To open the National Karachi app, one first had to click on the National Karachi icon on the phone's desktop. Then, he went to the National K Songs homepage and clicked on the K Songs option. Next, choose the song you want to sing on the song selection interface. After entering the interface of the song, click on the button I want to karaoke to start using the National karaoke song. If you wanted to use the app on a computer, you could download the app or use the web version to open the app.
The computer version of National Karachi did not have a karaoke room. If one wanted to enter the karaoke room, they could only use the National Karakorum APP on their phones. On the home page of the APP on the phone, you could find the karaoke room function and click to enter. If no one invited them, they could only enter the karaoke room without a password. In addition, VIP users could gift karaoke rooms to non-VIP users so that they could create their own karaoke rooms. If you want to enter the karaoke room on your computer, you can install an Android compatible simulator on your computer, such as BlueStacks or NoxPlayer, and download and install the PC version of the karaoke app in the simulator.
As of now, Uta is indeed alive. The story hasn't depicted anything otherwise. Maybe there'll be changes in the future, but for now, Uta's part in the manga continues with them being alive.
Tanjiro might use his sense of smell to detect hidden threats. Since his sense of smell is super - enhanced, he could sniff out any demons or traps in the way of saving Rengoku. For example, if there are demons disguised as allies, Tanjiro would be able to tell by their scent.
There were two ways to use it on the computer for the National K song. The first method was to download the client (the Windows version) from the official website, so that he could use the national karaoke song on the computer. The other method was to use the web version, click on the "login now" in the upper right corner of the official website, and then use the app version to scan the code to log in. The web version of the National K song supported the use of more powerful editing tools outside the station to generate high-quality works and upload them directly to the personal homepage. It was more professional and attracted more fans.