Free use and optional Supporter
The full End User License Agreement is in the LICENSE file beside the application and at the MOptima source repository. This chapter summarizes the product; the EULA controls software use.
Free
All desktop features are available without an account, key, payment, or internet connection. This includes 3D editing, MMFF and xTB workflows, MO Viewer, QM and Batch workflows, imports, exports, projects, and reports. There are no paid atom or result-tab quotas. Real chemistry, memory, input-format, and workflow limits still apply.
Free is for individual users, including independent teaching, research, and professional or commercial work. Use by or on behalf of a team, laboratory, company, or other organization requires a separate Group license. Free and Supporter users receive the same public stable releases.
Supporter
Supporter is an optional one-time purchase for individual users. It removes occasional support reminders and enables a hideable identity indicator. It does not unlock computation, expand Individual Use rights, or promise permanent online services or individual support. It does not have a one-year update limit. See the Download page for the current checkout amount and availability.
The identity can be active on one device at a time. Use About > Support MOptima > Activate Supporter... to enter your key, Supporter Status... to check it, and Deactivate Supporter... before moving to another computer. Activation, validation, and deactivation run in the background. A valid saved identity remains visible offline; failed network requests do not affect software features. A confirmed refund or revocation removes the identity at the next online check.
If a Supporter key or service is unavailable, MOptima still operates fully as Free. Contact support through the Download page for payment or refund questions. Applicable consumer rights remain in effect.
Group
Industrial, team, laboratory, and organization-wide use requires a separate written Group license before use. To arrange a purchase, email support@m-optima.com. Group terms and pricing are agreed directly; there is no Group checkout on the website.
Updates
Use About > Check for Updates... at any time. Automatic stable-release checks are on by default and can be turned off in the same menu. At most one automatic check runs every 24 hours; network failures do not interrupt startup or calculations. Update notices link to official release notes and downloads. MOptima never installs an update automatically.
Update requests reveal ordinary network metadata such as IP address, along with app version and platform. They do not upload molecules, projects, or usage history. See the Privacy Policy.