	Vibration intensity (Disabled, Level 1 ~ Level 5).
General	Update Interval	Normal mode refresh interval (1 ~ 15 minutes).
General	Rolling Animation	Mechanical rewind animation on wake (Yes / No).
Battery	Use Battery Warning	Toggle concentric battery limit warning rings (Yes / No).
Battery	Current	Current battery percentage display.
Battery	High Limit	High battery threshold (60% ~ 80%).
Battery	Low Limit	Low battery threshold (25% ~ 55%).

Supported Platform

• Pebble Time 2 (emery) – 200 × 228 (64 colors, touch-enabled)
• Pebble Core / Gabbro (gabbro) – 144 × 168 (64 colors)