Line App, now Trybeem — Scaling a Fintech App from Early Traction to 28,000 New Paid Subscribers per Month

Category: Fintech App

Market: USA

Business Model: Subscription-based micro-finance app

Plan Pricing: Starting at approximately $2/month

Engagement: 2.5 years

Role: Owned performance marketing across Meta Ads, Google App

Campaigns, affiliate marketing, attribution setup, Appsflyer, CRM/lifecycle, SEO setup, and growth planning

Overview

When I started working on Line App, now Trybeem, the business had almost no meaningful paid acquisition engine in place.

The app had minimal install volume, almost no paid subscriber momentum, very high acquisition costs, weak tracking, and no reliable attribution framework. The task was not just to run ads, but to build a scalable subscriber acquisition system from the ground up.

Over the course of the engagement, I helped scale the app from 2 new paid subscribers per month to 28,000 new paid subscribers per month, while also growing installs to 200,000+ per month, reducing CAC dramatically, and expanding budget in a controlled way.

Business Challenge

The core challenge was scaling subscriptions for a fintech app in a market where trust, efficiency, and attribution accuracy matter heavily.

At the start:

• New paid subscribers were around 2 per month
  
  
  

• Installs were around 10 per month
  
  
  

• CAC was over $150
  
  
  

• Budget was approximately $800/month
  
  
  

• LTV was around $20
  
  
  

The business had scaling ambitions, but there was no strong acquisition system, no mobile attribution layer, no lifecycle marketing setup, and no real clarity on which traffic sources were driving quality users.

Objective

The growth mandate was to:

• increase paid subscribers
  
  
  

• reduce CAC
  
  
  

• scale installs profitably
  
  
  

• improve install-to-paid conversion
  
  
  

• set up attribution and analytics properly
  
  
  

• build lifecycle automation
  
  
  

• expand acquisition through Google, Meta, affiliates, and programmatic
  
  
  

• create a more reliable framework for long-term app growth
  
  
  

What I Found

The main issue was that the app was trying to grow without the infrastructure needed to support performance marketing.

Tracking was weak, and there was no proper attribution setup in place. Campaigns were being optimized for clicks rather than installs or paid subscription events, which meant acquisition quality was poor from the start.

There was no Appsflyer implementation, no strong analytics framework, no meaningful CRM or lifecycle setup, and no email automation system. Affiliate infrastructure was missing, and broad targeting was being used without sufficient quality controls.

In short, the business lacked both the measurement layer and the funnel systems needed to scale user acquisition efficiently.

Strategy

The strategy was to rebuild growth across four key layers:

1. Attribution and analytics foundation
Set up mobile measurement and event tracking so user quality could be tracked properly across the funnel.

2. Paid acquisition rebuild
Rework Meta and Google App Campaigns to focus on subscription growth and higher-quality installs instead of shallow traffic signals.

3. Lifecycle and activation
Introduce email, push, and in-app messaging to improve onboarding, activation, and paid conversion.

4. Channel expansion
Add affiliates, improve partner tracking, and build broader growth support through SEO and social planning.

Execution

I led the setup of Appsflyer and introduced new conversion events so the business could optimize for more meaningful user actions.

I rebuilt Meta app campaigns and Google UAC / App Campaigns to improve both acquisition scale and downstream subscriber quality. Audience, geo, and creative segmentation were introduced to help identify stronger-performing pockets and improve efficiency as spend increased.

I also set up the affiliate tracking framework and expanded the affiliate strategy as an additional acquisition channel, while improving visibility into partner quality and conversion performance.

On the retention side, I helped establish lifecycle messaging across email, push notifications, and in-app onboarding journeys, which improved user progression from install to paid. Cohort tracking was introduced so performance could be evaluated based on user value over time, not just acquisition volume.

In parallel, I worked on SEO setup and social planning to support broader app discovery and long-term growth.

Results

Over the engagement, the business scaled from an almost non-existent subscriber base into a meaningful paid growth engine.

Key outcomes:

• New paid subscribers: from 2/month to 28,000/month
  
  
  

• Installs: from 10/month to 200,000+/month
  
  
  

• CAC: reduced from $150+ to $8
  
  
  

• Monthly budget: scaled from $800 to $180,000
  
  
  

• LTV: improved from $20 to $95
  
  
  

These results came from improving not only media performance, but also attribution, conversion tracking, onboarding, and lifecycle systems.

Challenges

Scaling a fintech app came with multiple constraints.

A major challenge was increasing volume without letting CAC and CPI rise uncontrollably. The business also had to operate within iOS tracking limitations, compliance constraints common to fintech products, inconsistent affiliate quality, and conversion issues in programmatic channels.

This meant growth had to be managed carefully, with a strong focus on user quality and long-term value rather than install volume alone.

Why This Worked

This worked because the business stopped treating growth as just a media buying problem.

Once attribution was set up properly, campaigns could be optimized around better signals. Once onboarding and lifecycle systems were improved, more installs turned into paid subscribers. Once quality tracking and segmentation were in place, budget could scale much more efficiently.

The result was a full acquisition and conversion engine built around subscriber growth, not vanity metrics.