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Viettel's Tammi App Reaches 20 Million Users in Three Months

Software2 min read

Viettel's messaging and digital services app Tammi has reached 20 million users about three months after its official launch. Viettel says many of these users are not Viettel customers.

Tammi hits 20 million users

Viettel Telecom, the telecom unit of Viettel, said on October 27 that its app Tammi has passed 20 million users. The app was first put on app stores in April but was used only inside the company. It was released to the public in August. Since then, it has often been among the top free apps for downloads on both iOS and Android in Vietnam.

Key numbers

  • 20 million users, about three months after the public launch
  • About 10% of users are customers of other mobile networks
  • Daily active users compared with monthly active users (DAU/MAU) was close to 30% in October
  • That means about 3 out of every 10 monthly users open Tammi each day
  • Users must sign up with a verified mobile number to prove they are real people

What Tammi does

Tammi combines chat, calls, and online meetings with everyday services. These include payments, ride booking, delivery, and managing phone service. Tammi also has Official Accounts so that people can connect with businesses, agencies, and groups. Viettel uses its large network, which reaches into small villages, to check that organizations are real. Users can also verify their accounts through VNeID, Vietnam's national digital ID app. Local government control centers, called IOC, can also connect to the app.

Why it matters

Tammi shows how Viettel wants to change from a phone company into a technology company. Vietnam already has many chat apps, so Viettel says it wants to build a full digital platform, not just another messaging app. Experts say its telecom base and customer network give it a strong start. Viettel's chairman, Hoang Trung Thanh, said 20 million users is only a beginning. He said the app's long-term success will depend on how often people use it, how much they trust it, and how useful it is.

What to watch

  • Whether users keep opening Tammi every day, not just download it
  • How many people from other mobile networks stay on the app
  • Whether businesses and local governments use Official Accounts widely
  • How well Tammi keeps user trust and protects personal data

Glossary

Viettel Telecom
The telecom company part of Viettel that runs mobile phone and internet services in Vietnam.
Tammi
A Viettel app that combines messaging, calls, online meetings, and everyday digital services.
DAU/MAU
A way to measure how many monthly users also use an app each day. A higher number means more regular use.
VNeID
Vietnam's national digital identity app used to confirm a person's identity online.
IOC
Short for Intelligent Operations Center, a central system local governments use to monitor and manage city or area activities.

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