
App the Horror

When the app is launched, a ghost appears. Developed by four young adults, the app becomes the centerpiece of a livestream where they venture into a supposedly haunted mountain to prove its authenticity—only to meet a grim fate.

Download cinematic wallpapers from their filmography · 11 movies
Quick answers about Yang Jo-a wallpapers, cast, and downloads.
Moviely lists cinematic wallpapers from 11 films Yang Jo-a starred in, available in 4K and HD.
Yes. All Yang Jo-a movie wallpapers on Moviely are free to browse, preview in Mac Mode, and download.
Yang Jo-a is known as a acting with wallpapers available from 11 films on Moviely.
Browse Yang Jo-a movie wallpapers on Moviely — each film links to full 4K backdrop galleries you can download.
Yes. Open any film starring Yang Jo-a, pick a backdrop, and use Mac Mode to preview on desktop or iPhone before downloading.
Popular Yang Jo-a films with wallpapers on Moviely include App the Horror, Champion, The Land on the Waves, Mad Dance Office, Concerning My Daughter, Unknown, Beautiful Voice, Camping, and more.
Yes. Moviely sources official cinematic backdrops from Yang Jo-a's films, many in 4K and original quality.
Yes. Moviely hosts cinematic App the Horror wallpapers from scenes featuring Yang Jo-a as Sun-young.
Open the App the Horror page on Moviely to browse and download 4K backdrops from this Yang Jo-a film.
Yang Jo-a played Sun-young in App the Horror (2026).
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