When a new version is out, both apps — yours and the child's — show “A new version is out” at the bottom by themselves, with a short list of what is new and an “Update” button. The update downloads from Google Play right inside the app; when it is ready, tap “Restart and update”.
- “Later” — the window won't show again for this version; the next version will show again.
- The window never appears over an SOS.
- You can also update as usual: Google Play → “Manage apps”.