Add links to F-Droid

README.md

@@ -5,7 +5,8 @@ allowing you to achieve your long-term goals. Detailed graphs and statistics
 show you how your habits improved over time. It is completely ad-free and open
 source.
 
-<a href="https://play.google.com/store/apps/details?id=org.isoron.uhabits&utm_source=global_co&utm_medium=prtnr&utm_content=Mar2515&utm_campaign=PartBadge&pcampaignid=MKT-AC-global-none-all-co-pr-py-PartBadges-Oct1515-1"><img alt="Get it on Google Play" src="https://play.google.com/intl/en_us/badges/images/apps/en-play-badge-border.png" width="200px"/></a>
+<a href="https://play.google.com/store/apps/details?id=org.isoron.uhabits&utm_source=global_co&utm_medium=prtnr&utm_content=Mar2515&utm_campaign=PartBadge&pcampaignid=MKT-AC-global-none-all-co-pr-py-PartBadges-Oct1515-1"><img alt="Get it on Google Play" src="https://play.google.com/intl/en_us/badges/images/apps/en-play-badge-border.png" height="75px"/></a>
+<a href="http://f-droid.org/app/org.isoron.uhabits"><img alt="Git if on F-Droid" src="http://i.imgur.com/baSPE7X.png" height="75px"/></a>
 
 ## Features
 
@@ -72,7 +73,7 @@ contribute, even if you are not a software developer.
 
 ## Installing
 
-The easiest way to install Loop is through the [Google Play Store][playstore].
+The easiest way to install Loop is through the [Google Play Store][playstore] or [F-Droid][fdroid].
 You may also download and install the APK from the [releases page][releases];
 note, however, that the app will not be updated automatically.  To build this
 app from the source code, you will need to install the [Android SDK
@@ -120,3 +121,4 @@ installed on the device through [adb][adb]:
 [playstore]: https://play.google.com/store/apps/details?id=org.isoron.uhabits
 [releases]: https://github.com/iSoron/uhabits/releases
 [adb]: https://developer.android.com/tools/help/adb.html
+[fdroid]: http://f-droid.org/app/org.isoron.uhabits