Templates: four different tools

App Templates, Service Catalog, App Store, and Compose Templates are not the same thing.

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#Which to use

Tool	What it holds	What it does
App Templates	5 hardcoded structs (nginx, node/git, python/git, postgres-compose, redis).	Prefill the app creation wizard. No versions, no install records.
Service Catalog	DB rows for databases, caches, queues.	Provisions managed infrastructure with instances, attach links, retention.
App Store	DB rows with compose content, params schema, version.	Installs versioned user apps, tracks installs, upgrades, uninstalls.
Compose Templates	Admin-saved parameterized stacks with ${KEY} rendering.	Preview, instantiate to a live stack.

#Rule of thumb

Prefill a form → App Templates. Provision infrastructure (a database) → Service Catalog. Install a versioned app → App Store. Reuse a parameterized stack → Compose Templates. They share no storage and no install records.