However, Spectragryph also has some limitations:
If your trial period expires, you can contact the author to request a permanent free license key for non-commercial purposes. 2. Lifetime Academic/Commercial Licenses For professional or institutional use, Spectragryph offers lifetime licenses with no recurring costs. Academic Distribution: Approximately €500 per institution. Commercial Use: Approximately €290 per user. Note on Licensing: Recent user reports on ResearchGate