Very simple and easy-to-use app. Excellent to monitor your NIceHash workers, check your balance and stats. Just enter your account on nicehash.com, choose "Settings" and select "API-interface" from the left column.
Find and enter you API ID and API key into app settings, also enter your Bitcoin wallet address. Select your workers' algo from the bottom menu - and watch them working online!
Account online check is implemented. If you will enter wrong or not existing credentials, app will warn you and ask to correct them.
Feel free to ask any questions or send suggestions. New features will be added, new possibilities will appear. Have a nice MINING!