Hi, I'm Vasyl. I've been creating mobile apps for twenty years, since the Symbian days. A lot has changed since then, but most apps still work the same way for everybody who installs them. If an app lacks the thing you need, you live with that or go looking for another.

Once AI became capable of building software from plain words, and the result, especially web pages, became usable almost instantly - I thought it would be good to have the same for mobile apps, with features appearing on demand, without a new release. So I created StemJSON.

It's a declarative format based on well-known and widely used JSON. AI knows JSON well and can generate it reliably. StemJSON describes a whole functional feature, with its UI and logic. A user can ask for a new feature right inside an app, and AI generates it. A feature can also be sent from a backend using the classic server-driven UI (SDUI) approach, with the logic included. The StemJSON runtime, added to the app by its developer, checks the feature and renders it natively on iOS or Android, within limits the developer set. So mobile apps can become self-adjusting and personalized.

To try it, use StemStudio AI, the first mobile IDE for StemJSON. It runs on iPhone, iPad or Mac. It's free and needs no account. To generate a feature, your own AI API key (OpenAI or Anthropic) is required, but you can also try already generated StemJSON projects by importing them from the catalog: https://stemjson.com/catalog

StemJSON

Let users add features to apps with AI

Let users add features to apps with AI