Modularizing at Scale: How Halodoc Adopted Android Dynamic Feature Modules

Halodoc reduced their Android app size by 40% and improved install conversion by 11% using Dynamic Feature Modules (DFM). By extracting less-frequently used features like calling into on-demand modules delivered via Play Core, they achieved 25% faster downloads, 54% smaller on-device footprint, and 52% lower uninstalls. The implementation involved creating DFMs with proper manifest configuration, integrating them as submodules, orchestrating downloads through a centralized manager, and extensive testing across build flavors and update scenarios. Key challenges included testing complexity with Internal App Sharing and managing user experience during module downloads.