Publications

Adjust supported Millie’s Library in improving precision marketing

Learn how publication app Millie’s Library increased marketing efficiency with detailed event configuration and quick reporting from an all-in-one dashboard.

Identified churn points for each type of content and medium using subscriber funnels.

Optimized marketing by attributing in-app event data to paid media channels.

Streamlined and quickened decision-making with an all-in-one user-friendly dashboard.

Background

With a cumulative subscriber base of about 8 million, Millie’s Library is South Korea’s largest reading platform. The service enhances the value and enjoyment of people’s daily lives. It has pioneered several innovative services, such as South Korea's first monthly book subscription service and the country's first unlimited ebook subscription service.

As of 2024, the platform provides 180,000 reading materials. Millie’s Library offers a diverse range of content, including ebooks and audiobooks, audio dramas, educational materials, and innovative formats like chatbooks–conversational e-books that combine elements of storytelling with chat-style interfaces.

Region

APAC

Founded

2016

Vertical

Publications

The challenge

Millie’s Library needed to reorganize its existing event settings to ensure data consistency and accurate measurement of user engagement across its platform. With diverse content offerings and a large subscriber base, the platform faced challenges in maintaining a clear and uniform approach to event tracking, particularly for key user actions like subscriptions, payments, and engagement across content types. This inconsistency in event settings and tracking created barriers to obtaining reliable data for measurement and optimization of marketing performance.

The team was looking for a mobile measurement partner (MMP) that could not only address their immediate needs but also offer enhanced performance and reporting features.

The solution

After reviewing multiple providers, Millie’s Library selected Adjust to deliver accurate, unbiased data, simplify event configuration, and offer dedicated support to streamline their marketing strategy and drive long-term growth.

With Adjust’s swift and professional support, user-friendly interface, and detailed event configuration, the team was able to optimize event settings, improve data consistency, and enhance marketing performance. Adjust’s team worked closely with Millie’s Library to completely reorganize event settings. This included defining and aligning user behavior indicators related to key actions (e.g. subscriptions and payments) and cross-referencing these with server data for accuracy.

“We have been impressed by Adjust’s combination of professional support and the platform’s intuitive interface. It was so easy to redefine and align our event settings. The Adjust team’s expertise and responsiveness helped us navigate our more complex data needs. Now we’re able to make confident, data-driven decisions that have significantly enhanced our marketing impact.”

Lee Songjae

Performance Marketing Manager, Millie’s Library

Using Datascape, Adjust’s intuitive, all-in-one dashboard, Millie’s Library tracked and analyzed data effortlessly. The dashboard enabled quick configuration of key metrics without the need for OS-specific data segmentation, allowing the team to monitor and make real-time decisions. This streamlined approach empowered Millie’s Library’s marketing managers to conduct detailed funnel analysis, tracking the entire customer journey from subscription to payment and cancellation, optimizing both campaign management and resource allocation.

The results

With the help of Adjust, Millie’s Library was able to:

  • Cross-verify data following app updates or changes in key metrics.
  • Enhance content by analyzing churn points for each type of content and medium using subscriber funnel setups.
  • Attribute event data back to paid media channels, leveraging this data as a learning tool to enrich and optimize campaigns.
  • Streamline decision-making and faster response times with an all-in-one dashboard with a user-friendly interface.
  • Discover new growth opportunities by setting up detailed, targeted events for subscription and payment areas, allowing for optimized resource allocation.

Adjust will continue to support Millie’s Library’s growth, enabling South Korea’s leading reading platform to optimize innovation.

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