[Zubersoft]

If you purchase MobileSheets through one of the major app stores (Google Play, Microsoft Store, Apple App Store), then you can install that version on each device you own running the same platform (Android, Windows, iPadOS). This is only for personal use however (i.e. groups should be purchasing licenses through my FastSpring store so that each individual user is licensed). If you want to install it on an Android tablet and a laptop, for instance, then you would need to purchase twice (once through Google Play, and once through the Microsoft Store). 

Mike