ANDROID
(1) https://play.google.com/store/apps/details?id=com.vasithwam.tamil.thirumurai.thirumanthiram&hl=en
(2) https://play.google.com/store/apps/details?id=com.itabtechnologies.thirumanthiram&hl=en
APPLE
(1) https://itunes.apple.com/us/app/thirumanthiram-book-devotion/id763718032?mt=8