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Where this app stands in South Korea, updated 9 Oct 2026
Top free · Communication
#98 ▼13
Top grossing
Not in this chart today
Top paid
Not in this chart today
| Date | Free |
|---|---|
| 9 Oct 2026 | #98 |
| 8 Oct 2026 | #85 |
Best rank in each country today. Click a country to see its graph.
A free international call service with no international call charges
OTO Free International Call app provides free international calls and it doesn't charge any international call fee, while it uses your additional/video call minutes given monthly by your carrier company. [Main Functions] ★ Free International Phone Calls - You may place free international phone calls to the United States, Canada, Japan, etc. to most of the countries in Korea. (However, free phone calls are available according to the payment plans of smartphones.) ★ Why OTO Free International Phone Calls? 1. OTO Free International Phone Call is free because it does not incur costs for any international phone calls placed. 2. You may use international phone calls via the local voice phone bills, so no worries. 3. Unlike other services that offer free service to a limited range of countries, OTO offers free phone calls to most of all countries. If you encounter any inconveniences using our service, please do let us know. We are always all ears for your valuable opinions. - website : www.otocall.com - call center : +82-2-16000546