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.
One common theme is family loyalty. Given the strong bond within the Kamado family in the original story, this is often explored further in fanfiction. Another theme could be redemption, especially when it comes to Nezuko's situation as a demon. Writers might also focus on the theme of survival, as the family has to deal with the constant threat of demons.
Demon Kamado family fanfiction can be really exciting. It could focus on the untold stories of the Kamado family. Maybe there are stories about their ancestors and how certain family traits were passed down. Some fanfictions might also create alternate universes where the family has different powers or face different types of demons. It gives fans a chance to expand on the original story and get creative with the characters and their relationships.
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.