# Flipper Pro FAQ

> Common questions about Flipper Pro. Phone-home behavior, databases, license, upgrades, trials.

## Common questions

### Does it phone home?

No. Flipper Pro makes no outbound network calls. All flag data stays in your database.

### Can I use Flipper Pro without Flipper Cloud?

Yes. Flipper Pro is fully standalone. Cloud is a separate product with its own features and pricing.

### Does it work with my existing Flipper OSS setup?

Yes. Flipper Pro is a drop-in upgrade on top of your existing adapter and flag data.

### What Ruby and Rails versions are supported?

Flipper Pro requires Rails 6.1+ and Flipper 1.3+. It runs on any Ruby version those support. If you're on a recent Rails app with a recent Flipper, you're good. Pro requires Rails — non-Rails Ruby apps that use OSS Flipper aren't supported.

### What databases does it support?

Anything ActiveRecord supports: PostgreSQL, MySQL, SQLite.

### How do I upgrade from OSS?

Add the `flipper-pro` gem with the credential from your license email, run the migrations, and mount the engine. Full walkthrough on the [Installation page](/docs/pro/installation).

### Is there a free trial?

No free trial. If Flipper Pro doesn't function properly for you within two weeks of purchase, email us for a full refund. See [Pricing](/docs/pro/pricing) for details.

### How is Flipper Pro licensed?

Commercial, per-organization, non-transferable, non-redistributable. The OSS Flipper gem is MIT. Flipper Pro is not.

Full terms: the [EULA](/docs/pro/eula) shipped with the gem.

Short version: you can install Pro on any number of servers and environments under your control. You cannot redistribute the gem, embed it in a product you ship to third parties, or use it as the basis for a competing product.

### Can I ship Flipper Pro inside my SaaS product?

Not under the standard license. Email [support@flippercloud.io](mailto:support@flippercloud.io) for redistribution terms.