Biometric Attendance App Development

I want to build a simple yet reliable mobile application that lets my field-workers mark their attendance the moment they snap a photo. The app must run smoothly on both Android and iOS and use face-recognition to validate each selfie automatically... (Budget: ₹600 - ₹1500 INR, Jobs: Android, Computer Vision, Face Recognition, Geolocation, iOS Development, iPhone, Kotlin, Mobile App Development, OpenCV, PHP)