The dingtone app is a phone service that allows users to make unlimited international calls and SMS with low rates, or even for free. Dingtone was founded in 2012 and has since become a renowned provider of reliable telephone services. With the dingtone app, users can easily call any mobile or landline number in over 200 countries at very low rates. Additionally, the service provides notifications for incoming calls and SMS/MMS messages, so you can always stay connected.