MealCircle: A Retention-First Nutrition Coaching SaaS

MealCircle is an own product, not a client engagement: the nutrition-coaching SaaS built and operated by Opexia's founder, Sheharyar Amin. It is the system we point to when someone asks whether we have shipped and run healthcare software end-to-end ourselves.

What it is

A retention-first clinical nutrition SaaS for dietitians and nutrition practices. Coaches lose clients between sessions because nothing keeps the client connected to their care plan between appointments. MealCircle is that layer: meal logging and progress tracking in a mobile app for patients, and a web app for coaches with the client's adherence trend, messaging, and alerts when someone is falling off.

Why retention-first changes the data model

Most nutrition apps model meals. MealCircle models adherence: each log entry is a data point on the relationship between what the coach recommended and what the client actually did. That is what lets the platform score adherence over time and surface drifting clients to the coach before the next session, rather than after a no-show.

Architecture

• Multi-tenant from the first migration: every table carries the practice identifier and PostgreSQL row-level security enforces isolation in the database, not just in application code. Each practice is a separate covered entity, so a cross-tenant leak would be a breach regardless of cause.
• Google Cloud, built to HIPAA requirements: Cloud SQL for PostgreSQL with Cloud KMS encryption at rest, Cloud Audit Logs enabled before the first user, Secret Manager for every credential, TLS everywhere, and a BAA in place with the cloud provider and every service that can see patient data.
• Stripe subscription billing on a per-practice flat rate with usage-based add-ons, with subscription state reconciled from webhooks.
• An EHR integration path designed around FHIR R4 rather than per-vendor connectors, so a practice's EHR can be connected when it exposes FHIR.

What it proves for a client build

The same patterns we use on client platforms were exercised here on a product we operate ourselves: tenant isolation, audit logging, managed infrastructure that keeps day-to-day operations small, and billing built early instead of "later". The technical write-ups are in the MealCircle articles under insights.