Recently I got interested in this mod (custom PCB) for Casio vintage watches like F91, F94, F84, A158, A159. Basically any Casio watch using 593 module. First impressions Video.
Watch mod can be easily installed: Installation Guide.
Installing the App will give more clear picture of features: Play Store App.
Watch can be ordered from their store page: Store Page (restocking)
Features:
- Time with calendar synchronization via the companion app, and manual clock adjustments.
- Alarm: Customizable with snooze options, and audible chimes.
- Stopwatch: Measures to 1/100th of a second with logging capabilities.
- World Time: Supports multiple time zones with easy access.
- Timer: Up to five programmable preset timers.
- Sunrise/Sunset Tracking: Based on geographical location.
- Fitness and Health Monitoring: Includes a step counter with daily goals, heart rate monitor, ambient temperature sensor, and 30 days of activity data storage.
- Additional Functions: Digital tally counter, mini-games (like Blackjack), gesture controls, and a name tag.
Hardware:
- Processor: Cortex-M4/M0+ and Bluetooth Low Energy (BLE).
- Sensors: Accelerometer with gesture sensing, temperature sensor, heart rate pulsometer.
- Connectivity: Bluetooth for syncing with smartphones.
- Battery Life: Up to 10 months with regular use, extending to 3 years in power-saving modes.
Customization & Additional Features
- Backlight: RGB LED backlight, customizable for color.
- NFC Tag (optional): NTAG213 chip for resin-based F-91W models.
- Firmware Updates: Wireless firmware upgrade options via the app.
- User Personalization: Customizable watch faces, app sequences, and settings for alarms, time zones, and more.
Planned Features:
- Apple health / Google Fit integration.
- Low Battery alert in App.
- Multiple Alarms.
- customizable region support for day of the week.
- Music controls
- Weather
- Watch push notifications.
- Step counter reminders