Iron Harvest uses Unity Analytics. If you care about these things you can't opt out through the game (unless you have the protection of the GDPR).

You may not care about these things. Feel free to move on.

If you would like to minimize this information you'll need to edit C:\Users\<Username>\AppData\LocalLow\KingArt\IronHarvest\Unity\<GUID>\Analytics\config.

<Username> is your username on the system you're logged into.
<GUID> is a large series of letters and numbers. I'm not sure if this changes between installs.

Open the config file with Notepad or your favorite text editor and change: analytics enabled to false, limit_user_tracking to true, player_opted_out to true, enabled (after opted out) to false, coreBusinessMetrics enabled to false, and analytics shouldCollectionAutomation to false.

My file looks like this - changes are in bold.

{
   "analytics" : { "enabled" : false },
   "connect" :
   {
      "limit_user_tracking" : true,
      "player_opted_out" : true,
      "enabled" : false
   },
   "performance" : { "enabled" : false },
   "dynamic" :
   {
      "coreBusinessMetrics":
      {
         "enabled" : false,
         "timeToWaitForUserInfoS" : 60
      },
      "analytics" :
      {
         "shouldCollectAutomation" : false,
         "timeToWaitForUserInfoS" : 60
      }
   }
}

Save the file and open its properties and change it to Read Only.

What we're doing here is leveraging the Unity support for GDPR opt out.

Changing the above doesn't affect your ability to progress or earn in game rewards. That does also send information to KING Art. If you're worried about blocking at that level I'd recommend blocking the executable using the Windows Firewall or NetLimiter or a similar utility.