Hoverfly

Hoverfly is 8 tiny AI models you add to a Kotlin Multiplatform app: emoji suggestions, smart replies, language detection (Hinglish too), punctuation, toxicity detection, personal-info hiding (phone, UPI, Aadhaar), emotion detection and doodle recognition. They run fully on the device (Android, iOS, desktop, web) in milliseconds, 2–9 MB each. No server, no API key, nothing leaves the phone. Pure Kotlin, on Maven Central, free up to 10,000 monthly active devices.