The app is already downloaded to your phone, to dive into the Museum of Moscow's Subconsciousness follow the instructions below

• If when you open the file you get a popup with a request to give you permission to install the application - give it, if not - see the below steps

Steps for new phones:

1. Go to your Android Settings > Apps & Notifications
2. Select Advanced or the three dots at the top-right corner – users might see either option depending on their device
3. Select Special App Access
4. Choose Install Unknown Apps
5. Select the apps you want to allow to sideload apk files

Steps for old phones:

1. Go to your Android Settings > Security
2. Check the option Unknown sources
3. Tap OK on the prompt message
4. Select Trust