LICENSE

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║                                                                                ║
║                         GRAVITYMON — DUAL LICENSE                              ║
║                                                                                ║
║         Open Source Use  →  GNU General Public License v3.0 (GPL v3)           ║
║         Commercial Use   →  Commercial License Agreement (see below)           ║
║                                                                                ║
╚════════════════════════════════════════════════════════════════════════════════╝

Copyright (c) 2021-2026 Magnus
Source: https://github.com/mp-se/gravitymon and https://github.com/mp-se/gravitymon-ui

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CHOOSING YOUR LICENSE

This software is available under two separate licenses. You must choose the one
that applies to your use case:

  ┌─────────────────────────────────────────────────────────────────────────┐
  │  LICENSE A — GPL v3 (Open Source)                                       │
  │                                                                         │
  │  Use this license if you:                                               │
  │    • Use, study, or modify the software for personal/non-commercial use │
  │    • Distribute the software and ALL your modifications as open source  │
  │      under GPL v3                                                       │
  │    • Are an individual hobbyist selling ≤ 100 units per calendar year   │
  │      (see Hobbyist Safe Harbor below)                                   │
  │                                                                         │
  │  Obligation: You MUST publish your full source code under GPL v3.       │
  └─────────────────────────────────────────────────────────────────────────┘

  ┌─────────────────────────────────────────────────────────────────────────┐
  │  LICENSE B — Commercial License                                         │
  │                                                                         │
  │  You MUST obtain a Commercial License if you:                           │
  │    • Distribute this software in a product without releasing your       │
  │      source code under GPL v3 (i.e. you want to keep your code closed)  │
  │    • Are a company or business entity distributing any quantity         │
  │    • Are an individual distributing > 100 units per calendar year       │
  │    • Sell on marketplaces (AliExpress, Amazon, eBay, etc.)              │
  │                                                                         │
  │  Contact: mpersson42(at)gmail.com                                       │
  └─────────────────────────────────────────────────────────────────────────┘

────────────────────────────────────────────────────────────────────────────────

HOBBYIST SAFE HARBOR

To support the maker community, individual hobbyists may distribute this
software in pre-assembled hardware products WITHOUT a Commercial License,
provided ALL of the following conditions are met:

  1. You are an individual person, not a company or business entity
  2. Total units distributed do not exceed 100 per calendar year
  3. You publish the full source code of your version under GPL v3
  4. You include a visible link to the original repository:
     https://github.com/mp-se/gravitymon
  5. All original copyright notices remain intact in source and UI

  Exceeding any of these conditions voids this exception and requires
  a Commercial License.

────────────────────────────────────────────────────────────────────────────────

ATTRIBUTION (required under both licenses)

  • All "Copyright (c) Magnus" notices must remain intact
  • Include notices in source code, documentation, and any "About" or
    "System Info" screens in the software UI

────────────────────────────────────────────────────────────────────────────────
────────────────────────────────────────────────────────────────────────────────

                     GNU GENERAL PUBLIC LICENSE (LICENSE A)

────────────────────────────────────────────────────────────────────────────────
────────────────────────────────────────────────────────────────────────────────

GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007

Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>

Everyone is permitted to copy and distribute verbatim copies of this license
document, but changing it is not allowed.

                                 PREAMBLE

The GNU General Public License is a free, copyleft license for software and
other kinds of works.

The licenses for most software and other practical works are designed to take
away your freedom to share and change the works. By contrast, the GNU General
Public License is intended to guarantee your freedom to share and change all
versions of a program--to make sure it remains free software for all its users.
We, the Free Software Foundation, use the GNU General Public License for most of
our software; it applies also to any other work released this way by its authors.
You can apply it to your programs, too.

When we speak of free software, we are referring to freedom, not price. Our
General Public Licenses are designed to make sure that you have the freedom to
distribute copies of free software (and charge for them if you wish), that you
receive source code or can get it if you want it, that you can change the
software or use pieces of it in new free programs, and that you know you can do
these things.

To protect your rights, we need to prevent others from denying you these rights
or asking you to surrender the rights. Therefore, you have certain
responsibilities if you distribute copies of the software, or if you modify it:
responsibilities to respect the freedom of others.

For example, if you distribute copies of such a program, whether gratis or for a
fee, you must pass on to the recipients the same freedoms that you received. You
must make sure that they, too, receive or can get the source code. And you must
show them these terms so they know their rights.

Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License giving you
legal permission to copy, distribute and/or modify it.

For the developers' and authors' protection, the GPL clearly explains that
there is no warranty for this free software. For both users' and authors' sake,
the GPL requires that modified versions be marked as changed, so that their
problems will not be attributed erroneously to authors of previous versions.

Some devices are designed to deny users access to install or run modified
versions of the software inside them, although the manufacturer can do so. This
is fundamentally incompatible with the aim of protecting users' freedom to
change the software. The systematic pattern of such abuse occurs in the area of
products for individuals to use, which is precisely where it is most
unacceptable. Therefore, we have designed this version of the GPL to prohibit the
practice for those products. If such problems arise substantially in other
domains, we stand ready to extend this provision to those domains in future
versions of the GPL, as needed to protect the freedom of users.

