OTO Call
OTO 국제전화
OTO Call is #155 in Social Networking Free in South Korea and charting in 1 of 24 countries we track.
Updated 28 Sep 2026 · rankings refresh through the day
DeveloperOPENVACS co.,Ltd
CategorySocial Networking
PriceFree
Released
Rating★ 3.3 (446)
Version2.7.6
Age rating4+
First seen by us
26 Sep 2026
26 Sep 2026Rating
3.3 ★
446 ratings
Measured
Best rank now
#155
Social Networking FreeMeasured
OTO Call on the App Store
App details
App ID
406038052
Publisher
OPENVACS co.,Ltd
On the store since
Dec 2010
15 years on the store
Minimum OS
iOS 15.6+
iPhone 6s and later
Devices
iPhone · iPad
Content rating
4+
Languages
5
EN JA KO ZH ZH
Size
19 MB
Also listed in
Utilities
Where OTO Call's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Where it ranks now
Every top chart it appears in across 24 countries.
| Country | Charts | Rank |
|---|---|---|
| South Korea | Social NetworkingFree | #155 |
Apps near OTO Call on the chart
Social Networking Free, around #155.
Ratings
App Store, worldwide.
Rating
3.3 ★
446 ratings
Measured
Ratings
446
Measured
About OTO Call
An easy-to-use international calling service
※ Ranked First in International Call Division of the 2014 App Award Korea ※
※ 2015–2020 Master Consumer Confidence of Korea Brand Awards ※
OTO Call is a global voice service trusted by millions of users.
[Main Functions]
■ International Calling
Place high-quality voice calls to over 90 countries including the United States, Canada, and Japan through your mobile carrier's network.
■ Why Use OTO Call?
Simple calling experience with no need for data or Wi-Fi.
Use your carrier’s voice network for stable call quality.
Wide coverage: connect to 90+ countries without installing additional apps.
(*Calls are made using your mobile voice plan. Charges may apply according to your carrier’s policy.)
If you encounter any inconveniences using our service, please do let us know. We are always all ears for your valuable opinions.
- website : www.otofree.com
- call center : +82-2-16000546
※ Ranked First in International Call Division of the 2014 App Award Korea ※
※ 2015–2020 Master Consumer Confidence of Korea Brand Awards ※
OTO Call is a global voice service trusted by millions of users.
[Main Functions]
■ International Calling
Place high-quality voice calls to over 90 countries including the United States, Canada, and Japan through your mobile carrier's network.
■ Why Use OTO Call?
Simple calling experience with no need for data or Wi-Fi.
Use your carrier’s voice network for stable call quality.
Wide coverage: connect to 90+ countries without installing additional apps.
(*Calls are made using your mobile voice plan. Charges may apply according to your carrier’s policy.)
If you encounter any inconveniences using our service, please do let us know. We are always all ears for your valuable opinions.
- website : www.otofree.com
- call center : +82-2-16000546
Latest updates
2.7.6
Improved call stability and compatibility with the latest iOS versions.
Fixed minor bugs and improved overall performance.