A software licence needs a unit: a device, an account, a person or another arrangement defined by the seller. Those words are not interchangeable. Read the actual licence description before moving software, sharing it or assuming one payment covers every screen you own.
The question is not how many devices could technically run the app. It is what the purchase actually permits and how that permission is administered.
Find the noun attached to the purchase
Look for the wording that defines the licensed unit and the edition covered. If it says device, ask how a replacement is handled under the developer’s rules. If it says account, establish which account and store relationship it means. Do not silently substitute the viewing-service username for a software-store account.
A hypothetical household might own three screens but buy software for only one specific platform edition. The hardware count alone does not explain entitlement. Likewise, a licence associated with a purchaser does not automatically establish that any other household member can manage or transfer it.
Ask about the change you actually need
Describe the proposed move precisely: replacement hardware, another compatible device under the same store account or a different operating-system edition. These changes can have different treatment. A general question about using it everywhere is less likely to produce a usable answer.
Google Play’s genuine reinstall guidance provides an example involving compatible devices and the purchasing account. It should not be broadened into a rule for every app, platform or direct licence system. For the actual product, retain the developer’s specific explanation where the store-level description leaves a question open.
Keep software permission separate from service use
Even where the player can be installed on several devices, the viewing service may have its own account conditions. Do not convert a software entitlement into an extra concurrent stream or a right to share service credentials. Ask the responsible party about the separate service arrangement.
The reverse is also important. A service account accepted on a device does not prove a paid software feature is licensed there. If an app presents a licence prompt, identify the actual product and purchasing route rather than asking service support to invent a software entitlement.
Save the licence explanation with the receipt
Keep the relevant wording, edition and purchase reference in a private record. If a transfer is approved, retain the actual confirmation and its conditions. Do not delete the original record just because the software now opens on the replacement device.
Before the next hardware change, review whether the explanation still concerns the same product. A newly named edition or platform purchase can require a fresh decision. The useful habit is to identify the licensed unit before paying, so the cost and the intended use remain connected from the beginning.
Useful answers
Does one licence always mean one device?
No universal meaning should be assumed. Read the unit and edition defined by the actual software purchase.
Does installing the app twice permit two service streams?
Not by itself. Software installation and service-account permissions are separate arrangements.