Deep Linking
Deferred deep linking that survives the install
Click a link, install the app, and land on the exact screen — promo code, product, profile, anything. Link Trail bridges the App Store handoff and resolves the deep link on first open.
The mobile linking platform
One link from ad to install to the right in-app screen.
Link Trail is the deep linking and attribution platform for mobile-first teams. Smart-route every click to App Store, Play Store, or web. Survive the install. Land users on the exact screen they came for — with full campaign credit and fraud-clean data.
- Accuracy
- 98.4%
- Latency
- <50ms
- Reach
- iOS + Android
link.trail/promo/summer
200 OKiPhone tap
Safari · iOS 18 · IDFA captured
Smart route
Match: iOS → App Store
App installed
Fingerprint score 0.94 · attributed
/promo/summer
SUMMER50 · campaign: summer_launch
Attributed
summer_launch · instagram
Last touch
Trusted by mobile teams shipping at scale
NorthwindAcme MobileLumenKestrelPineconeHelioVantageLatticeNorthwindAcme MobileLumenKestrelPineconeHelioVantageLattice
The platform
Everything you need to ship, attribute, and grow.
Link Trail bundles deep linking, attribution, fraud protection, and analytics into one platform — so you don't stitch together five vendors to answer "where did this install come from?"
Smart Routing
One link. Every device. The right destination.
Detect iOS, Android, and desktop in real time. Route to App Store, Play Store, mobile web, or a fallback page — all with the same shareable short link.
Attribution
Multi-signal attribution, deterministic where it counts
A waterfall of Google Play Install Referrer, IDFA, GAID, and fingerprint scoring. Configurable first-touch, last-touch, or linear models per link.
Fraud
Block click flooding and device farms automatically
Every install is scored against velocity, device-signal, and SDK-spoofing heuristics. Suspicious installs are flagged before they ever poison your funnel.
Privacy
SKAdNetwork and Privacy Sandbox, first-class
Register for SKAN, push conversion values, ingest postbacks. Stub or run the full Android Attribution Reporting API. Privacy-safe, store-policy-clean.
Analytics
A real-time dashboard your growth team will actually use
Clicks, installs, attributed installs, and fraud signals — broken down by campaign, channel, platform, and link. Auto-refreshing, no waiting on cron jobs.
How it works
From tap to attributed install in four steps.
One link does the work of an ad redirector, app-store router, attribution engine, and deep-link resolver — without losing the user along the way.
- 01
Create a smart link
Define a deep link path, custom payload, and per-platform fallbacks. Generate a short link or QR code in seconds.
POST /v1/links { "campaign": "summer_launch", "channel": "instagram", "iosUrl": "apps.apple.com/...", "androidUrl":"play.google.com/...", "deepLinkPath": "/promo/summer", "customData": { "code": "SUMMER50" } } - 02
Route every click intelligently
Link Trail inspects the User-Agent, captures fingerprint signals, and redirects iOS to App Store, Android to Play, desktop to web — no extra logic on your side.
GET /l/abc123 ↳ iPhone → apps.apple.com ↳ Pixel 8 → play.google.com ↳ Mac → linktrail.dev/promo - 03
Match the install to the click
Our attribution waterfall runs Play Install Referrer, IDFA, GAID, and weighted fingerprinting. You get a match type, a confidence score, and clean campaign credit.
matchType: "fingerprint" score: 0.94 campaign: "summer_launch" channel: "instagram" attributed: true - 04
Land users on the right screen
On first open, the SDK fires onDeferredDeepLink with the path and custom payload. Skip the homepage. Convert users straight into the experience they tapped on.
OpenTrack.shared?.onDeferredDeepLink { router.navigate(to: $0.path) // → /promo/summer · code SUMMER50 }
1.5B+
Links served monthly
Across iOS, Android, and the open web.
98%
Attribution accuracy
Multi-signal deterministic + probabilistic match.
