Case Study: FitTrack Boosted Referral Installs 34% with Deferred Deep Links

FitTrack, a health and fitness app with 120K monthly active users, replaced a patchwork of referral links and spreadsheet UTM tracking with HighGrow smart links and deferred deep linking.

Challenge

Referral invites broke after install — users landed on the home screen instead of the friend’s challenge or promo screen. Marketing could not attribute which influencer or gym partnership drove installs.

Solution

1. Referral smart links with unique codes embedded in deep link query params 2. HighGrow SDK deferred deep linking to restore invite context post-install 3. ASO keyword tracking for terms like "workout tracker" and "fitness challenge app" across US and UK storefronts

Implementation timeline

• Week 1: SDK integration (Flutter iOS + Android) • Week 2: Referral link rollout to top 50 gym partners • Week 3: ASO keyword baseline + competitor gap vs two leading fitness apps • Week 4: Automated rank-drop alerts on 12 priority terms

Results after 60 days (July 2026)

• **34% lift** in referral-driven install conversion vs legacy link flow • **22% of new installs** attributed to organic App Store search (up from 15%) • **Weekly keyword sync** replaced manual App Store Connect rank checks

Stack replaced

• Generic short links + manual UTM spreadsheets • Separate keyword rank checker subscription

Key takeaway

Deferred deep linking is the highest-ROI fix for referral programs. Users who install from a friend’s invite must land on the social context immediately — not a generic onboarding screen.

Explore FitTrack’s approach on our Customers page or start with HighGrow deep linking free.