A free South Korean app called Setlog is surging in popularity after K-pop icons began using it. All nine active members of Seventeen, along with Karina from Aespa, have posted daily vlogs created through the platform.

The app's premise is straightforward: a group of friends commits to recording short videos each hour, which Setlog then assembles into a single portrait-orientation recap video. The result is shareable across social media and offers a raw, unedited look at daily life — a contrast to polished influencer content.

Seventeen's members tested Setlog during their 11th debut anniversary celebrations, recording a group log that captured their day. The app follows in the footsteps of earlier friendship-focused platforms like BeReal and Timeleft, which also emphasize authenticity over curation.

Setlog's viral rise highlights a continuing demand for social tools that prioritize real connection. For friends separated by time zones, the app provides a window into each other's routines, revealing who wakes early and who burns the midnight oil.

Critics may question whether such apps can sustain engagement beyond initial novelty. The platform's long-term utility will depend on user retention beyond the current K-pop-fueled hype cycle.