One link for every channel: smart links for TikTok, email, SMS, and QR

Most teams end up maintaining a spreadsheet of links: one for the iOS store, one for Android, a web fallback, a different one for the QR code on the poster. Every campaign multiplies them. It's brittle, and it's where tracking parameters go to get mangled.

The fragmentation problem

A user might meet your campaign on an iPhone in TikTok, on an Android in email, or on a laptop. The destination is the same idea — 'this offer' — but the right next step depends entirely on the device. Hard-coding that into separate links means every channel is a place to make a mistake.

Let the link decide

A smart link inspects the device that opened it and routes accordingly. You configure the destinations once — per link or as a domain default — and ship a single URL everywhere.

{
  "ios": "https://apps.apple.com/app/id000000000",
  "android": "https://play.google.com/store/apps/details?id=com.example.app",
  "fallback": "https://example.com/get-the-app"
}

Resolution order

1. 1App installed and domain verified — the OS opens the app directly to the deep link.
2. 2Mobile without the app — route to the correct store for that platform.
3. 3Desktop or unsupported — show the web fallback (which can still try a custom-scheme open first).

QR is just another channel

A QR code on a poster, receipt, or product is the same smart link rendered as a square. The phone that scans it gets routed by the same logic — no separate 'print link' to keep in sync.

Tag per channel without a link per channel

Append a channel parameter to the one link instead of forking it. You keep a single source of truth for routing while still slicing performance by where the tap came from.

https://yourapp.linktrail.io/l/summer?ch=tiktok
https://yourapp.linktrail.io/l/summer?ch=email
https://yourapp.linktrail.io/l/summer?ch=poster-qr