This document summarizes Indonesia's digital landscape in 2018. It finds that Indonesia has over 143 million internet users, with smartphone usage dominant at 90%. Apps are highly used, with Indonesians spending 88% of their time on apps daily and using an average of 40 apps per month. Android dominates the mobile OS market at 91%. Top activities on apps include chatting, social media, and streaming video. E-commerce is growing rapidly at 3.1% of total retail sales, though cash on delivery remains the preferred payment method. The travel, gaming, and fintech industries are also growing substantially in Indonesia through increased app usage on smartphones.