2.2
82.9K reviews
1M+
Downloads
Content rating
Everyone
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About this app

K12Online is a system to support the whole process of training management, support for teaching - learning, and online testing for general education and continuing education institutions. Designed and built towards a full-featured online education platform for every type of audience in the education industry, from administrators to teachers, students and parents.

Students can self-study, do exercises, take tests, participate in online classes, discuss online... and discover many other utilities right on the K12Online application.

Combined with the available web version, the K12Online application can help managers at the Department/Department/school level to monitor and use the necessary features to support the management, teaching and testing of students. unit.
Updated on
Dec 19, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection
Committed to follow the Play Families Policy

Ratings and reviews

2.2
78.9K reviews
Nguyen Anh Tuan
November 3, 2025
The UI improved and I never get app crash and login error again. But now i have a problem that the video doesn't start every time I open it. It just spin around ( even i have a strong internet connection) . I left the app and returned, cleared cache, seems like it didn't want to work...
3 people found this review helpful
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Viettel Business Solutions Corporation
December 12, 2024
Xin lỗi Quý khách về trải nghiệm chưa tốt về dịch vụ. Chúng tôi xin ghi nhận ý kiến và nỗ lực cải thiện, nâng cao chất lượng dịch vụ. Quý khách vui lòng liên hệ tổng đài 18008000 nhánh số 2 hoặc gửi mail đến địa chỉ cskhdn@viettel.com.vn. Trân trọng cảm ơn.
Sei
October 23, 2024
Can't even enter the app properly at times. My wifi and device is alright so it's the app's problem. Even when I've already completed my lessons it's still marked as less than 100 percent completion. 1 star. This is very frustrating because completing lessons on this is COMPULSORY if you want good grades. This affects me ( and my classmate ) very negatively
23 people found this review helpful
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Viettel Business Solutions Corporation
February 16, 2025
Cảm ơn bạn đã đồng hành và ủng hộ K12Online ạ! K12Online luôn không ngừng cố gắng để phát triển ứng dụng K12Online, mang đến nhiều tiện ích và trải nghiệm tốt nhất cho người dùng. Bạn vui lòng cung cấp thêm thông tin qua hotline 18008000 (nhánh số 2) hoặc email tới địa chỉ k12online@viettel.com.vn để K12Online kiểm tra và hỗ trợ nhé ạ!
Cookies
November 12, 2021
Need fix all connection failure, experience in-app not smooth enough even how good hardware is. The UI & Information are so different from browser and desktop version, therefore hard to quick-switch between 2 devices when there is a connection failure or out of battery,etc. P/s: If you can do mobile version as good as this, why don't you do the similar thing with desktop version.It lacks almost all of available feature on mobile version.
28 people found this review helpful
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Viettel Business Solutions Corporation
June 13, 2022
Thank you for your responding. We apologize for the incovenience you experienced. Please feel free to contact us for further support via k12online@viettel.com.vn!