PUBMATIC'S OPENWRAP SDK DELIVERS A 17% CPM UPLIFT FOR TIMETREE

TimeTree is a shared calendar app that makes it easy for groups to share and manage schedules. Users can create multiple calendars for different groups, including family, partners, friends, and colleagues, keeping everyone’s plans organized in one place. Launched on March 24, 2015, TimeTree has grown to more than 75 million registered users worldwide as of June 2026. 

THE CHALLENGE

TimeTree had already improved CPMs by implementing bidding solutions outside of Prebid,  but saw limited room for further growth with its existing solutions. With a significant share of its traffic coming from international users, improving CPMs across its global traffic was a key priority.  

Many of TimeTree’s existing demand partners focused primarily on traffic from Japan, but the app’s users were based outside of Japan. TimeTree needed a Prebid-compatible partner that could bring more global demand into the auction and help strengthen monetization across its international traffic. 

THE SOLUTION: OpenWrap SDK

TimeTree implemented PubMatic’s OpenWrap SDK to increase competition across its international traffic. By integrating OpenWrap SDK within its existing GAM setup and connecting multiple bidders, including PubMatic, TimeTree expanded its access to global demand. This brought more demand into the auction for its international traffic, where competition had previously been limited.

OpenWrap SDK also enabled TimeTree to capture higher bids through Prebid for impressions that would otherwise have moved down the waterfall. This increased competition across its international traffic, driving significant CPM gains and increasing ad revenue by up to 17%.

While the GAM integration involved some technical complexity, PubMatic’s technical support team worked closely with TimeTree throughout implementation and launch, helping ensure a smooth deployment of the OpenWrap SDK.

PubMatic’s technical support team worked closely with us throughout the OpenWrap SDK implementation, from initial setup through launch. Their support gave us confidence at every stage and helped ensure a smooth deployment. The OpenWrap SDK has expanded our access to global demand and helped us improve monetization. We look forward to continuing our partnership with PubMatic and driving even stronger performance.

Takuya Kataoka
Manager, Network Advertising Team
TimeTree
Source: TimeTree internal data

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