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App Marketing

Cutting cost per trial by 31% for a language learning app

Language learning app Mobile apps · Global, English and Spanish markets 3 months
$11.40 → $7.90cost per trial
9% → 14%day-7 retention of paid users
+18%store page conversion

The challenge

Campaigns were optimised for installs, so the platforms found people who installed and left. Only 1 in 6 paid installs started a free trial, and day-7 retention for paid users was 9%.

The trial event was not being sent back to the ad platforms, so they had no way to learn which users mattered.

What we did

  1. Event set-upWe set up trial_start and subscribe events in AppsFlyer and sent them to Google, Apple Search Ads and Meta.
  2. Campaign changesCampaigns moved from install bidding to trial bidding, with separate campaigns for English and Spanish speakers.
  3. Store listing testsTwo rounds of screenshot and title tests on the App Store and Google Play.
  4. Weekly cohort reviewOur team reviews retention by campaign each week and shifts budget toward the sources whose users stay.

Who does what

Handled by automation

  • Daily budget pacing across three ad platforms
  • Alerts when cost per trial rises above target
  • Weekly cohort report from AppsFlyer

Owned by our team

  • Campaign structure and bidding strategy
  • Store listing tests and creative briefs
  • Budget decisions based on retention, not installs

Results

Results before and after
MeasureBeforeAfter
Cost per trial$11.40$7.90
Paid installs starting a trial16%24%
Day-7 retention, paid users9%14%
App Store page conversion28%33%

Monthly spend stayed between $28,000 and $31,000 throughout.

Tools

  • Google App Campaigns
  • Apple Search Ads
  • Meta
  • AppsFlyer

This is a sample case study, shown while our client studies are approved for publication.

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