Rust Starter Support
Contact
Email ministep@dozen.network. Include the app version/build, device and OS, reproduction steps and full error message. Remove passwords, keys, personal information and unrelated source code. Provider: Dozen Network Technology Co., Ltd.
The first compilation takes time
The app loads its bundled compiler and standard library on first use. Status messages describe preparation, compilation and execution. You can stop an operation. If the runtime process fails, retry; your saved source remains separate from the runtime.
Input and supported projects
Set input before running; it ends at EOF. Cargo, downloaded crates, HTTP clients/servers, threads and native dependencies are not supported. Describing external libraries in Explore does not install them in the app.
Where program files are saved
The program uses a virtual filesystem. Relative paths and /workspace refer to project data, persisted in the project’s Data folder after execution returns and validation succeeds. Stop, timeout or a crashed runtime do not save unfinished changes. Source files are edited through the app. Duplicating a project copies source/input, not generated Data files.
Projects and purchases
Free users can edit the default workspace. IDE Pro unlocks multiple local projects and duplication. Restore Purchases uses the same Apple Account; eligible Family Sharing transactions also qualify. A refund or revoked shared access can make other projects read-only without deleting their source. Restore Purchases does not recover deleted projects or learning progress. Apple handles payments and refunds.
Workspaces and backups
Settings → Project Workspace manages locations. Mac users can authorize a folder; iPhone/iPad users can enable Files access. Opening another workspace does not merge projects. Removing the iPhone/iPad app also deletes its Documents workspace. The app does not provide iCloud sync or backup. Back up the whole project, including metadata and Data, before removing the app or changing storage.
Offline use
The compiler, basic course, reference, guides and Explore content are bundled. Editing, execution and local learning work offline. StoreKit purchases/restoration, current activity, remote images and online support pages need a connection. Missing activity never blocks editing or learning.