question

In order for your app to run on one of our production devices, it must be downloaded through our Clover App Market and therefore go through the full app submission process. It's important to note that our App Market only supports public apps–private apps are not supported. If your app could be useful to other golf merchants, it may be a good fit. You can specify supported devices: Station, Mini, Mobile, and Flex.

You can also purchase a Clover DevKit for development and testing. These devices support sideloading apps, but are only functional in our sandbox environment.

There are certain limitation on our devices, like Google Play Services not being available, but for the most part, it will run Android apps within the restriction of the device (eg. API level). It will also need to be published through our App Market as a public app.
https://docs.clover.com/launch/launch-overview/

API levels of each device:
4.2.2 (API 17) to emulate Clover Station, 4.4.4 (API 19) to emulate Clover Mini/Mobile, and Android 5.1.1 (API 22) to emulate Clover Flex.

What you are describing is a full-integration with our devices, where you run your software directly on our devices. You can run your POS as an app on top of our Clover OS, or there is a more deeply integrated option of rebuilding closer to the engine. All our devices are capable of running full-integration.
https://www.clover.com/integrations#full-integrati...

My suggestion would be to signup as a developer on our sandbox environment ( sandbox.dev.clover.com) then read through some of our documentations:
https://docs.clover.com/build/android-apps/
You will need to do some additional work if you want to connect your app to our card reader / payment processing. We also provide devpay, which is very similar to Stripe.
https://docs.clover.com/build/developer-pay-api/
Processing will need to go through our gates.

https://github.com/clover/clover-android-sdk
https://github.com/clover/android-examples

The other option is Semi-integration, which you would bring your own Android device with your software and connect with Clover's strictly for customer facing payment terminal. For that, I would suggest email semi-integrations@clover.com
https://www.clover.com/integrations#semi-integrate
(only supported by Mini and Mobile at the moment)

For testing, you can load your app on our devkit devices, which you can get here:
https://cloverdevkit.com/
or you can do your initial tests on an emulator:
https://docs.clover.com/build/android-emulator-set...