หยุดวิ่งหา 'วันนี้ใครรับลูก' — รายชื่อ pickup ที่ครอบครัวและโรงเรียนเห็นพร้อมกันใน LINE

Source signals

• SIG-20260426-sea-mainland-family-logistics-bkk-school-pickup-handover: "ใครเคยทำยังไงบ้าง / มีใครช่วยรับ-ส่งลูกบ้าง" — Pantip 5+ recurring threads about working parents juggling 3-4 hour gap between school dismissal and parent end-of-work
• SIG-20260426-sea-mainland-family-logistics-shared-pickup-authorization: "pickup authority, an alternate contact, and a late-meeting protocol that everyone follows" — schools refuse unfamiliar caregivers without paper auth
• SIG-20260426-sea-mainland-family-logistics-motorcycle-taxi-school-pickup: "อยากได้แอป / ติดตามบุตรหลานไปโรงเรียน" — parents explicitly asking for tracker app for win-mortor school commute
• SIG-20260426-sea-mainland-family-logistics-grandma-grab-roundtrip: 80-90 baht × 4 trips/day grandma-escort kindergarten run, no multi-stop SKU
• SIG-20260426-sea-mainland-family-logistics-after-school-tutor-pickup-chain: 3-4 leg after-school chain, Bangkok traffic 30-60 min unpredictable

What we ship

**Core features (MVP)**

• Family pickup roster: assign who picks up which day a week ahead; visible in shared LINE chat
• Per-pickup QR authorization: when assignee swaps, the system generates a single-use QR + photo of authorized adult + national ID for the gate teacher
• Fallback protocol: if the assigned pickup hasn't confirmed departure 30 min before dismissal, auto-LINE alert + secondary contact (grandma/nanny) goes on standby
• LINE bot in family chat: "สวัสดี วันพุธลูกเลิก 15:30 ใครรับ?" understands short Thai replies and updates roster
• Live ETA when pickup is on Grab/win-mortor: Grab deeplink + manual "child in car / child home" checks

**Primary user flow**

1. Landing (Thai-first), hero "วันนี้ใครรับลูก" — one parent signs up via LINE Login

2. Invites other adults via LINE deeplink (mom → dad → grandma → nanny)

3. One family = one Roster; school added as optional "view-only" label

4. Week 1 — master schedule; second screen — fallback chain ("if mom busy → grandma → AI-suggested Grab")

5. Day 7 free-trial end: 199 THB/mo Solo-Parent OR 299 THB/mo Family

**What it looks like**

• **Landing**: Thai hero "หยุดส่งข้อความหา 'ใครรับลูกวันนี้'", LINE-chat illustration, "X events/month coordinated" pulse counter, CTA "เริ่มฟรี 7 วัน"
• **Main app screen**: vertical 14-day roster — each day with morning/afternoon slots, colored avatars of assignees, status (✓ confirmed / ⏳ pending / ⚠️ no-one), Today card at bottom with QR
• **Output**: at the school gate, teacher scans QR via LINE camera → bot replies "✅ คุณสมศรี (ยาย) — มีอำนาจรับ น้องเปา วันนี้"; in parallel, mom gets push "สมศรี เพิ่งรับน้องเปา 15:42"

**MVP build plan (12 days)**

• Day 1-3: backend Family + Member + Roster + PickupSlot + Authorization, LINE Login OAuth
• Day 4-6: roster UI (drag-drop weekly view), QR generation + verification endpoint
• Day 7-9: LINE bot intent classifier (Claude parses Thai pickup replies), fallback cron
• Day 10-11: PromptPay recurring via Omise, Thai landing, Pantip "build-in-public" thread
• Day 12: deploy, soft launch in 2 BKK Facebook working-mom groups + Pantip Family forum

Reasoning

The pain is documented across 5 SIGs (bkk-school-pickup-handover, shared-pickup-authorization, motorcycle-taxi-school-pickup, grandma-grab-roundtrip, after-school-tutor-pickup-chain) — recurring Pantip threads, and BKK Nanny / FamBear directly market "pickup authority + alternate contact + late-meeting protocol." User insight is clear: the pain is not transport (Grab + win-mortor + school van already exist) — it's **coordination + authorization**. Nobody ships an app that simultaneously (a) knows today's family roster, (b) gives the school a digital pickup confirmation, (c) lives inside LINE — where Thai families actually communicate.

Stack-fit is ideal: PWA + LINE Login + Bot, no native mobile, no regulated payments (PromptPay via Omise is standard). 12 days is realistic — the Thai pickup-intent bot is 5 intents on Claude; the rest is plain CRUD.

Quick competitive read

• **BKK Nanny / Kiidu / FamBear** — sell full-service nanny with pickup baked in (15-35K THB/mo). Not a SaaS tool. Aimed at affluent niche; our target is middle-class parents without permanent-nanny budget.
• **Schoolbright / BlueSheep** — school ERPs, B2B-focused (school buys) — not B2C, no LINE-native flow, ignore grandma/win-mortor edge.
• **Famly / Cozi (US/EU family planners)** — generic family calendars, no understanding of Thai school specifics (LINE as the only channel, written pickup auth requirement).
• **White space**: Thai LINE-native pickup roster + digital gate authorization. Competitive pressure 8/10 (white space).

Initial pricing hypothesis

199 THB/mo Solo-Parent (1 child, up to 3 adults on roster); 299 THB/mo Family (up to 3 kids, up to 5 adults, priority support). 7-day free trial no card; pay via PromptPay. Anchored to TH emerging-tier consumer WTP (99-299 THB solo, 299-599 family) with 4000+ THB/mo savings story on stress + taxi mistakes.

Distribution hypothesis

1. Pantip "build-in-public" thread in Family / Working-Mom forum (document the 12-day build live)

2. TH Twitter (high engagement) with short Thai videos "ใครรับลูก?" — 30-second use-case clips

3. Facebook groups Bangkok Working Moms (60K+ members), Bangkok International Mums, Phuket Family Network

4. LINE OpenChat Education (Thai moms drown in school deadlines) — soft pitch via bot

5. Influencer pair — Bangkok-based Thai parenting influencers (เลี้ยงลูกแบบมีเหตุผล), product-trial gift