Built for people with fatty liver — and no one else.
Most fasting apps are built for weight loss. LivaFast is built for liver health. Every feature, every metric, and every coaching suggestion exists because a hepatologist would approve of it.
Why a dedicated app matters
Fatty liver disease affects 38% of adults globally, yet there isn’t a single mainstream health app designed for it. Generic fasting trackers don’t understand ALT trends. Nutrition apps don’t know what FIB-4 means. Fitness platforms don’t account for the specific metabolic profile of MASLD.
LivaFastwas designed from day one around the biology of fatty liver disease. The fasting protocols are calibrated for hepatic fat mobilization. The lab tracking follows the exact biomarkers your hepatologist checks. The coaching is evidence-informed and specific to NAFLD/MASLD — not generic wellness advice.
This focus means saying no to a lot. No calorie counting. No macro tracking. No social features or gamification. Just the tools that matter for reversing fatty liver, presented calmly and honestly.
Liver Progress Score
Your hepatologist tracks a dozen numbers. You shouldn’t have to. The Liver Progress Score (LPS) is a single composite metric that synthesises your lab values, fasting consistency, and activity patterns into one number between 0 and 100.
LPS isn’t a medical score — it’s a progress indicator. It rises when your ALT trends down, when you maintain consistent fasting windows, and when you hit your movement targets. It falls when these signals reverse. Think of it as a GPS for your liver health journey: not a diagnosis, but a direction.
Every component of the score is transparent. Tap it to see exactly which inputs contributed and how. No black boxes.
Private by design, not by policy
Your health data never leaves your device. LivaFast uses Apple CloudKit Private Database for sync — we literally cannot access your information.
There are no analytics SDKs. No crash reporters that see health data. No third-party services with access to your labs, your fasting windows, or your conversations with LiVA. The app doesn’t even have a login screen — your Apple ID handles authentication silently via CloudKit.
This isn’t a privacy policy promise. It’s an architectural decision. We literally cannot access your data, because the system was designed so we never receive it.
LiVA: on-device AI that stays on-device
LiVA is LivaFast’s AI coaching layer, powered entirely by Apple Foundation Models. It runs on your iPhone or iPad — no cloud, no API calls, no data leaving your device.
LiVA sees your fasting history, lab trends, and activity patterns. It uses that context to offer specific, evidence-informed suggestions: when to fast, what to watch for in your next lab draw, how to adjust your protocol based on your progress.
Because the model runs locally, conversations are instant and private. Your chat history is stored in the same CloudKit Private Database as the rest of your data — encrypted with your Apple ID, invisible to us.