ShelfCast — Weekly Grocery Deal Radar That Builds Your Meal Plan Around What's On Sale
Meal planners spend 20 minutes every Sunday cross-referencing three store apps to figure out what's cheap this week before planning dinners. ShelfCast scrapes weekly flyer data from the top 5 grocery chains, matches deals to a recipe database, and outputs a meal plan optimized for your wallet not your aesthetic. Actually useful. Actually buildable. Actually a business.
Difficulty
beginner
Category
Consumer Apps
Market Demand
Very High
Revenue Score
7/10
Platform
Web App
Vibe Code Friendly
No
Hackathon Score
🏆 8/10
What is it?
The pain is real and Googled 4 million times a month: people want to meal plan around grocery sales, not the other way around. Current solutions are either a generic recipe app that ignores prices or a coupon aggregator that ignores meals. ShelfCast bridges the gap: it pulls weekly flyer data from Flipp API (which aggregates North American grocery flyers), matches sale items to a recipe database (Spoonacular), and outputs a 5-dinner meal plan where every main ingredient is on sale this week. Users get a shoppable list sorted by store. Buildable in a weekend with Flipp's public flyer data and Spoonacular's ingredient-to-recipe matching. Monetize via $5/month subscription — low enough to be an impulse buy for anyone who grocery shops.
Why now?
Grocery prices are at a generational high in mid-2026 and #groceryhaul and #mealprep content on TikTok has never had higher engagement — the timing to launch a deal-first meal planner is exactly right.
- ▸Weekly deal ingestion: Flipp API pulls current grocery flyers from top 5 chains updated every Monday morning.
- ▸Recipe matching: Spoonacular ingredient search finds 3-5 recipes per sale item above a minimum rating threshold.
- ▸5-dinner meal plan: algorithm picks the 5 sale items with the most recipe matches and builds a non-repeating weekly plan.
- ▸Shoppable list: exports a sorted grocery list grouped by store aisle with sale prices and quantities.
Target Audience
Budget-conscious meal planners, families with a grocery budget under $300/week — roughly 40M households in the US who actively seek grocery deals.
Example Use Case
Jamie, a parent of three with a $250/week grocery budget, opens ShelfCast on Sunday morning, sees that chicken thighs are $1.99/lb at Kroger, and gets a 5-dinner meal plan built around that deal with a sorted shopping list — saving an estimated $40 per week.
User Stories
- ▸As a budget-conscious parent, I want to see a 5-dinner meal plan built around this week's sale items at my local grocery store, so that I spend less without sacrificing variety.
- ▸As a meal prepper, I want a shoppable list sorted by store aisle grouped by recipe, so that I can get in and out of the store in one trip.
- ▸As a subscriber, I want a weekly email every Monday morning with my meal plan already generated, so that I never have to open the app manually to get value.
Done When
- ✓Deal ingestion: done when user enters zip code and sees at least 10 sale items from local stores loaded within 5 seconds.
- ✓Meal plan generation: done when user clicks Generate Plan and sees 5 meal cards each showing a recipe image, matched sale item, and store price within 10 seconds.
- ✓Shopping list: done when user clicks Export List and downloads or views a list sorted by store with all ingredients and quantities for all 5 meals.
- ✓Paywall: done when free user attempts to view the full shoppable list and is shown a Stripe checkout for $5/month before the list renders.
Is it worth building?
$5/month x 500 users = $2,500 MRR at month 3. $5/month x 2,000 users = $10,000 MRR at month 6. Math assumes TikTok organic reach of 10k views per video at 2% conversion — ambitious but proven in this category.
Unit Economics
CAC: $5 via TikTok organic (2% conversion on 10k views). LTV: $120 (24 months at $5/month). Payback: 1 month. Gross margin: 88%.
Business Model
SaaS subscription
Monetization Path
Free: current week deals only, no meal plan. $5/month: full 5-dinner meal plan, shoppable list, store selection. $12/month: family plan with pantry tracking.
Revenue Timeline
First dollar: week 2 via Stripe paywall flip. $1k MRR: month 2. $5k MRR: month 5.
Estimated Monthly Cost
Spoonacular API: $30, Flipp API: $0 (public), Supabase: $25, Vercel: $20, Stripe fees: ~$15. Total: ~$90/month at launch.
Profit Potential
Lifestyle business viable at $5k-$15k MRR — consumer subscription with very low churn if the weekly deal refresh feels magical.
Scalability
High — add pantry tracking, store loyalty card integration, and a recipe submission community.
Success Metrics
Week 1: 500 free signups. Week 3: 100 paid conversions. Month 2: 70% weekly active retention.
Launch & Validation Plan
Post a no-auth landing page showing this week's top 10 deals matched to recipes, collect 200 emails, flip to paid after 50 signups confirm interest.
Customer Acquisition Strategy
First customer: post a 30-second TikTok showing the Sunday morning routine replaced by ShelfCast — no script, just the screen recording. Ongoing: TikTok and Instagram Reels targeting #mealprep #grocerybudget, Pinterest SEO for meal planning content, r/frugal and r/mealprep communities.
What's the competition?
Competition Level
Medium
Similar Products
Mealime (recipe-first, ignores sales), Flipp app (deals only, no meal planning), Paprika (recipe manager, no deal integration) — ShelfCast is the only deal-first meal planner.
Competitive Advantage
The only tool that starts with what's on sale this week and builds the meal plan backward — every competitor starts with the recipe and ignores your wallet.
Regulatory Risks
Low regulatory risk. Flipp API terms require attribution. No food safety or medical nutrition claims.
What's the roadmap?
