Reely Turns App Screens Into Launch Videos

A mobile developer can finish a feature in an afternoon and still spend the next day trying to show it properly. The app needs a clean screen recording, a sensible sequence, captions, music, device framing and a video that does not look like an unedited simulator capture. For a solo developer, that marketing work can become a second production job.

Reely is built around removing that job. It uses an AI agent to turn screenshots, an existing screen recording or, for some SwiftUI projects, a reconstructed interface into an app launch video. The useful distinction is that it aims to handle the production process, not just provide a place to arrange clips.

The problem Reely is trying to solve

The usual starting point for an app demo video is footage. That means preparing the app, loading suitable data, finding a clean path through the interface, recording it without mistakes and then editing around the result. A feature that is still in development makes the process harder. The right state may not exist, and a backend may not be ready to produce convincing content.

Reely’s approach is to let the developer describe the flow they want to show. The agent turns that description into an editable plan, then works from whatever material is available. A screenshot can become the basis for a motion-led video. A recording can be placed inside a designed device presentation. With no footage, the tool says it can rebuild a working mock of a feature, populate it with chosen content, run it in the iOS Simulator and film that run.

That last route is the most distinctive part of the product, but also the one that needs the most careful interpretation. The result is not the shipping app binary. It is a reconstruction intended for the video. That can be useful when the goal is to show a polished feature state, a particular locale or data that is not available in production. It also means the final video should not be treated as proof that the exact interface exists in the released app.

How the workflow is meant to work

The process starts with an instruction rather than a timeline. Reely says the agent creates the scene structure, captions, transitions, camera movement, device choreography and music cues. The developer can then request changes through the agent instead of manually moving layers and trimming clips.

There is a practical reason for the tool’s interaction-sync feature. When Reely builds and drives the mock interface, it knows when each tap occurs. It records those interaction marks and uses them to place cuts, camera moves and captions against the action. This is different from guessing where a tap happened after the recording has already been made.

The project is stored as a declarative specification rather than only as a rendered movie. Reely says that lets the developer regenerate the video after changing the interface. That could be valuable for a product that changes frequently, although regeneration is only useful if the rebuilt screen still matches the app closely enough for the intended audience.

The app supports two broad kinds of output. A short feature teaser can focus on one product moment. A longer launch promo can combine product footage with titles, transitions, music and a wider story. The landing page also describes kinetic typography, device motion, app-matched themes, different aspect ratios and sound cues as part of the editor.

What it supports, and what it assumes

Screenshots and screen recordings are the broadest inputs. Reely says those routes work with mobile apps built using SwiftUI, React Native, Expo or Flutter because the source material is already captured. This makes the tool more relevant to developers who want a styled video around their real interface without changing their app stack.

The deeper rebuild and film workflow is aimed at SwiftUI. It can read SwiftUI source to better match structure and design tokens, but it does not modify the project. The build-and-film route runs the iOS Simulator locally and therefore requires Xcode. The app itself is macOS only, and the developer says rendering happens on the Mac rather than through a cloud upload.

Those constraints matter. A Windows developer cannot use the application as listed, and a non-SwiftUI developer cannot use the most ambitious route. Anyone relying on a real, production-authentic screen should bring a recording instead of assuming that a generated reconstruction is interchangeable with the app they ship.

There is another qualification for anyone thinking about an App Store preview video. Reely explicitly says its output is not automatically compliant with Apple’s current preview requirements. The export needs to be checked against the relevant footage, duration, frame-rate, codec and device rules. In other words, this is primarily a marketing video generator, not a guarantee that an export can be submitted unchanged.

Who Reely makes sense for

Reely is aimed at solo mobile developers who ship faster than they market, and the workflow matches that audience. It is most useful when the bottleneck is not knowing what the app does, but turning that knowledge into a coherent visual presentation. A developer with screenshots can start there. One with a recording can preserve the real app. A SwiftUI developer with an unfinished or awkward demo state can explore the reconstruction route.

The product has a free plan with a paid upgrade. Creating projects is free, while exporting the finished video requires the upgrade. That arrangement lets a developer test the workflow and revise a project before committing to an export, but it does not make finished deliverables entirely free.

This is a poor fit if you need a Windows tool, a conventional editor for many unrelated video projects, or certainty that generated footage represents the released application. It is more credible as a focused production layer for a solo developer who has an app to promote, limited time for editing and a clear feature flow worth showing.