I haven't visited the forum for a long time, I haven't had time to work on the application. And the distribution of the application shows that those interested are mainly in Russia.
Let's answer each point.
1. At the time of the start of development, I decided not to implement all the miner management functions in the application. That is, you cannot change pools, disable/enable miners, or do anything else. All information about the application is collected exclusively through the API.
2. The data collected in the app represents the approximate location for displaying targeted ads. No other data is collected. Location data is transmitted to me solely to determine the target audience.
3. I totally agree about viruses. Yes, users will be treated with distrust in most cases. However, I already have a dozen rave reviews in which the app has helped and added convenience. The application is distributed free of charge, provided that ads are placed in the application. The right to use or not remains solely with the user.
4. I wonder what proven open source apps exist for the phone. Comparing a PC and a mobile app should not be done when it comes to mobility. All types of access from a phone to a PC are "crutches".
5. I do not understand what kind of payment is being discussed in the topic if the user does not pay for anything.
6. I developed this app because the convenience of quickly checking the farm status was a priority for me. Due to the sufficient remoteness of the objects, when an event comes from the server, it turned out to be most convenient for me to enable a vpn connection to the farm and check devices from my phone. If something can be fixed remotely, that's what was done. And you could do it while sitting in the car.
7. Currently, there are more than 700 active users. The average rating is 4.6. I consider this a good result for myself.
And really, thank You for your attention. It is important for me to hear the opinion of users. Even distrust of the application. Only time can prove that the application is completely harmless.