Feature Roadmap
V1 (launch): deal ingestion, meal plan generator, shoppable list, Stripe paywall. V2 (month 2-3): weekly email digest, dietary filter (vegetarian, gluten-free), store preference. V3 (month 4+): pantry tracking, loyalty card integration, family account plan.
Milestone Plan
Phase 1 (Week 1): Flipp integration, recipe matcher, meal plan generator ship. Phase 2 (Week 2): Stripe billing, shoppable list export, Monday cron job. Phase 3 (Month 2): 200 paying users, weekly Resend email, TikTok content series launched.
How do you build it?
Tech Stack
Next.js, Flipp API, Spoonacular API, Supabase, Stripe — build with Lovable for full UI, Cursor for API integration, v0 for meal plan card components.
Suggested Frameworks
Spoonacular API, Flipp API, SWR for client-side fetching
Time to Ship
1 week
Required Skills
Flipp API integration, Spoonacular recipe matching, Next.js, Stripe Checkout.
Resources
Flipp API docs, Spoonacular API docs, Next.js quickstart, Stripe docs.
MVP Scope
app/page.tsx (landing + deal preview), app/plan/page.tsx (weekly meal plan), app/api/deals/route.ts (Flipp API proxy), app/api/plan/route.ts (meal plan generator), lib/flipp.ts (Flipp API client), lib/spoonacular.ts (recipe matcher), components/MealCard.tsx (recipe card UI), components/ShoppingList.tsx (sorted list export), lib/db/schema.ts (Drizzle schema), .env.example.
Core User Journey
Land on app -> see this week's top deals -> generate meal plan -> view shoppable list -> upgrade to paid for full list export.
Architecture Pattern
Cron job Monday 6am -> Flipp API fetches weekly flyers -> sale items stored in Postgres -> user requests plan -> Spoonacular matches sale items to recipes -> meal plan generated and cached -> shopping list rendered -> weekly email sent via Resend.
Data Model
User has one WeeklyPlan. WeeklyPlan has 5 MealSlots. MealSlot links to a Recipe and a DealItem. DealItem stores store name, sale price, and flyer week.
Integration Points
Flipp API for weekly grocery flyer data, Spoonacular API for recipe matching, Supabase for user data and cached plans, Stripe for billing, Resend for weekly meal plan emails.
V1 Scope Boundaries
V1 excludes: pantry tracking, loyalty card integration, custom dietary filters, mobile app, social sharing, family accounts.
Success Definition
A budget-conscious parent the founder has never met finds ShelfCast via a TikTok video, upgrades to paid after seeing their weekly savings, and opens the app every Sunday for 8 consecutive weeks.
Challenges
Consumer subscription churn is the killer — if users forget to open the app one Sunday they churn. The weekly email reminder loop is more important than any feature. Finding first 500 paying users requires TikTok or Instagram Reels content showing the money saved — text-based channels will not reach this audience fast enough.
Avoid These Pitfalls
Do not build pantry tracking in V1 — the weekly deal loop is the only feature that matters for retention. Do not rely on Spoonacular free tier in production — budget $30/month for API calls from day one. Do not skip the Monday morning cron job or the app feels stale and users churn immediately.
Security Requirements
Supabase Auth with magic link, RLS on all WeeklyPlan tables, rate limiting 20 plan generations/day per free user, no PII beyond email stored.
Infrastructure Plan
Vercel for Next.js, Supabase for Postgres and auth with pg_cron for weekly refresh, Sentry for errors — total ~$90/month at launch.
Performance Targets
500 DAU at launch, meal plan API under 3s for full generation, page load under 2s, Spoonacular responses cached in Supabase for 7 days to minimize API cost.
Go-Live Checklist
- ☐Security audit complete.
- ☐Stripe checkout tested end-to-end.
- ☐Sentry live.
- ☐Demo meal plan pre-seeded for first run.
- ☐Custom domain and SSL configured.
- ☐Privacy policy published.
- ☐10 beta meal planners signed off.
- ☐Rollback plan documented.
- ☐TikTok and r/frugal launch posts drafted.
First Run Experience
On first run: a demo weekly plan for zip code 90210 with 5 meals built around pre-seeded Kroger and Safeway deals is pre-loaded. User can immediately browse meal cards and the shopping list. No zip code entry or account required to see the demo plan.
How to build it, step by step
1. Define Drizzle schema for User, WeeklyPlan, MealSlot, DealItem, Recipe in lib/db/schema.ts. 2. Run npx create-next-app with TypeScript and Tailwind, install swr, drizzle-orm, supabase-js. 3. Build Flipp API client in lib/flipp.ts fetching current flyer items for top 5 chains by zip code. 4. Build Spoonacular client in lib/spoonacular.ts with findByIngredients endpoint for recipe matching. 5. Build meal plan generator in app/api/plan/route.ts selecting 5 sale items with highest recipe match count. 6. Build MealCard component showing recipe image, matched sale item, store, and price. 7. Build ShoppingList component sorted by store and aisle with quantities. 8. Add Supabase cron via pg_cron to refresh deal data every Monday at 6am. 9. Wire Stripe Checkout for $5/month and $12/month plans, gate full meal plan behind paywall. 10. Deploy to Vercel, run full journey from zip code entry to shoppable list download without any manual config.
Generated
May 9, 2026
Model
claude-sonnet-4-6
Disclaimer: Ideas on this site are AI-generated and may contain inaccuracies. Revenue estimates, market demand figures, and financial projections are illustrative assumptions only — not financial advice. Do your own research before making any business or investment decisions. Technology availability, pricing, and market conditions change rapidly; always verify details independently.