<50ms
Edge redirect latency
Globally cached link resolution.
10k+
Apps integrated
From early-stage indies to public companies.
Customer stories
Mobile teams shipping better numbers with Link Trail.
Retail · E-commerce
Northwind Commerce
iOS + Android
How Northwind moved off IP-only attribution and used deferred deep links to triple promo-link conversion.
- Promo-link install conversion
- 3.2×
- Attributed installs from paid social
- +48%
- Time spent reconciling reports
- −72%
Read the story
Health & Fitness · Consumer subscription
Kestrel Fitness
iOS + Android
Why Kestrel ripped out their MMP and replaced IP-only matching with Link Trail's multi-signal waterfall.
- Lift in attributed installs
- +45%
- Avg. fingerprint confidence
- 0.92
- Migration to production
- <24h
Read the story
Music streaming · Consumer subscription
Lumen Music
iOS + Android
How Lumen cut paid acquisition fraud by 78% — and stopped paying for installs that never opened the app twice.
- Fraudulent installs in paid channels
- −78%
- Annualized spend recovered
- $1.2M
- Bad partners cut
- 12
Read the story
Built for every role on the team
One platform. Four very different jobs to be done.
For Growth marketers
Run campaigns that prove they paid back
- Per-link campaign, channel, and creative tagging
- First-touch, last-touch, and linear attribution models
- Cohort-level install and revenue ROI by channel
For Mobile product teams
Land users where the magic happens
- Deferred deep linking to any screen — even on first install
- Custom payloads (promo codes, referrers, content IDs)
- Re-engagement deep links for already-installed users
For Engineers
Drop-in SDKs, predictable API, no vendor lock-in
- Native iOS (Swift) and Android (Kotlin) SDKs
- Universal Links, App Links, and custom schemes
- Open REST API, webhooks, and CSV/BigQuery export
For Performance & paid
Postback to every ad network in their format
- Meta, Google, TikTok, Apple Search Ads integrations
- SKAdNetwork postback ingestion and conversion values
- Privacy Sandbox Attribution Reporting ready
Developers
Three lines to install. Three lines to deep link.
Drop the SDK in, configure with your API key, and listen for deferred deep links. Link Trail handles the click match, the install attribution, and the in-app routing payload.
- Native iOS & Android
- Swift Package + Kotlin AAR. No bridging, no wrappers.
- REST + Webhooks
- Predictable JSON API. Webhook every attribution event.
- Universal & App Links
- AASA and assetlinks.json served from your domain.
- Privacy-first
- SKAdNetwork, Privacy Sandbox, ATT-respecting flows.
OpenTrack.swiftOpenTrack.kt
v1.0.0
iOS · Swift
import OpenTrack
// 1. Configure once at launch
OpenTrack.configure(
apiKey: "lt_live_…",
options: OpenTrackOptions(baseURL: "https://api.linktrail.dev")
)
// 2. Land users on the right screen
OpenTrack.shared?.onDeferredDeepLink { link in
router.navigate(
to: link.path, // "/promo/summer"
payload: link.customData // ["code": "SUMMER50"]
)
}
// 3. Track the install (auto-attributes the click)
OpenTrack.shared?.trackInstall()Android · Kotlin
import com.linktrail.sdk.OpenTrack
// 1. Configure once in Application.onCreate
OpenTrack.configure(
context, "lt_live_…",
OpenTrackOptions(baseURL = "https://api.linktrail.dev")
)
// 2. Handle deferred deep links
OpenTrack.shared?.onDeferredDeepLink { link ->
router.resolve(link.path, link.customData)
// path: "/promo/summer", customData: { code: "SUMMER50" }
}
// 3. Send the install event
OpenTrack.shared?.trackInstall(force = true)Attribution & fraud
A waterfall designed for the post-IDFA world.
Link Trail starts with the most accurate signal available — the Play Install Referrer or an IDFA / GAID match — and only falls back to probabilistic fingerprinting when nothing else applies. Every install comes with a match type and a confidence score so you know exactly what you're looking at.
