Sentinel

Sentinel is an events app by Kaichro with 5+ downloads (about 7 estimated). Released Jun 18, 2026. Install growth, rank history, SDKs and ad networks.

From the store listing: “Sentinel makes lost-and-found simple for events, venues, camps, conferences, and private gatherings. Register items with a QR code, link them to your event, and let finders scan to return items quickly. Sentinel is designed to reduce the stress of missing belongings and give organizers a fast, clean way to manage…”