SimShelf

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An iOS Simulator data inspector for macOS

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Questions people actually ask

Does SimShelf change my app’s data?

No. Version 1.0 is fully read-only — it never writes to a source file, a timestamp, or a byte. Databases open with SQLite’s own read-only guarantees, or from a private copy inside SimShelf’s sandbox. There is no delete or reset function, because there is no write path.

Can it open a database Simulator is still writing to?

Yes. SimShelf reads the file header first and picks the correct, non-destructive path, so opening a database with a live -wal file cannot corrupt it. When it works from a snapshot rather than the live file, the window tells you so.

Why can’t I open my physical iPhone?

SimShelf inspects the iOS Simulator only. It does not read physical devices, does not call simctl, and does not launch or control Simulator processes — it reads what is already on disk for the device and app you select.

Can it compare two captures?

Not in version 1.0 — SimShelf inspects one source at a time. Comparing captures is planned for a later release.

My search found only a few results — is that everything?

Search reaches filenames, paths, decoded plists and JSON, and plain text. When a file’s contents can’t be searched, SimShelf says so explicitly, so an empty or short result is never quietly mistaken for “nothing’s there.”

What is a .simshelf snapshot?

A single ZIP file you export to share a capture — it survives a Jira ticket, a Slack message or an email the way a loose folder does not. It carries a manifest with SHA-256 hashes of everything inside, so a teammate can trust it is exactly what was captured. Because it faithfully copies what your app saved, a snapshot may contain tokens or customer data; SimShelf reminds you before every export. It does not scan for secrets.

A value shows as raw bytes or a hex dump

Binary sidecars and unknown files open in a byte-accurate hex view. NSKeyedArchiver blobs (common in UserDefaults and Core Data metadata) decode into a browsable graph without unarchiving your app’s own classes. BLOB cells in a database also offer a hex view.

Requirements

SimShelf makes no network connections of any kind. See the privacy policy and terms of use.