Koshika

Koshika (कोशिका - Sanskrit for "cell") is an offline-first Android app that puts health intelligence directly in your hands, no cloud, no API keys, no data leaving your device.

The problem: 200+ million Indians get blood tests every year. They receive

• PDF reports full of cryptic abbreviations (SGPT, HbA1c, TSH) that they can't

• interpret. Current apps either require cloud uploads of sensitive health data

• or don't understand Indian lab formats at all.

What Koshika does:

• Parses lab report PDFs from Thyrocare, Dr. Lal PathLabs, SRL, Metropolis and more.

• using regex + a 92-biomarker dictionary with Indian lab name aliases

• Extracts values, flags out-of-range results, and maps to LOINC codes

• Visualizes biomarker trends over time with reference range bands

• Runs an on-device LLM (Gemma via LiteRT) for AI-powered health Q&A

• grounded in YOUR actual lab data via on-device RAG

• Exports FHIR R4 bundles compliant with India's ABDM health data standards

Technical depth:

• ~25MB base APK, PDF parsing + charts work with zero downloads

• AI features as optional module (~400MB-3GB model download)

• EmbeddingGemma 308M for on-device semantic search

• ObjectBox HNSW for vector similarity on mobile

Everything works in airplane mode

Built solo with Flutter. Every inference runs locally. Your health data lives in your cell, not the cloud.