Nạp thẻ bằng camera is an Android application developed by Assistive Touch. As the name suggests, it is a utility tool that allows you to scan and recharge your mobile card using your device's camera. The app is available for free on the Google Play Store.

The application is straightforward to use. You need to launch the app, place the card in front of your device's camera, and scan it. The app automatically detects the card's number and prompts you to enter the recharge amount. Once you enter the amount, the app recharges your card instantly. The app supports all major mobile operators in Vietnam, including Viettel, Mobifone, and Vinaphone.

Overall, Nạp thẻ bằng camera is a useful tool for anyone living in Vietnam who wants to recharge their mobile card without the hassle of entering a long recharge code. It is easy to use, and the app's interface is clean and straightforward. However, the app could benefit from additional features like the ability to save card details and transaction history.