---
epic: 15
story: 15.2
title: "Pro Tier"
status: draft
---

## Epic 15 — Monetization & Onboarding
**Goal:** Establish sustainable revenue with a generous free tier and frictionless onboarding.

### Story 15.2: Pro Tier

As a CalcPad Pro subscriber,
I want access to advanced features including unlimited sheets, cloud sync, and collaboration,
So that I can use CalcPad as my primary professional calculation tool.

**Acceptance Criteria:**

**Given** a user has an active Pro subscription or one-time Pro purchase
**When** they use the application
**Then** they can create unlimited sheets with no cap
**And** cloud sync is enabled across all their devices
**And** all themes including premium themes are available
**And** custom theme creation is unlocked

**Given** a Pro user
**When** they access currency and financial features
**Then** historical currency rates are available for past-date conversions
**And** stock/ticker lookups are available for real-time financial data

**Given** a Pro user
**When** they use collaboration features
**Then** they can share sheets with other users for real-time collaborative editing
**And** they can set view-only or edit permissions on shared sheets

**Given** a Pro user
**When** they export a sheet
**Then** all export formats are available: plain text, Markdown, PDF, and HTML
**And** exported PDFs include formatted results with proper typography

**Given** a Pro user
**When** they access developer features
**Then** CLI access to calcpad-engine is available for scripting and automation
**And** API access is available for programmatic sheet evaluation
**And** the plugin system is available for extending CalcPad with custom functions

**Given** a Pro subscription expires or is cancelled
**When** the user continues using CalcPad
**Then** sheets beyond the 10-sheet limit become read-only (not deleted)
**And** cloud-synced data remains accessible locally
**And** Pro-only features are gracefully disabled with clear upgrade prompts