SCADAR.NET is designed to provide audit features free of charge, so NO, any user account is classified as an 'AUDITOR' account and it can be used continuously, free of charge.
As SCADAR.NET has developed, we've placed additional emphasis on delivering enhanced features and functions that benefit the AUDITOR as a 'CONSULTANT'. For example, helping to define future compressor selection. In addition, many users have asked us to preserve data for longer periods of time etc. We deliver enhanced features by offering a subscription service. 'AUDITOR' accounts can be upgraded to 'CONSULTANT' accounts at any time to take advantage of CONSULTANT features.
The current 'CONSULTANT' subscription fee is 395€ per annum and can be purchased online.