Apps like SpectrumVoIP ES

Here are some great alternatives to SpectrumVoIP ES by SpectrumVoIP Developer :
MobiCalls VOIP Calls
MobiCalls VOIP Calls
★3.8
HelloSpoke Mobile
HelloSpoke Mobile
★4.0
Anywhere Connect
Anywhere Connect
★3.4
TeleConsole
TeleConsole
★4.0
12Voip
12Voip
★4.4
voipoffice
voipoffice
★4.0
SessionTalk Softphone
SessionTalk Softphone
★3.6
Vodia Phone
Vodia Phone
★3.7
Wildix Collaboration Mobile
Wildix Collaboration Mobile
★4.4
007VoIP Cheap VoIP calls
007VoIP Cheap VoIP calls
★3.7
VoIP Duocom
VoIP Duocom
★5.0
Improcom
Improcom
★3.7
Vonage Home Extensions - VoIP
Vonage Home Extensions - VoIP
★3.8
Fast Call
Fast Call
★4.1
VirtualPBX Softphone
VirtualPBX Softphone
★3.8
CallPirates - Cheap calls
CallPirates - Cheap calls
★3.5