StampnGo — Digital Loyalty Card
Digital loyalty stamp card with ultra-touch integration
// Built with
objective-c Core Location Core Data uikit REST API01 Problem
Retailers needed a digital replacement for paper stamp cards that could also leverage location-aware discovery to drive foot traffic. Paper cards were easily lost, hard to track, and offered no analytics.
03 Solution
Built an iOS loyalty app with digital stamp card mechanics, Core Location geofencing for proximity-based store discovery, Core Data for offline stamp and card storage, and ultrasound detection integration for frictionless check-ins at participating retailers.
04 Outcomes
Qualitative
- Replaced paper stamp cards with digital alternative
- Enabled location-aware store discovery via geofencing
- Integrated ultrasound detection for frictionless check-ins
- Provided retailers with digital loyalty analytics
06 Constraints
- Must work offline for stamp collection and card viewing
- Geofencing accuracy required for store proximity detection
- Seamless integration with ultrasound check-in system
- Battery-efficient background location monitoring
