In film and advertising production, crews often spend days reshooting scenes or booking additional talent simply because a single casting choice no longer fits a revised brief or a new market.
Runway, which builds a cloud-based suite for generating and editing video, images, and audio with models such as Gen-4 and Gen-4.5, has released 'App Studio' to address parts of that friction.
The tool packages existing generative models into shareable applications.
Users describe a desired function in plain language, and the system produces an interface that can generate images, video, or audio while drawing on a workspace’s Brand Kits and prior workflows.
The release includes several example applications that show the approach.
One of those applications, Character Swap, accepts an uploaded video of up to 30 seconds and one or more photographs of a replacement person.
The interface lets a user specify whether the original audio should remain and then generates a draft version before a higher-resolution finalization. In the demonstration video, a woman walking past a pastel café is replaced by a man in a red jacket and cap; the camera path, background, and lighting stay the same while the new figure occupies the same physical space and continues the original motion.
A second example, Precise Edit, works on still images. After an image is dropped into the interface, the user draws rectangular boxes around individual regions and writes a short instruction for each box. In the shown sequence, boxes enclose a kitchen scale, a teapot, and an apple; the instructions request that the scale become a fruit tart, the teapot become a measuring cup, and the apple become half a lemon. Once the edits are applied, only the marked areas change; surrounding objects, lighting, and framing remain unaltered. The interface retains the original image alongside the edited version for comparison.
The third example, Table Read, operates on written dialogue. A user pastes or types a scene, assigns distinct speaker names, and selects voice parameters for each speaker, including stability, similarity to a reference, style exaggeration, and speaking rate. The system then synthesizes the lines in sequence. In the demonstration, a short exchange between two characters is played back with the chosen voices, and the interface allows the speech to be regenerated after adjustments to the settings. The output is an audio file that can be reviewed before any visual production begins.
These three applications sit inside a broader set of prebuilt tools that also includes character styling and product photography functions.
Users on paid Runway plans can open any of them as-is, remix an existing one, or describe an entirely new tool. Previously built Agent sessions and Workflows can be converted into an App Studio tool with a single action.
Each resulting application remains private until its creator chooses to share it with teammates, a workspace, or via a public link that requires a Runway account; generations on a shared link consume the visitor’s own credits.
Administrative controls already present in a workspace, such as disabled models, apply automatically to every application built inside it.
The announcement notes that early-access users, including architecture and film teams, constructed custom tools for tasks such as camera-path visualization and multi-market localization during the testing period.
App Studio is available on all paid plans and draws from the same credit balance used for ordinary generations. The code underlying each application remains visible for inspection, and earlier versions can be restored if a later revision is unwanted.
The release consolidates earlier prebuilt apps into the same interface, so existing tools continue to function without migration.
That convenience comes with clear limits.
Building and running applications consume the same credits as regular generations, and higher-end models such as Gen-4.5 or Seedance 2.5 remain costly enough that many users report burning through monthly allowances quickly, including on results they discard. There is currently no straightforward way to delete or fully unpublish an application; the practical step is to restrict its audience to the creator alone.
Among major laboratories, nothing matches the exact combination of plain-language packaging, brand kits, and team sharing for generative media. Adobe's Firefly suite comes closest.
In short, App Studio reduces the steps required to turn a repeated generative task into something teammates can run consistently. And this should come useful, especially for those already using Runway.