Finally, every program is threatened constantly by software patents. States
should not allow patents to restrict development and use of software on
general-purpose computers, but in those that do, we wish to avoid the special
danger that patents applied to a free program could make it effectively
proprietary. To prevent this, the GPL assures that patents cannot be used to
render the program non-free.

The precise terms and conditions for copying, distribution and modification
follow.

                         TERMS AND CONDITIONS

 0. Definitions.

  "This License" refers to version 3 of the GNU General Public License.

  "Copyright" also means copyright-like laws that apply to other kinds of works,
  such as semiconductor masks.

  "The Program" refers to any copyrightable work licensed under this License.
  Each licensee is addressed as "you". "Licensees" and "recipients" may be
  individuals or organizations.

  To "modify" a work means to copy from or adapt all or part of the work in a
  fashion requiring copyright permission, other than the making of an exact copy.
  The resulting work is called a "modified version" of the earlier work or a
  work "based on" the earlier work.

  A "covered work" means either the unmodified Program or a work based on the
  Program.

  To "propagate" a work means to do anything with it that produces directly or
  secondarily liable for infringement under applicable copyright law, except
  executing it on a computer or modifying a private copy. Propagation includes
  copying, distribution (with or without modification), making available to the
  public, and in some countries other activities as well.

  To "convey" a work means any kind of propagation that enables other parties to
  receive copies. Mere interaction with a user through a computer network, with
  no transfer of a copy, is not conveying.

  An interactive user interface displays "Appropriate Legal Notices" to the
  extent that it includes a convenient and prominently visible feature that
  (1) displays an appropriate copyright notice, and (2) tells the user that
  there is no warranty for the work (except to the extent that warranties are
  provided), that licensees may convey the work under this License, and how to
  view a copy of this License. If the interface presents a list of user commands
  or options, such as a menu, a prominent item in the list meets this criterion.

 1. Source Code.

  The "source code" for a work means the preferred form of the work for making
  modifications to it. "Object code" means any non-source form of a work.

  A "Standard Interface" means an interface that either is an official standard
  defined by a recognized standards body, or, in the case of interfaces
  specified for a particular programming language, one that is widely used among
  developers working in that language.

For full GPL v3 terms, see: https://www.gnu.org/licenses/gpl-3.0.en.html

────────────────────────────────────────────────────────────────────────────────
────────────────────────────────────────────────────────────────────────────────

                          COMMERCIAL LICENSE (LICENSE B)

────────────────────────────────────────────────────────────────────────────────
────────────────────────────────────────────────────────────────────────────────

COMMERCIAL LICENSE AGREEMENT

This Commercial License governs the use of GravityMon software by parties who
do not wish to comply with the obligations of the GNU General Public License
v3.0 (GPL v3) — primarily the requirement to publish your full source code.

OVERVIEW

This license is granted by Magnus ("Licensor") to the purchasing entity
("Licensee") upon execution of a written agreement and payment of the
applicable license fee.

WHAT THE COMMERCIAL LICENSE GRANTS

Upon execution of a written agreement with the Licensor, the Licensee receives:

  ✓ The right to incorporate GravityMon into proprietary, closed-source
    products without triggering GPL v3 source disclosure obligations

  ✓ The right to distribute such products commercially without quantity limits

  ✓ The right to modify GravityMon without publishing those modifications

  ✓ A royalty-free license for the agreed scope/term as defined in the
    signed agreement

REQUIREMENTS UNDER COMMERCIAL LICENSE

Regardless of the license tier, the Licensee must:

  1. Retain all "Copyright (c) Magnus" notices in source code and
     documentation

  2. Display a copyright notice in any "About", "System Info", or
     equivalent screen in the product UI:
         "Portions copyright (c) Magnus — https://github.com/mp-se/gravitymon"

  3. Not sublicense, resell, or transfer the Commercial License rights
     to any third party without prior written consent from the Licensor

  4. Not misrepresent the origin of the software or remove attribution

NO WARRANTY

THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
LICENSOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY ARISING FROM
THE USE OF THIS SOFTWARE.

HOW TO OBTAIN A COMMERCIAL LICENSE

To inquire about commercial licensing terms and pricing, contact:

  Name:    Magnus
  Email:   mpersson42(at)gmail.com
  GitHub:  https://github.com/mp-se

Please include in your inquiry:
  • Intended use / product description
  • Estimated annual distribution volume
  • Whether you are an individual or business entity

VIOLATION & ENFORCEMENT

Unauthorized commercial use without a valid Commercial License constitutes:

  • A breach of copyright under applicable law
  • A violation of the GPL v3 (if GPL terms are also not met)

The Licensor reserves the right to pursue all available legal remedies
including injunctive relief and damages for unauthorized commercial use.