StreakMap — GitHub Contribution Heatmap for Every Habit That Matters to You
GitHub's green square grid is the most motivating UI pattern in software — and it exists nowhere else in your life. StreakMap gives you a GitHub-style contribution heatmap for any habit: workouts, writing sessions, meditation, cold showers, whatever keeps you moving.
Difficulty
beginner
Category
Productivity
Market Demand
High
Revenue Score
6/10
Platform
Web App
Vibe Code Friendly
⚡ YesHackathon Score
🏆 8/10
What is it?
Habit tracking apps are either over-engineered productivity systems or underpowered streak counters. The GitHub contribution graph works because it makes an entire year of consistency visible in one glance — shame and pride at the same time. StreakMap is a dead-simple web app where you create a habit, get a private heatmap URL you can embed in your Notion page or share on Twitter, and check in with one tap from any device. No AI, no gamification, no notifications unless you want them. The shareable public heatmap URL is the viral loop — every developer sharing their writing or workout grid drives organic signups. Buildable in under a week because the heatmap grid is a solved React component and the data model could not be simpler.
Why now?
The May 2026 vibe-coding wave has developers building and shipping in public more than ever, and public accountability tooling that plugs into the Twitter sharing culture has never had a higher-intent audience than right now.
- ▸One-tap check-in from any device with optional intensity level (1-5) for depth tracking.
- ▸GitHub-style full-year heatmap grid using react-activity-calendar with your custom habit color theme.
- ▸Shareable public URL with og:image generation showing your current streak for Twitter cards.
- ▸Embeddable iframe widget for personal sites and Notion pages.
Target Audience
Developers and indie hackers who already use GitHub and want that same visual accountability for personal habits, roughly 5M active GitHub users in the maker community.
Example Use Case
A freelance developer starts a daily writing habit and embeds their StreakMap heatmap in their personal site. After 90 days of greens, they tweet it. Thirty developers sign up from that one tweet because they want the same public accountability.
User Stories
- ▸As a developer doing daily writing, I want a public heatmap URL I can tweet after 30 days, so that public accountability keeps me consistent.
- ▸As a habit tracker user, I want to check in with one tap from my phone, so that the friction of logging does not break my streak.
- ▸As a personal site owner, I want an embeddable heatmap widget, so that my site shows my consistency to visitors without any manual updates.
Done When
- ✓Check-in: done when user taps the check-in button and a new colored square appears on their heatmap within 2 seconds.
- ✓Public page: done when the habit URL loads for a logged-out visitor and shows the full heatmap with no auth wall.
- ✓og:image: done when the heatmap URL pasted into Twitter shows a card with the colored grid visible in the preview.
- ✓Paywall: done when user tries to create a second habit and Stripe checkout appears before the habit is saved.
Is it worth building?
$4/month x 500 paying users = $2,000 MRR at month 6. Math assumes 1% conversion from 50,000 developer and indie hacker community impressions via Twitter sharing virality.
Unit Economics
CAC: $1 via organic Twitter sharing. LTV: $48 (12 months at $4/month). Payback: under 1 month. Gross margin: 98%.
Business Model
Freemium, $4/month for unlimited habits and private heatmaps
Monetization Path
Free: 1 public habit heatmap. Paid: unlimited habits, private heatmaps, embeddable widgets, CSV export.
Revenue Timeline
First dollar: week 2 via beta paid conversion. $1k MRR: month 5. $5k MRR: month 18 if virality hits.
Estimated Monthly Cost
Vercel: $0 hobby tier, Supabase: $0 free tier, Stripe fees: ~$8, og:image generation via Vercel OG: $0. Total: ~$8/month at launch.
Profit Potential
Profitable side project at $2k-$4k MRR, not a venture business but a clean lifestyle product.
Scalability
Add Zapier webhook so any check-in can trigger from Habitica, Garmin, or Apple Health automatically.
Success Metrics
1,000 signups in month 1. 100 paid by month 2. Average habit age over 30 days for retained users.
Launch & Validation Plan
Build a static mockup of the heatmap page, post it in r/IndieHackers and on Twitter asking if people would use it. Target 100 upvotes or retweets before writing code.
Customer Acquisition Strategy
First customer: post your own real StreakMap heatmap on Twitter and r/IndieHackers after 14 days of personal use. Then: viral sharing loop from embeddable widgets, ProductHunt launch, SEO targeting habit tracker and streak tracker keywords.
What's the competition?
Competition Level
Medium
Similar Products
Habitica is gamified and complex, Streaks app is iOS-only with no public sharing, Beeminder uses financial stakes not visual grids — none offer GitHub-style shareable embeddable heatmaps.
Competitive Advantage
Habitica is gamified RPG overkill. Streaks app is iOS-only. Notion habit trackers have no public sharing. StreakMap is the only tool with a GitHub-style shareable heatmap built specifically for the developer audience.
Regulatory Risks
Low regulatory risk. No sensitive data. GDPR: public heatmap pages must be opt-in. Account deletion removes all check-in history.
