Thank you PrimeTestLab!
I created an app all by myself with no team and not enough Android user acquaintances. I was desperately looking for people to test it in real life so I could publish it, and that's when I discovered primetestlab.com. The process was smooth; the instructions were very well explained for starting testing after registration. I could see the testers joining the process and starting to use my app. They completed the required 14-day testing period. A report was created with their feedback, including bugs and errors, and very shortly my app was approved and is now available on the Play Store. I was worried while signing up, wondering whether the testers would be active and complete the process, but I didn't have a single issue. All teamless developers seeking testers, like myself, can confidently use primetestlab.com; this is a genuine comment. Trust me, they do test your app. Thank you so much, guys!