Is Apache License Free?
You can use any Apache License 2.0 licensed software in your commercial products for free. However, you must not name your product in a way that it looks like an endorsement from Apache.
To apply the license to your software project, create a LICENSE file in the source tree's top level. Now copy the full Apache 2.0 License text from https://www.apache.org/licenses/LICENSE-2.0.txt into a LICENSE file. Notice that the LICENSE file doesn't have any extension, but you can optionally name the file LICENSE.
How to apply the Apache 2.0 License to your Open Source software project
Is Apache GPL license?
The Apache Software Foundation and the Free Software Foundation agree that the Apache License 2.0 is a free software license, compatible with the GNU General Public License (GPL) version 3, meaning that code under GPLv3 and Apache License 2.0 can be combined, as long as the resulting software is licensed under the ...
Apache License - Wikipedia
Open-source licensed software is mostly available free of charge, though this does not necessarily have to be the case. Licenses which only permit non-commercial redistribution or modification of the source code for personal use only are generally not considered as open-source licenses.
Open-source license - Wikipedia
What is the difference between MIT license and Apache License?
MIT gives you only a copyright license. For Apache, you have to carry the license with you whenever you distribute it, and modified files must also have prominent notices that the files have been changed, and third, giving proper credit to the authors, and they include not just copyright, but patent and trademarks.
What's the difference between Apache v2.0 and MIT license ... - Quora