Recover the conversions iOS and ad blockers hide.
Your conversions probably aren't down — your tracking is blind. iOS, Safari, ad blockers and consent banners silently drop 10–30% of conversions before your pixel or GA4 ever sees them, so you under-report results and mis-spend budget. Signal Sparrow recovers that lost data with first-party, server-side tracking from your own domain.
Four things are quietly deleting your data.
If your dashboards feel 'off' — GA4 shows fewer conversions than Stripe, or Meta and Google disagree by a wide margin — it's usually not one bug. It's four privacy mechanisms working at once, each removing a slice of your client-side data before it's ever recorded.
The common thread: they all target third-party, browser-side tracking. First-party, server-side tracking sidesteps all four because the data is served from your own domain and recorded on your server.
Blind spots don't just under-count — they misdirect spend.
Missing conversions aren't a reporting inconvenience. Every dropped event distorts the decisions you and the ad algorithms make next.
Under-reported results
When 10–30% of conversions never fire, campaigns look worse than they are — and you cut winners that are quietly profitable.
Mis-optimized ad spend
The platform learns from a shrinking, biased sample (blockers skew toward certain users), so it optimizes toward the wrong audiences and CPA drifts up.
Inflated, unreliable CAC
Fewer counted conversions means overstated CAC and payback. You can't trust unit economics built on data with holes in it.
Move tracking to your domain and your server.
Serve from your own domain
Point a subdomain at Signal Sparrow with one CNAME. Tracking now loads first-party — invisible to blockers that filter third-party tracker domains.
Capture server-side
Events are recorded on the server, not in the browser, so iOS ITP cookie caps and blockers can't reach in and drop them.
Recover and forward
Reconnected conversions flow into attribution and back out to your ad platforms via server-side CAPI — the signal the algorithms were missing.
The same month, measured two ways.
First-party server-side tracking doesn't invent conversions — it recovers the real ones your pixel dropped. Here's a typical month before and after: the conversions blockers hid come back, long trial-to-paid windows resolve, and iOS traffic is measured again.
Fixing blocked tracking the compliant way.
Recovering blocked conversions doesn't mean fighting user privacy — it means measuring your own first-party data correctly. Signal Sparrow doesn't do cross-site tracking. You remain the data controller, consent state is respected, PII is hashed before it's forwarded, and data can be stored with EU residency under a GDPR-ready DPA.
Your domain, no cross-site tracking
Honors your consent framework
SHA-256 before anything is forwarded
EU residency and DPA available
Privacy Safeguards
GDPR-ready processing on your own subdomain.
Recovered data you can actually trust.
More conversions are only better if they're real. Every recovered event is reconciled to Stripe — attributed plus direct/unknown equals your net MRR for the period, to the cent — and anything we can't match is shown honestly as Direct/Unknown. You close the data gap without inflating your numbers. Watch it stay closed in pipeline health.
Close the gap GA4 can't.
Illustrative figures based on typical recovery when first-party server-side tracking replaces pixel-only tracking.
Fix blocked tracking in 30 minutes.
Add the first-party snippet, point a subdomain at Signal Sparrow with one CNAME, and connect Stripe over OAuth — no data team, no manual API keys, no sales call. You'll see recovered conversions, reconciled to Stripe, within half an hour.
Questions, answered.
Everything teams ask before switching their attribution to Stripe truth. Still curious? Talk to us.
Four privacy mechanisms drop client-side data: iOS App Tracking Transparency, Safari and Firefox ITP (which cap JavaScript cookies to as little as 1–7 days), ad and content blockers that filter tracker domains, and consent banners that gate tags. Together they can hide 10–30% of conversions.
Because tracking is served from your own subdomain and events are recorded server-side, blockers that filter known third-party tracker domains don't match it, and browser cookie caps don't apply. The conversions that pixels lose are captured on the server instead.
Most sites lose an estimated 10–30% of conversions to the combination of iOS, ITP, blockers and consent gating. For trial-led SaaS the gap is often worse, because the paying conversion happens days later — after the pixel cookie has already expired.
Yes. This is first-party measurement, not cross-site tracking. You remain the data controller, consent state is respected, PII is SHA-256 hashed before forwarding, and data can be stored with EU residency under a GDPR-ready DPA.
Yes. Because events aren't bound to short-lived browser cookies, a click on Safari and a conversion weeks later still resolve to the same customer — so long trial-to-paid windows are attributed correctly instead of lost.
It closes the gap at the source by capturing first-party, server-side events that GA4's client-side collection misses, and can stream those recovered events into GA4 — so your analytics reflect what actually happened, not just what the browser allowed.
Ready to see which ads actually pay?
Start free, connect Stripe in 30 minutes, and get attribution that reconciles to the cent.
- Free to start — no credit card
- Live data in 30 minutes
