As one of the top games studios in Uruguay, Pomelo Games takes their user experience seriously. With five popular games and an International Mobile Gaming Award nomination under their belt, the team at Pomelo Games prides themselves on developing unique and polished games that capture players' imaginations.

Their recent release, Once Upon a Tower, "is an easy-to-pick-up, hard-to-put-down, free-to-play game," says co-founder Jonás Mora. A Play Store Editors' Choice, the game is beloved for its high-fidelity graphics, as well as the "fairness of its free-to-play mechanics," says Jonás.

So when the team needed to improve the game's monetization, they were unsure how to proceed. How could they increase revenue without sacrificing the affordability their players loved?

One idea was to include interstitial ads, but Jonás was initially opposed to the idea. "Personally, I would delete any game containing interstitials right after downloading it," he says, and he assumed Pomelo's price-conscious players would too. Still, he agreed to test his theory using Firebase.

The team used Firebase Remote Config and Firebase A/B Testing to test the effects of showing interstitial ads to their entire player base versus a specific sub segment. Then, they used Google Analytics to measure the impact on revenue. They also monitored Google Analytics for changes in retention and used Firebase Crashlytics to keep an eye on stability.