Wobin

I've started a short discussion about it a while ago, listing most of the worthwhile VNs on Google Play. In the meantime, the MangaGamer app appeared and I could also add Locked Heart, Wanted: Dragon and Kusoge to the list of somewhat-readable, free stuff on Android.
 

Before I start, I don't know the characteristics of your phone. VNs don't require much computing power, so I doubt there going to be any problems, but it's better to check all the necessary information in each case, if you don't want to buy something that won't work.
Mangagamer started their own Android store recently. NSFW link Most VNs there are nukige (so, just porn), I think, but I definitely highly recommend The House in Fata Morgana, even though it doesn't have routes.
Some popular VN engines, like Kirikiri and OnScripter have unofficial ports on Android. I don't use them so it's better to consult on them with someone who does. Some non-Japanese VNs are easily available directly on Google Play, I think. The one I can think of right away is Everlasting Summer.

It covers the same story as the first season (the second season adapts the VN S;G 0) but it goes into more detail when it comes to the science and the characters. The greatest sin the anime committed was cutting out 4°C 
 
If want to continue reading free VNs at first I would recommend Lucid 9. 

I highly recommend The House In Fata Morgana . It's an amazing read, not too long (20-25 hours), doesn't have a complicated route system, great soundtrack, unique art.
The only caveat is that it might set your expectations too high, it's my favorite VN.

Short answer, Steins;Gate. Slightly longer answer, what I wrote in my own intro that I posted like a day ago 

welcome new, I'm dad

Welcome to Fuwanovel, and I think you did fine in regard of your English there. Also if you need some specific recommendations in regard of VNs, feel free to ask us about that here. I hope that you'll have fun here.

Nice to meet you too! 
 

Welcome to Fuwa 
Hajimemashite  (Nice to meet you)

Welcome to Fuwanovel! 
So, have you read Katawa Shoujo in full yet? If you did, I could recommend trying some other freeware VNs, like Lucid9, Cupid or One Thousand Lies.

Well, I saw some videos on youtube about Katawa shoujo, after I played that VN  I really liked it, after that I started to play other VNs and I thought I could join a community to receive recommendations and talk about this, What got you into this?

I just created my profile and I thought I should introduce myself.
I'm not used to creating blogs of any kind but I'll try to be active here and to learn how this is done.
I'm new with VNs and I'm learning all the terms I can but I haven't played many, so I would appreciate any advice and  recommendations.
Also just to clarify if there is any inconvinience with my writing, I speak spanish and I am still learning english, I hope I didn't write anything without sense...
I just read the rules but let me know if this is not the place i should be posting this or feel free to delete my post.