# Build Product Analytics in Lovable

- Tool: Lovable Prompts
- Last updated: June 2026

## TL;DR

Before pasting anything: PostHog and Mixpanel each offer 1 million events per month free and give you funnels, retention, and session replays out of the box. Build in Lovable only if you have specific owned-data or regulated-industry requirements. If you still want to build, this kit gives you an event ingest endpoint, funnel and retention queries on Postgres, and Recharts dashboards — with the GIN indexes and warehouse export path that keep it viable past 100K events per month.

## Frequently asked questions

### Should I just use PostHog or Mixpanel instead?

Probably yes. PostHog gives you 1 million events per month free and includes funnels, retention curves, session replays, feature flags, and A/B testing — all things you would spend weeks rebuilding here. Mixpanel also offers 1 million events per month free with excellent funnel and retention UI. Both integrate in about an hour. Build in Lovable only if: (a) your event volume is genuinely under 100K per month and you want full data ownership on a Postgres instance you control, (b) you're in a regulated industry (healthcare, finance, government) that cannot send behavioral data to a US third-party SaaS, or (c) analytics IS your product and you're building a niche vertical analytics tool to sell to others. If none of those apply, stop reading this kit and go to posthog.com.

### How do I track events from a non-Lovable app?

The ingest Edge Function is a public HTTPS endpoint that accepts JSON. You can call it from any stack — Next.js, React Native, a Python backend, a mobile app, or even a curl command. Follow-up #1 generates a copy-pasteable JavaScript snippet for browser apps. For server-side tracking (important for events you don't want to trust the client with, like 'payment_succeeded'), call the endpoint from your backend server, not the browser. Never include your server-side admin API key in client-side code.

### Can I do session replay like PostHog does?

Not with this kit. Session replay requires capturing every DOM mutation, mouse movement, and scroll event at very high frequency — typically 10-100 events per second — and reconstructing them as a video-like playback. The data volume alone would overwhelm the Supabase free tier in hours. PostHog's session replay is built on a specialized storage backend. If you need session replay, use PostHog or Hotjar — this is not a category where self-building makes sense.

### What about A/B testing and feature flags?

This kit does not include A/B testing or feature flags. Those are significant features that require a flag evaluation SDK (served fast from an edge, not queried from Postgres), assignment logic, and statistical significance calculations. PostHog's feature flags and A/B testing are free up to 1M events/month and integrate in 10 minutes. If you need feature flags today, use PostHog or LaunchDarkly — do not build them from scratch.

### How do I move my Supabase events to BigQuery?

Follow-up #4 in this kit sets up an hourly scheduled Edge Function that streams events to BigQuery using the BigQuery REST API and prunes Postgres to a 30-day rolling window. You need a Google Cloud project, a BigQuery dataset, and a service account JSON key with BigQuery Data Editor role — all created in the Google Cloud Console before running the follow-up prompt. BigQuery is free for storage up to 10GB and $6.25/TB queried (most analytics dashboards cost pennies per month to run).

### How do I make sure my Postgres doesn't melt on funnel queries?

Three things in order of impact: (1) The three mandatory indexes from the starter migration are non-negotiable — without the GIN index on properties, any jsonb query scans every row. (2) Add the materialized view from follow-up #2 to pre-aggregate first-seen events per user per event type. (3) If you cross 500K events in Postgres, move to the BigQuery export and run heavy funnel queries there. Postgres aggregation on a 1M-row events table with jsonb filtering will be slow regardless of indexes — the right tool at that scale is a columnar warehouse.

### Can RapidDev build a custom analytics platform for my vertical?

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-product-analytics
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