Blog

Engineering

How Reely is built.

Old coastal structures in foreground and a small lighthouse on a distant breakwater symbolizing outdated app demo videos and fresh previews.

Engineering

Why App Demo Videos Go Stale (and How to Regenerate Them)

App demo videos age faster than your release notes.

MacBook editing iOS simulator recording with export presets for App Store, X, and TikTok

Engineering

iOS Simulator Recording: Resolutions, Frame Rates, and App Store Specs (Plus X & TikTok)

If you ship iOS features fast, your bottleneck is usually not code, it's getting clean app preview videos out of the simulator and into App Store, X, and…

Mac developer recording an iOS app with Kap while generating an AI-powered launch video

Engineering

AI Launch Video Tools for Agent-First Workflows: How to Record Clean App Demos with Kap

Short-form launch videos are now table stakes for mobile apps. But if you’re building in an agent-first workflow, you need a capture layer that’s fast, clean…

SwiftUI developer using ScreenCaptureKit on macOS to record iOS Simulator app demo footage for launch video

Engineering

Build a ScreenCaptureKit Recorder for the iOS Simulator

SwiftUI developers are shipping features faster than ever. But turning those features into crisp, launch‑ready app demo videos still feels like a separate job.