The app itself is designed well, the UI is clean and quick. However, the numerical flags listed on the app are not numerals 0-9, but the signals for pennants 0-9. There are different flags for the numbers themselves.
In the future, I would like to see an expansion of the possible meanings expanded to military use. For instance, Third Sub is flown when the commanding officer is ashore in port, India is flown when mooring alongside another ship, Romeo is flown during underway replenishments, etc.
Otherwise good app, look forward to updates.