Islamic Apps for Ramadan, Android & iPhone O.S
alQibla
A comprehensive Qibla finder based on your location with search facility too, this also includes prayer times calculation based on various methods with the ability to share the prayer times with your friends and family. There are other features such as different adhaan for each prayers
https://play.google.com/store/apps/details?id=com.eqibla.alQibla
https://itunes.apple.com/au/app/alqibla/id322401779
Ramadan 2013
has the entire Ramadan timetable for your city in English
https://play.google.com/store/apps/details?id=ramdan.alarm
https://itunes.apple.com/app/ramadan-times-2012/id526009990
Shahr Ramadan, Iftaar and Imsak times (Arabic)
when to begin and end fasting can be tricky. Well with the Shahr Ramadan app you’ll be able to do just that without much fuss, it will get the times for you based on your location.
https://play.google.com/store/apps/details?id=com.euphratesmedia.shahrramadan
https://itunes.apple.com/app/shhr-rmdan/id453984696
iDuas Ramadhan
Specially picked duas just for Ramadan and special nights such as Laylat al-Qadr. It has a feature to download the duas in MP3 format
https://play.google.com/store/apps/details?id=com.ecnetsolutions.iduasramadhan
https://itunes.apple.com/app/iduas-ramadhan/id385353036
Resala Ramadan
learn all about Ramadan all in one app. It covers many topics such as the rewards for providing food, the wisdom behind fasting and much more
https://play.google.com/store/apps/details?id=org.yufid.resalaramadan
https://itunes.apple.com/app/resala-ramadan/id386285288
Tasbih+
An easy and simple to use tasbih app, good if you forget to carry your beads with you.
https://play.google.com/store/apps/details?id=air.com.anakule.itasbih
https://itunes.apple.com/app/id604418700