Firebase Analytics & Ads Integration for meta & google

I need a clean, from-scratch Firebase setup for both my iOS and Android apps so I can finally see reliable analytics all the way through signup, booking and payment. The work is entirely technical—no long-term campaign management—just the plumbing and proof that data flows where it should.

Here’s what I’m counting on you to deliver:
• Spin up a new Firebase project, link GA4, and drop the latest Firebase SDKs into the existing iOS and Android codebases.
• Map and fire three key events—sign-up, booking confirmation, and successful payment—with the correct parameters (user ID, value, currency, timestamp).
• Connect Firebase conversions to Meta Ads Manager and Google Ads so the same events show up as trackable conversions in both platforms.
• Run small, temporary test campaigns purely to generate traffic and confirm every event appears in Firebase, Meta, and Google Ads dashboards.
• Provide a short hand-off pack: source code snippets, configuration screenshots, and a screen recording that proves the end-to-end flow works.

The only app functions that matter for this task are Signup/Booking, Payment Processing, and Event Mapping; everything else can stay untouched. Please use current-stable SDK versions and keep the implementation privacy-compliant (ATT prompts, SKAdNetwork where relevant). Once the tests pass and the documentation is in my hands, the job is done.