Mobile VoIP provider Vopium updated its iPhone app, allowing users to top-up their accounts via in-app payments, instead of having to enter credit card details for calls to non-Vopium users (i.e. mobile phones and landlines).
In addition, version 2.1 also comes with presence indication of Vopium contacts for push-notification-based calling. This feature is said to increase the likelihood of free calls by ensuring that Wi-Fi/3G calls go through even when the app is in the background or closed. The moment the Vopium app is launched, other Vopium users among your contacts are highlighted.
The updated iPhone app follows Vopium’s recent announcements of an upgraded Android app, which we covered some 3 weeks ago…
Vopium (FREE) [iTunes link]