A close-friend social app: users in invite-only groups (up to 12 people) shoot 2–3 second videos on hourly reminders; at day's end the app auto-stitches the group's clips into a shareable split-screen vlog.

That friend-sharing demand outlived BeReal: hourly raw clips auto-stitched into shared vlogs give small groups the moment and the memory, without BeReal's pressure.

New Chat Inc., an early-stage startup led by US engineer Devin Doty (8.5 years at Snap), launched Setlog for iPhone in December 2025 (per Korean press), targeting Korea first, then Japan and Taiwan. The name combines Korean 'set' (three) and 'log' — groups began at three people and expanded to 12 in April 2026.

Growth was organic and steep: #1 on Korea's App Store social-networking chart on April 3, 2026, and also #1 in Taiwan and Hong Kong; Naver search volume for Setlog (셋로그) jumped about 10x in a week (Apr 20–27 vs Mar 30–Apr 5); the Android beta arriving April 23 passed 500K cumulative downloads in five days; AppMagic measured 1.8M+ downloads in the trailing 30 days as of May 6. K-pop acts Seventeen and Karina (Aespa) posted Setlog vlogs — Seventeen's 11th-anniversary group video drew 8.3M Instagram views — and Appfigures counted 2M+ downloads in May. On June 1 the app sat #3 on Korea's App Store, ahead of Google Gemini and Anthropic's Claude.

Still growing and free as of June 2026 with no ads or monetization; the open questions are privacy concerns from hourly location and routine recording, peer pressure from blank time slots, and whether the habit and business model outlast the hype — the cliff BeReal hit.

The need outlived the product: BeReal's 50M+ peak users proved demand for unfiltered friend-sharing, and Setlog's design answers each reason people deleted BeReal.

Tool value is embedded in the social loop: the auto-stitched vlog is an output users want to keep and export, driving retention beyond the daily prompt.

Zero-buying growth: with no traceable ad spend, K-pop posts, X views and Instagram hashtags did the distribution, keeping CAC effectively zero.

Timing matches platform fatigue: in Korea and Japan, where social anxiety and Instagram polish fatigue run high, invite-only small circles feel like a safer space.

A dead category can come back if you fix the mechanism, not the need: BeReal proved demand for raw friend-sharing, and Setlog kept the need while removing the pressure and the editing barrier.

As of 2026-06-03 Setlog is free, ad-free and pre-revenue, riding word-of-mouth across Korea, Japan, Taiwan, Hong Kong and Singapore, with an early-stage team led from the US by Devin Doty. The company faces the BeReal precedent of viral-then-fade, privacy criticism over hourly life-logging, and the unanswered question of monetization at scale.

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The sources

  1. 霸榜日韩一个月,给年轻人的社交App卷土重来? 白鲸出海 / 创业邦 · cyzone.cn ·
  2. “인스타보다 좋다”…Z세대 생생 소통앱 ‘셋로그’ 열풍 농민신문 (Nongmin) · nongmin.com ·
  3. Nova rede social para postar fotos de hora em hora conquista astros do K-pop e já ultrapassou apps de IA PEGN (Globo) · revistapegn.globo.com ·
  4. Gen Z Embraces Real-Time Sharing App 'Setlog' in Korea Seoul Economic Daily (English) · en.sedaily.com ·