If you are using 
Torrent Pro app, then you don’t need to worry because the app developers have already provided many unique features. One of them is the default tracker option, which automatically updates a bunch of trackers daily by adding live trackers to increase the speed. This option is not available in other torrent clients. But if you want to add trackers by yourself, I will guide you .
Add trackers to an individual torrent file: To add trackers to a specific file, click on the torrent file that you want to modify. Then it will take you to the details page where you can find the add tracker option on the right side of the speedometer. By clicking on it, you can add trackers to any individual torrent file.
Add trackers to all downloading torrent files: To add trackers to every file that you want to downloading, you need to go to the settings menu and swipe down until you see the general section. In it, you will find the advanced features option. Click on it and then it will take to the advanced settings page where you can find the advanced pro section. In that section, you will find the default tracker option. Click on it and from there you can add trackers to all torrent files.