Firebase is the superior choice for mobile-first apps and rapid prototyping due to its mature, built-in features.

Built-in Offline Persistence: Firestore and Realtime Database provide comprehensive, out-of-the-box offline support that caches data on the client device. It automatically handles local reads, writes, and re-syncing when the connection returns.

Seamless Real-time Sync: Its "battle-tested" real-time engine is more flexible, syncing nearly any data change beyond just database updates.

Google Ecosystem: Deep integration with Google Analytics, Cloud Messaging (push notifications), and ML Kit makes it a "one-stop-shop" for mobile developers.

Deep integration with Google Analytics, Cloud Messaging (push notifications), and ML Kit makes it a "one-stop-shop" for mobile developers.

import JavaScriptCore

func runJavaScriptExample() {
    // 1. Create a JavaScript execution context
    let context = JSContext()!

    // 2. Define a simple JavaScript function as a string
    let script = """
    function multiply(a, b) {
        return a * b;
    } 
}

Ease of Setup: It requires virtually no upfront data schema design, allowing for faster initial development.

When Supabase is Better