OpusTel vs TalkTT

OpusTel OpusTel is the mobile phone App for iPhone, iPod and iPad, permitting one to use a real Swiss international telephone number, e.g. 0041 41 520 60 00. It allows one to make and to receive secure VoIP calls from any iOS device using 5G/4G/3G/UMTS or Wi-Fi Internet connectivity. It was developed with the focus on privacy. Features: 1. Secure incoming and outgoing calls 2. Incomming calls are free of charge (no roamingcosts) 2. HD high-definition audio quality with the G722 and Opus codec 3. Free global calls from OpusTel to OpusTel 4. Easy transfer calls to any telephone number 5. Ability to record incoming and outgoing calls 6. Conference calls 7. Automatic language selection based on handy language (15 languages like EN, DE, CN, FR, ES, IT ...)

TalkTT is an app which lets you buy phone numbers from 80+ countries to make/receive calls or send/receive sms, or buy phone plans from 30+ countries, or buy eSIMs from 150+ countries to go Internet with local network without roaming fee. FEATURES - Make phone calls or send text messages on your iPhone/iPad to any international destination - Buy DID phone numbers from 80+ countries or regions to make/receive calls or send.receive text messages. - Buy phone plans from 30+ countries or regions to make/receive calls or send/receive text messages. - Buy Special Offer phone numbers from popular countries like USA/Canada/UK/Belgium/Australia/Brazil etc. - Buy eSIMs from 150+ countries or regions to go Internet with local network to avoid roaming cost. - Voice Mail will be provided automatically once you have DID phone numbers with us. - Support many advanced features like Caller ID/Call Forward/Call Block/SMS Delivery Status/Phone Number Lookup/Phone Number Recover etc. - Select regular contacts from the contact list to make a call or send SMS. - Check history call records from Recent Calls. - Choose your favorite voice prompt language from Settings. - Choose your favorite rate plan from Standard/Premium/Gold/Direct plans. - Choose auto prefix to format your local calls automatically. Auto Detection for calling number: Before each call has been sent out, our system will check the number you dial and give you alert if we find the number doesn't seem to be a valid number according to your auto prefix setting and give you options to continue calling or cancel it to change. If you have any questions about using our app, you can open our app, then go to "Settings"->"Contact Us" to send one message to us. Our support will help you in the first place. Thanks.