Zero-Cost User Feedback System for Indie Developers

How to build a free, globally accessible user feedback pipeline using Tally, Cloudflare Workers, and GitHub Issues.

Introduction

User feedback is the lifeblood of product iteration for indie developers. But building a reliable feedback system often presents three significant challenges:

1. Cost Pressure: Professional tools have restrictive free tiers or expensive paid plans
2. Global Coverage: Tools accessible in China often fail overseas and vice versa
3. R&D Disconnect: Feedback data siloed in third-party platforms requires manual syncing

I solved all three with a zero-cost, globally accessible solution that integrates directly with GitHub workflows.

Why This Solution Matters

The Status Quo

The Better Way

My solution combines three free tools that together create a production-ready feedback pipeline:

• Tally: Unlimited submissions, global CDN
• Cloudflare Workers: 100K requests/day free
• GitHub Issues: Free for public repos, native developer workflow

Architecture Overview

App Feedback Button → Tally Form (WebView) → Webhook → Cloudflare Worker → GitHub Issues

Core Components

1. Tally Form: Customizable feedback collection with hidden fields for device metadata
2. Cloudflare Worker: Serverless function that receives webhooks and creates GitHub Issues
3. GitHub Issues: Structured feedback tracking with full developer workflow integration

Design Principles

• No Vendor Lock-In: Only generic tools; easy to migrate
• Async-First: Webhooks don’t block user experience
• Traceable: Each feedback gets a unique ID for tracking
• Privacy-First: Device info is hashed; no PII collected

Implementation

App Integration

const feedbackId = generateUUID()
const params = new URLSearchParams({
  device_id: hashDeviceInfo(),
  os_type: getOS(),
  app_type: 'desktop',
  feedback_id: feedbackId
})
const url = `https://tally.so/r/your-form-id?${params.toString()}`
openWebView(url)

Cloudflare Worker

Lookup Route (/lookup):

addEventListener('fetch', event => {
  const url = new URL(event.request.url)
  const feedbackId = url.searchParams.get('feedback_id')
  const html = `
    <h1>Feedback Received!</h1>
    <p>Your feedback ID: ${feedbackId}</p>
    <a href="https://github.com/repo/issues?q=FeedbackID:${feedbackId}">
      Track your feedback
    </a>
  `
  event.respondWith(new Response(html, { headers: { 'Content-Type': 'text/html' } }))
})

Webhook Route (/webhook):

async function handleWebhook(request) {
  const data = await request.json()
  await fetch(`https://api.github.com/repos/repo/issues`, {
    method: 'POST',
    headers: {
      'Authorization': `token ${GITHUB_TOKEN}`,
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      title: `Feedback: ${data.feedback_id}`,
      body: `Device: ${data.os_type}\nDescription: ${data.description}`
    })
  })
  return new Response('OK', { status: 200 })
}

Key Technical Considerations

Async Race Condition

Problem: Tally webhooks are asynchronous. Page redirects happen faster than GitHub Issue creation.

Solution: Use static GitHub search links instead of real-time queries. The Issue will exist when users click the link.

Hidden Field Persistence

Problem: Tally hidden fields only read URL params on first load.

Solution: Disable refresh in WebView. Use Referer header as fallback.

Webhook Limitations

Problem: Can’t control Tally via webhook responses.

Solution: Use Tally’s built-in redirect feature.

Results

Getting Started

1. Register Tally account and create feedback form
2. Deploy Cloudflare Worker with /lookup and /webhook routes
3. Configure Worker environment variables (GITHUB_TOKEN, GITHUB_REPO)
4. Set Tally webhook and redirect URLs
5. Integrate feedback button in your app

Conclusion

This zero-cost feedback system solves the three biggest challenges indie developers face: cost, global accessibility, and R&D integration. It’s production-ready, requires minimal maintenance, and integrates seamlessly with GitHub workflows.

The system is currently running for DouXia. Give it a try for your next project!