Product Overview

Pixa is a premium SwiftUI iOS application for AI-powered image generation. Users input text prompts, select visual styles, and generate high-fidelity images. The server layer is backed by Firebase (Auth, Firestore, Cloud Functions, Storage), in-app purchases and credit packages are managed via RevenueCat, and image generation is driven by fal.ai.

Technical Stack

• Frontend: Swift & SwiftUI (iOS 18.0+)
• Backend: TypeScript / Node.js 20 on Firebase Cloud Functions v2
• Database & Storage: Firebase Firestore & Firebase Storage
• Authentication: Firebase Authentication (Apple, Google, & Anonymous)
• AI Services: fal.ai API
• Monetization: RevenueCat SDK
• Image Downloading: Nuke

Libraries & Dependencies (Swift Package Manager)

• firebase-ios-sdk (Firebase Auth, Firestore, Cloud Functions, Storage)
• purchases-ios-spm (RevenueCat SDK)
• MorphModalKit (Fluid visual transitions and custom modals)
• swiftui-toasts (Dynamic popup toasts)
• GoogleSignIn-iOS (Google authentication)
• Glur (Visual blurs)
• Nuke (High-performance image caching)
• Alamofire (HTTP networking)

Core App Features

1. AI Image Generation

• Prompt Input: Generate images from text prompts.
• Style Presets: Select visual styles (Anime, Photo, 3D, Cyberpunk, etc.).
• fal.ai Integration: Securely calls fal.ai API via Firebase Functions.

2. Firestore Prompt History

• Image Gallery: Saves prompts and generated images to Cloud Firestore.
• Offline Sync: Displays history when offline.

3. RevenueCat Integration

• Subscription Offers: Standard paywalls verified via RevenueCat.
• Credit Packs: Purchase token packages to generate single images.

4. User Accounts

• Google & Apple Authentication: Secure logins.
• Anonymous Access: Let users test the app as guest before signing in.

5. Secure Backend

• Firebase Functions v2: TypeScript backend handles API keys.
• App Check support: Block malicious API scraping.