Cash My Charge is a lifestyle reward service that turns smartphone-charging habits into income. It combines charge-based rewards with a sophisticated ad-revenue model — delivering daily benefits for users and maximized ad efficiency for the business as an app-tech platform.
Client
Triggers
Year
2025 – 2026
Scope
Android Development (solo)
Platform
Android · Kotlin · RxJava · Coroutine · Compose · MVI
The Challenge
Continuously improve ad revenue (eCPM) across multiple networks, prevent user drop-off during ad no-fill, keep a live app-tech service stable at 99%+, maximize revenue without degrading UX through ad cadence/placement, and stay compliant with Google Play policy changes and ad-SDK updates.
Our Solution
Managed AdMob / AppLovin waterfall and bidding strategies precisely to keep improving eCPM; designed House-Ad / in-house campaign fallbacks for no-fill scenarios and ran A/B tests to pick the highest-converting variant; monitored live crashes and runtime issues via Firebase Crashlytics and resolved them immediately; asynchronously scheduled ad calls and tuned impression timing / placement to reduce ad fatigue; and proactively tracked SDK and policy changes to protect store standing.
Results
Lifted eCPM and ad revenue through network optimization, minimized expected revenue loss in no-fill scenarios via A/B-tested fallbacks, maintained crash-free rate at 99.5%+ in live operation, and established a data-driven decision-making process that improved ad efficiency and session time.