I'm looking for a way of using my phone to record placemarks ... i.e. to pinpoint a position on a map and record that location together with a brief description. I know that I can use "My Maps" within Google Maps on my PC to record placemarks and that I can see the resulting data on my phone using "Layers". However, I would like to be able to record placemarks when I'm out and about. I understand that Google used to distribute a Map Editor Android app, which sounds as if it did exactly what I want, but it has been withdrawn.