updating readme and screenshot

README.md

@@ -1,7 +1,18 @@
 # Simple Thank You
 <img alt="Logo" src="app/src/main/res/mipmap-xxxhdpi/launcher.png" width="80">
 
-A paid app for people who want to support me this way, not doing anything whatsoever.
+A paid app for people who want to support us, not doing anything whatsoever.
+
+If you like our apps which are free, non-intrusive and have no ads, please consider supporting us in some way. It will be hugely appreciated.
+
+This app doesn't do anything, but it has a dark theme. That looks cool. It saves your battery and stuff.
+
+This app is just one piece of a bigger series of apps. You can find the rest of them at http://www.simplemobiletools.com
+
+<a href='https://play.google.com/store/apps/details?id=com.simplemobiletools.thankyou'><img alt='Get it on Google Play' src='https://play.google.com/intl/en_us/badges/images/generic/en_badge_web_generic.png' height=60/></a>
+
+<img alt="App image" src="screenshots/app.png" width="250">
+<img alt="App image" src="screenshots/app_2.png" width="250">
 
 License
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