ลูกห่างไกล หัวใจไม่ห่าง — diary ลูกร่วมกับคุณยาย ดูแลพัฒนาการ วัคซีน เงินที่ส่ง ในที่เดียว

Source signals

• SIG-20260426-sea-mainland-family-logistics-skip-generation-upcountry: "ตอนนี้เรากำลังจะคลอดในอีกไม่กี่วัน โดยมีแม่สามีมาช่วยดูแลช่วง 3 เดือน แต่หลังสามเดือนแม่จะเอากลับไปเลี้ยงต่างจังหวัด" — RECURRING + UNDP report
• SIG-20260426-sea-mainland-family-logistics-songkran-custody-handoff (overlap): holiday handoff coordination across distance
• SIG-20260426-sea-mainland-family-logistics-special-needs-paperwork (overlap): therapy/health record consolidation challenge

What we ship

**Core features (MVP)**

• Shared baby-diary: photo timeline (grandma snaps via her LINE, bot auto-forwards to diary), text + voice milestones (first word, first steps), AI auto-summarizes into a weekly digest for parents
• Vaccine + health tracker: Thai MOPH vaccine schedule pre-seeded (BCG → 12 hep B → 1m hep B etc.), grandma marks done, system computes "next due"; parents get alerts "child needs DPT-2 next week"
• Remittance ledger: every PromptPay transfer by parents logged (manual or LINE-bot detect "ส่งแล้ว 5,000"), grandma attaches receipt photos for spend — both sides see a clean ledger, reducing UNDP-documented "regular remittance flows can increase conflict"
• Video-call planner: respects grandma's schedule (early-morning farm work, evening cooking) + child's sleep window — proposes 2-3 windows/day, push to both phones
• Emergency mode: "child sick — should mom come?" — Claude prompt with context on health, weather, recent visits

**Primary user flow**

1. Thai landing, hero "ลูกห่างไกล หัวใจไม่ห่าง" — mom signs up via LINE Login

2. Invites grandma via LINE deeplink — grandma's phone opens large-text PWA + LINE bot for voice notes

3. Setup: child (name, age), vaccines already done (mom recalls or grandma dictates), regular expenses (formula 1500 THB/mo, diapers 800)

4. Daily flow: grandma sends photo to LINE → auto-added to diary; weekly mom gets digest

5. Pricing trigger after 14 days: 199 THB/mo (1 child); 299 THB/mo (2-3 kids OR an additional grandparent / aunt)

**What it looks like**

• **Landing**: hero "ปีแรกของลูกผ่านแล้ว เราจำได้แค่ภาพในวีดีโอคอล" (the first year passed, we only remember it through video calls) + stat "1.5M Thai families live apart from their kids"; CTA "เริ่มฟรี 14 วัน"
• **Main screen (mom)**: 3 widgets — Today's photo, Next vaccine due, This month remittance balance; calendar timeline with milestones
• **Main screen (grandma, large text)**: "📷 ส่งรูปวันนี้ → กดที่นี่", "💉 หมอนัด 12 พฤษภา หรือยัง?", "💰 บันทึกค่าใช้จ่าย 800 บาท ค่าผ้าอ้อม"
• **Output**: Sunday evening — mom's digest "📅 This week little Pao: 4 walking steps, 12 photos, 3 new words 'papa, yaay, fish' / 💰 spent 1,420 THB / 💉 DPT-2 done — good!"

**MVP build plan (12 days)**

• Day 1-2: backend User+Family+Child+Caregiver+Milestone+Vaccine+Remittance; LINE Login
• Day 3-5: TH MOPH vaccine schedule seed; LINE bot for grandma (auto-extract photo / voice / receipt from her LINE)
• Day 6-8: weekly digest generator (Claude summarize), video-call planner, large-text grandma UI
• Day 9-10: PromptPay subscription, Thai landing, emergency-mode AI prompt
• Day 11-12: deploy, soft launch in TH Bangkok-Isaan Facebook groups + Pantip skip-generation forum

Reasoning

Skip-generation childcare is a mass Thai phenomenon (UNDP 2022 calls it a "structural arrangement"); 5+ Pantip threads (SIG-skip-generation-upcountry) confirm. The coordination pain is the documented gap: "remittance flows + grandparent care + vaccine schedule + milestone tracking" lives across LINE messages, with no purpose-built tool. Existing baby trackers (BabyTracker, Glow Baby) are solo-parent, not distributed.

Stack-fit is strong: PWA with large-text mode + LINE bot for grandma (grandma won't install an app — she lives in LINE 8 hours a day). MOPH vaccine schedule is a public dataset that can be pre-seeded. Tax-aware: we do NOT move money (ledger only) — D-005 will not trigger.

WTP is strong: emotional pain (parent missing childhood) + practical pain (vaccine misses, remittance disputes). 199 THB/mo is <0.5% of the monthly remittance.

Quick competitive read

• **BabyTracker / Glow Baby / Hatch Baby** — solo-parent, not distributed, no tax context.
• **Cozi / Famly / OurHome** — generic family planners, no skip-generation pattern.
• **WeChat / LINE existing** — family workaround, no structured ledger or vaccine schedule.
• **TH MOPH apps (Mor-prom, ระบบหมอพร้อม)** — government vaccine app, not for distributed parenting, terrible grandma UX.
• **White space**: skip-gen-aware family-OS for distributed Thai parenting. Competitive pressure 9/10.

Initial pricing hypothesis

199 THB/mo Solo (1 child, mom + grandma); 299 THB/mo Family (2-3 kids OR 4+ participants: mom/dad/grandparents both sides/aunt). 14-day free. Anchor: 0.5% of monthly remittance (5K-15K THB) — minimal friction for emotional category. Annual plan 20% off — 1900 THB/yr — locks in committed users.

Distribution hypothesis

1. Pantip skip-gen threads — "build-in-public" focused on first-time-mom milestone anxiety

2. Facebook "แม่อีสานในกรุงเทพฯ" (Bangkok-based Isaan moms) — soft launch

3. TH Twitter — short Thai reels "50 วันที่หายไปจากชีวิตลูก" (50 days lost from child's life)

4. LINE OpenChat for distance parents (existing communities)

5. PR in The Standard / The Matter (Thai longform on "split families post-COVID")