The following information was obtained directly from the Apple Store Terms and Conditions page. For further information: https://www.apple.com/legal/internet-services/itunes/us/terms.html
Except as otherwise set forth herein,
(i) If you are an individual acting in your personal capacity, you may download and use an application from the Mac App Store (“Mac App Store Product”) for personal, non-commercial use on any Apple-branded products running Mac OS X (“Mac Computer”) that you own or control.
(ii) If you are a commercial enterprise or educational institution, you may download a Mac App Store Product for use by either (a) a single individual on each of the Mac Computer(s) used by that individual that you own or control or (b) multiple individuals on a single shared Mac Computer that you own or control. For example, a single employee may use a Mac App Store Product on both the employee’s desktop Mac Computer and laptop Mac Computer, or multiple students may serially use a Mac App Store Product on a single Mac Computer located at a resource center or library. For the sake of clarity, each Mac Computer used serially by multiple users requires a separate license.
(iii) Use may require sign-in with the Apple ID used to download the Mac App Store Product from the Mac App Store. Mac App Store Products can be updated through the Mac App Store only.
APP STORE PRODUCT USAGE RULES
(i) If you are an individual acting in your personal capacity, you may download and sync an App Store Product for personal, noncommercial use on any iOS Device you own or control.
(ii) If you are a commercial enterprise or educational institution, you may download and sync an App Store Product for use by either (a) a single individual on one or more iOS Devices used by that individual that you own or control or (b) multiple individuals, on a single shared iOS Device you own or control. For example, a single employee may use an App Store Product on both the employee's iPhone and iPad, or multiple students may serially use an App Store Product on a single iPad located at a resource center or library. For the sake of clarity, each iOS Device used serially by multiple users requires a separate license."
a. Scope of License: This license granted to you for the Licensed Application by Licensor is limited to a nontransferable license to use the Licensed Application on any Apple-branded products running iOS (including but not limited to iPad, iPhone, and iPod touch) (“iOS Devices”) or Mac OS X (“Mac Computers”), as applicable (collectively, “Apple Device(s)”) that you own or control and as permitted by the usage rules set forth in the Mac App Store, App Store and iBooks Store Terms and Conditions (the “Usage Rules”). This license does not allow you to use the Licensed Application on any Apple Device that you do not own or control, and except as provided in the Usage Rules, you may not distribute or make the Licensed Application available over a network where it could be used by multiple devices at the same time. You may not rent, lease, lend, sell, transfer redistribute, or sublicense the Licensed Application and, if you sell your Mac Computer or iOS Device to a third party, you must remove the Licensed Application from the Mac Computer or iOS Device before doing so. You may not copy (except as expressly permitted by this license and the Usage Rules), decompile, reverse-engineer, disassemble, attempt to derive the source code of, modify, or create derivative works of the Licensed Application, any updates, or any part thereof (except as and only to the extent that any foregoing restriction is prohibited by applicable law or to the extent as may be permitted by the licensing terms governing use of any open-sourced components included with the Licensed Application). Any attempt to do so is a violation of the rights of the Licensor and its licensors. If you breach this restriction, you may be subject to prosecution and damages."