👶 Tia — A Digital Heirloom for Your Baby

The flagship product, named after the founders' daughter Tia. Not a tracker — a private, lifelong archive of a child's earliest years: feeds, sleep, diapers, growth, vaccinations, milestones, photo memories, an "Ask Tia" AI, and shared family circles. Live at tia.manohargupta.com. → Tia - Origin Story · Tia - Positioning

At a glance

406 commits · production with paying tiers · solo-built (with Family Overview on brand/content)
Positioning: digital heirloom · privacy-as-preservation · India-native (IAP schedule, Telegram alerts)
Hosting: Hetzner via Dokploy (Self-Hosting)

Stack

Next.js 15/16 (App Router, output: standalone) · NextAuth v5 (Google OAuth + invite-only magic link) · PostgreSQL + pgvector · Drizzle ORM · LiteLLM → MiniMax · Cloudflare R2 · Razorpay (payments) · Resend (email) · Tailwind v4.

Auth evolved across phases (DB-session tia_session cookie → NextAuth v5 + DB hardening). See Tia - Architecture.

Feature map

Surface	What it does
Home / Quick Log	One-tap feeds/diapers/sleep; baby card (photo, age in y/m/d); AI card; vaccine reminders
Activity	Unified activity log
Growth	Growth charts vs WHO standards for the child's age
Medical	IAP vaccination schedule + reminders; pediatrician contact
Memories	Photo gallery — photo → vision model → auto metadata pipeline (R2 + `/api/img` proxy)
🌟 Milestones	Milestone achievements table + page
Ask Tia (AI)	LiteLLM→MiniMax assistant; parenting logistics, defers medical to pediatrician; new session per chat
Circles	Multi-tenant social — share with family, parents stay in control
Mama's Affiliate	`member_profiles`, recommended products, click tracking
Admin	Health, Errors, Audit, AI Usage observability + billing/subscriptions

Build history (sprints, from session logs)

G1 — Design System (14 UI primitives: Button, Card, Modal, Sheet, Input, Select, EmptyState, ConfirmDialog, WashiTape, Badge, Avatar, Tabs, PageTransition…)
G2 — Memories Pipeline (vision-powered metadata; "photo is mandatory, vision does the heavy lifting")
G5 — Age-Aware UX (useStageCheck, time-of-day fast-log matrix, milestones)
G6 — Mama's Affiliate Page (member_profiles, recommended_products, product_clicks)
Circles (multi-tenant social — "the architectural event", split across 2 sprints)
Hardening H1–H2 (auth foundation/password hash; non-superuser tia_app role + RLS + app.current_family_id session context)
PWA shell (installable app) · Marketing homepage + /about Letter

Business model

Free (1 baby, 1 GiB, 2 members) → Pro (2nd baby, more storage, 50 GB premium cap). Billing in ₹ via Razorpay; subscriptions, dunning, churn alerts, webhook health. families.tier + isPaidFamily() (Decision Log#TD-002).

Knowledge base

Tia - Origin Story · Tia - Positioning · Tia - Brand & Copy · Tia - Architecture · Tia - Decisions · Tia - Roadmap · Tia - Open Questions · Quota Feature

MOC - Startup · Family Overview · Decision Log · Self-Hosting · Profile

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