RobinPhone vs Viber
Viber is a messaging app — calls are free between Viber users, and reaching ordinary phone numbers means using paid Viber Out. Both require installing the app and registering with a phone number. RobinPhone skips all of that: open a browser tab and call any landline or mobile in 175+ countries, pay-as-you-go from $0.02/min, with nothing to install.
RobinPhone vs Viber
| Feature |  RobinPhone | Viber |
|---|---|---|
| App required | No — runs in your browser | Yes — install + register |
| Call any phone number | Yes | Viber Out only (paid) |
| Recipient needs the app | No | Free only if they use Viber |
| Registration | Just sign up | Phone number + app |
| Pricing | From $0.02/min, pay-as-you-go | Viber Out credit / per-minute |
| Works in a browser | Yes | Limited (desktop app) |
Pricing
Viber calls are free between app users; calling ordinary phone numbers uses paid Viber Out (prepaid credit or a subscription). RobinPhone is browser-based pay-as-you-go with no app for you or the person you call.
RobinPhone rates to popular destinations (per minute):
| United States | $0.02/min |
| United Kingdom | $0.02/min |
| Japan | $0.04/min |
| Philippines | $0.28/min |
| Australia | $0.03/min |
Live rates — see the full rates for 175+ countries.
The verdict
Choose Viber if you mostly call other Viber users in-app. Choose RobinPhone when you need to reach any real landline or mobile abroad — no app for either side, from a browser, at low per-minute rates.