1
100%Play Install Referrer
Deterministic · Android
2
100%IDFA match
Deterministic · iOS (ATT)
3
100%GAID match
Deterministic · Android
4
80–90%Fingerprint score
Probabilistic · IP + UA + screen + tz + locale
5
—Organic
No match · unattributed
Fraud score · install #4821
0.06 / 1.00
- Pass
Click flooding
>20 clicks from one IP / hour
- Pass
Device farms
>5 installs from one IP / hour
- Pass
SDK spoofing
Missing or implausible device fields
- Pass
Geo / time anomaly
Click region ≠ install region
Installs scoring ≥ 0.5 are flagged and excluded from billable campaigns by default. Override per-link if you want to manually review.
Integrations
Plays nicely with your existing growth stack.
Send attribution data to the ad networks and analytics tools your team already lives in. No CSVs, no zaps, no human in the loop.
- M
Meta Ads
Install postbacks + deep link ads
- G
Google Ads
Play Install Referrer + UAC
- T
TikTok Ads
Conversion postbacks
- A
Apple Search Ads
AdServices attribution
- A
Amplitude
Event forwarding
- M
Mixpanel
User-level attribution
- S
Segment
Send through 300+ destinations
- B
Braze
Enrich CRM profiles
- I
Iterable
Lifecycle messaging
- B
BigQuery
Raw event export
Pricing
Simple, usage-friendly pricing.
Start in the sandbox for free. Scale to millions of MAU on the same platform — no replatform, no surprise overages.
Free
$0
Sandbox
5K MAU
25K clicks/mo
- Unlimited links
- Deferred deep linking
- Last-touch attribution
- Real-time dashboard
Most popular
Starter
$20
/month
25K MAU
125K clicks/mo
- Everything in Free
- Smart platform routing
- Fraud detection
- First-touch + last-touch models
- Email support
Growth
$79
/month
125K MAU
625K clicks/mo
- Everything in Starter
- Linear & multi-touch attribution
- Ad network postbacks
- Webhooks + BigQuery export
- Priority support
Scale
$249
/month
500K MAU
Unlimited clicks
- Everything in Growth
- Custom short domains
- SSO, RBAC, audit logs
- Dedicated edge + 99.99% SLA
- Solutions engineering
Need more than 500K MAU or a custom contract? Talk to sales.
From the Link Trail blog
Field notes on attribution, deep linking, and growth.
Attribution
The post-IDFA attribution playbook: signals, scoring, and what to ship next
Five years after ATT, the playbook has settled. Here's the waterfall we recommend, the signals worth scoring, and the trap most teams still fall into.
ARAnya Roussel·May 8, 2026
9 min readProduct
Why deferred deep linking still matters in 2026
App Clips, Instant Apps, web-first onboarding — surely we don't still need to bridge the install gap? Yes, you do. Here's the math.
Apr 19, 2026 · 6 min read
Engineering
Building a multi-signal fingerprint scorer that doesn't lie
What goes into a probabilistic match? Walk through the weights, the gotchas, and the test harness we use to keep accuracy honest.
Apr 2, 2026 · 11 min read
Privacy
SKAdNetwork 5: what changed and what to ship this quarter
Re-engagement, coarse conversion values, and the new postback structure. A practical migration guide for teams still on SKAN 4.
Mar 21, 2026 · 8 min read
Ready when you are
Ship the link your growth team has been asking for.
Connect your iOS and Android apps in an afternoon. See attributed installs flow into the dashboard the same day.
60-second integration
# 1. Add the SDK
pod 'LinkTrail', '~> 1.0'
# 2. Configure
OpenTrack.configure(apiKey: "lt_live_…")
# 3. Listen
OpenTrack.shared?.onDeferredDeepLink {
router.navigate(to: $0.path)
}Available for iOS, Android, React Native, and Flutter.