Mosaic has no accounts and no servers, so there is nothing for me to delete and nothing you need to request. Everything the app keeps is on your device:
- There is no account to close — Mosaic never asks you to sign in.
- Delete the app from your iPhone. This permanently removes every saved collage and every setting, including your layouts, trim points, and export preferences.
- Delete your exported collages separately, from the Photos app. Anything Mosaic saved lives in your photo library rather than inside the app, so it survives deleting the app. Remove them in Photos, then empty Recently Deleted.
- To withdraw access without deleting the app, go to iPhone Settings → Privacy & Security → Photos and change what Mosaic can reach.
Because the app has no backend, there is no server-side copy of anything — no media, no collages, no settings, no identifiers.