where to find latest train map of Tokyo?

as above - i'm getting confused by so many maps out there, and the number of stations is so massive i'm having trouble finding out where is the station on the map.

if possible, i'd like to have :

- a picture (jpg) version of the latest map
- an Android app that has the map and allows me to search attractions and provide step-by-step directions just like Google Maps, albeit without data connection (offline install).

thank you so much!

For pdfs:

https://www.jreast.co.jp/e/downloads/index.html
http://www.tokyometro.jp/en/subwaymap/

You're probably confused because there are 3 maps. There's a JR map, subway map, and a Suica & Pasmo map (showing all lines). The latter can be overwhelming to look at.