# Lovable Prompts for Building Polls and Surveys

- Tool: Lovable Prompts
- Last updated: June 2026

## TL;DR

This prompt kit builds a Typeform-style poll and survey tool where creators define questions (multiple choice, scale, short text), share a public link, and view live aggregate results. Anonymous respondents submit without signing up. The entire build runs in under 60 credits — it fits Lovable Free. The single gotcha is RLS: the responses table must have anonymous INSERT but zero SELECT for anon, or anyone can read how your users voted.

## Frequently asked questions

### Can respondents submit without signing up?

Yes. The default configuration allows anonymous submission. Respondents are identified by a fingerprint (their user ID if signed in, or a localStorage UUID for anonymous users) for deduplication, but they never need to create an account. If you want to require sign-in (for higher-confidence deduplication or compliance reasons), set surveys.require_auth=true on a per-survey basis — the respond page will then gate the form behind a Supabase Auth session.

### Why are my survey responses visible to anyone who finds the API URL?

This is a misconfigured RLS policy on the responses table. When Lovable scaffolds anonymous INSERT access, it sometimes grants SELECT to anon at the same time. Anyone who knows your Supabase project URL can then call /rest/v1/responses and read all responses — including the text answers. The fix is to drop any SELECT policy for anon and replace it with an owner-only SELECT that requires the requesting user to own the survey. Run the anonymous-insert RLS audit follow-up prompt and test in an incognito browser before any public launch.

### How do I prevent the same person from voting twice?

The submit-response edge function checks for an existing response with the same (survey_id, respondent_fingerprint) pair when allow_multiple_submissions=false. For signed-in users the fingerprint is auth.uid() — essentially impossible to spoof. For anonymous users the fingerprint is a localStorage UUID combined with an IP hash — clearing cookies or using a new IP defeats it. For high-stakes polls (votes, NPS surveys with real consequences), set surveys.require_auth=true so only authenticated users can submit, making the deduplication cryptographically strong.

### Can I do branching or conditional logic (skip question 5 if question 2 was 'No')?

Yes, but expect to use 50+ credits for this follow-up. The implementation adds a depends_on jsonb column to questions (format: { question_id, operator, value }) and a skip-condition evaluator in QuestionRenderer that checks the current response state and skips questions whose conditions are not met. Lovable can scaffold the basic case, but complex branching trees (multiple conditions, loop-back logic) are where the agent tends to struggle and may need hand-finishing in Dev Mode.

### How do real-time results work for live audience polls?

Enable Supabase Realtime on the responses table (Cloud → Database → Realtime → toggle ON for responses). In SurveyResults.tsx, subscribe to INSERT events filtered by survey_id. When a new response arrives, refetch the aggregations and update the charts. This creates a live-updating results page suitable for conference polls, webinar Q&As, or classroom quizzes. The subscription respects RLS — only the survey owner receives the real-time events.

### Should I just use Tally instead?

For most use cases, yes. Tally is free, unlimited, and ships a beautiful survey in 2 minutes — Lovable cannot match that speed for a standalone survey tool. Build this in Lovable when: (1) you want surveys embedded inside an existing Lovable app with seamless authentication, (2) you need responses stored in your own Postgres for compliance reasons (HIPAA, GDPR data residency), or (3) the survey engine is the product itself (you are building a Typeform alternative). For a standalone NPS survey or onboarding quiz, just use Tally.

### How big a survey can I run before Supabase free tier breaks?

Very large. Supabase Free tier includes 500MB of database storage. A response row is roughly 200 bytes; an answer row with a text value is roughly 500 bytes. With 10 questions per survey, one response ≈ 5KB. At that rate, 500MB holds approximately 100,000 responses. For most indie and small-business use cases, you will never hit this limit on a single survey. If you expect hundreds of thousands of responses (viral poll, company-wide survey), upgrade to Supabase Pro at $25/mo for 8GB storage and point-in-time backups.

### If your survey tool needs branching logic, compliance exports, or CRM integration, what does RapidDev offer?

If your build outgrows this prompt kit and you need custom architecture, RapidDev builds production-grade Lovable apps at $13K-$25K — book a free 30-minute consultation at rapidevelopers.com.

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Source: https://www.rapidevelopers.com/lovable-prompts/lovable-prompts-for-building-polls-and-surveys
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