Sipdroid is a free app for Android that belongs to the category Communication, and has been developed by i-p-tel GmbH.
More about Sipdroid
This app is best known for the following features and qualities: voip app, save money & keeping in touch with family, quality calls & google voice.
People say easy setup with google voice, multiple accounts, including gotalk which had weird audio quality problems prior to pbxes.
If you like Sipdroid you'll also enjoy: Zoiper IAX SIP VOIP Softphone, GrooVe IP Pro (Ad Free), GrooVe IP Lite Free Calls, Media5-fone VoIP SIP Softphone, Bria VoIP Softphone SIP Client, Cheap International Calls.