What's the roadmap?
Feature Roadmap
V1 (launch): heatmap grid, one-tap check-in, public shareable URL, og:image. V2 (month 2-3): embeddable iframe widget, intensity levels, color themes. V3 (month 4+): Zapier webhook, Apple Health sync, multi-habit comparison view.
Milestone Plan
Phase 1 (Week 1): schema, check-in API, heatmap grid rendering correctly. Phase 2 (Week 2): public page, og:image, Stripe billing live. Phase 3 (Month 2): 100 paid users, embeddable widget shipped.
How do you build it?
Tech Stack
Next.js, Supabase, Stripe — build entirely with Lovable, v0 for heatmap component.
Suggested Frameworks
react-activity-calendar (heatmap component), Next.js App Router, Supabase Realtime
Time to Ship
1 week
Required Skills
Next.js, Supabase, basic charting with react-activity-calendar.
Resources
react-activity-calendar npm docs, Supabase quickstart, Next.js App Router docs.
MVP Scope
app/page.tsx (habits dashboard), app/[username]/[habit]/page.tsx (public heatmap page), app/api/checkin/route.ts (check-in endpoint), app/api/habits/route.ts (habit CRUD), lib/db/schema.ts (users, habits, checkins tables), components/HeatmapGrid.tsx (react-activity-calendar wrapper), components/CheckinButton.tsx (one-tap mobile-friendly button), lib/og.ts (og:image generator), .env.example.
Core User Journey
Create habit -> check in daily -> share public heatmap URL on Twitter -> other developers sign up from the tweet -> upgrade to add a second habit.
Architecture Pattern
User taps check-in -> POST to Supabase -> heatmap page re-renders with new square colored -> og:image regenerates -> shareable URL reflects new state instantly.
Data Model
User has many Habits. Habit has many Checkins. Checkin has date and intensity (1-5). Habit has one public slug and one color theme.
Integration Points
Supabase for database and auth, Vercel OG for dynamic og:image generation, Stripe for billing, Resend for optional daily reminder emails.
V1 Scope Boundaries
V1 excludes: Apple Health sync, Zapier webhooks, team habits, mobile app, reminders, social feed.
Success Definition
A stranger finds the product via someone else's shared heatmap tweet, signs up, creates a habit, and shares their own heatmap within the first week.
Challenges
Retention past 30 days is the hardest problem — most habit apps see 80% churn by day 30, so the shareable public URL accountability loop is the retention mechanic, not product features.
Avoid These Pitfalls
Do not add notifications, streaks counters, or rewards in V1 — they distract from the visual simplicity that makes the product sticky. Do not gate the public shareable URL behind the paid tier — it is the entire viral acquisition engine. Finding first 100 signups requires you to share your own real heatmap publicly; no one converts from a landing page alone.
Security Requirements
Supabase Auth with Google OAuth. RLS on habits and checkins tables. Public heatmap pages are read-only with no auth. Rate limit: 10 check-ins/hour per user. GDPR: account deletion removes all data.
Infrastructure Plan
Vercel for Next.js and og:image generation, Supabase for Postgres and auth, GitHub Actions for CI/CD, Sentry for errors, single prod environment on Vercel.
Performance Targets
1,000 DAU at peak, ~5,000 heatmap page views/day. Page load under 1.5s. Check-in API under 300ms. Public pages statically cached at edge via Vercel CDN.
Go-Live Checklist
- ☐Security audit complete.
- ☐Payment flow tested end-to-end.
- ☐Sentry error tracking live.
- ☐Monitoring dashboard configured.
- ☐Custom domain set up with SSL.
- ☐Privacy policy and terms published.
- ☐10 beta users signed off.
- ☐Rollback plan documented.
- ☐Launch tweet and ProductHunt post drafted.
First Run Experience
On first run: a demo habit called Daily Writing with 47 days of pre-seeded check-ins is visible as a heatmap. User can immediately click the public URL and see it load without logging in. No manual config required: demo data seeded on first page load, Google OAuth fires on first check-in attempt.
How to build it, step by step
1. Define Supabase schema for users, habits, and checkins tables with unique slug per habit. 2. Scaffold Next.js app with Supabase Auth using Google OAuth via Lovable. 3. Build habit creation form and habits dashboard in app/page.tsx. 4. Install react-activity-calendar and build HeatmapGrid.tsx component with color theme prop. 5. Build public heatmap page at app/[username]/[habit]/page.tsx fetching checkins server-side. 6. Implement Vercel OG dynamic og:image at app/[username]/[habit]/opengraph-image.tsx showing heatmap snapshot. 7. Build one-tap CheckinButton.tsx that posts to app/api/checkin/route.ts. 8. Add Stripe billing with paywall on second habit creation. 9. Deploy to Vercel and verify og:image generates correctly by pasting heatmap URL into Twitter card validator. 10. Verify: create a habit, check in 3 days, view public heatmap URL, confirm og:image shows colored squares, add second habit and hit Stripe paywall.
Generated
May 2, 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.