ApsuleBuild once. Create many.

JSON UI + JavaScript logic, rendered as native SwiftUI on iPhone.

Read the architecture

Explore the Host API

Native SwiftUI

Apsule JSON maps to native SwiftUI components, with native Liquid Glass where supported.

Instant iteration

Push project deltas through Conductor and Relay instead of rebuilding an IPA for every UI or logic change.

Tool-neutral development

COS, Codex, the official Builder, third-party tools and humans can target the same Apsule Project contract.

JavaScript Runtime

Application logic uses JavaScript rather than a custom pseudo-Swift interpreter.

Host API

HTTP, BLE, location, storage, files, Keychain, media and other native features use one controlled bridge.

Versioned by design

Runtime discovery, explicit major migrations and backup-first validation let Apsule evolve without silently corrupting projects.

What is Apsule?

Apsule is a personal iOS runtime for rapidly creating and testing small native-feeling apps without producing a new IPA for every project change.

An Apsule Project contains JSON UI, JavaScript logic, assets and a manifest. The installed iPhone Host turns that description into native SwiftUI and provides native iOS functionality through the Host API.

Documentation

The pages in this site are the current Apsule design specification. Start with Architecture, then see Project Format, UI Components and Host API.

Terminology

Capability is reserved for Conductor. Native iOS functions available to Apsule JavaScript are called the Host API.