Open source · iOS 16+

Sign apps.
Your rules.

DefianceSign is an on-device IPA signer for iPhone and iPad. Import your own Apple Developer certificate, sign locally, and install — no cloud, no shared keys.

Get latest IPA Setup guide
Own .p12 certificate App Library Semi-local install No telemetry
D
Import certificate.p12 + .mobileprovision
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Add IPAFiles, URL, or App Library
✓
Sign & installOver your local network

Built different

Your keys, your device

Certificates and passwords never leave your iPhone or iPad. No backend, no shared certs.

App Library

Browse community sources from Ksign, Feather, SideStore, and more — optional, on your terms.

Full signing pipeline

zsign-powered resign, dylib injection, bulk sign, and network install via itms-services.

Quick start

01
Install DefianceSign

Sideload the IPA with Sideloadly, ESign, or SideStore using your developer certificate.

02
Import your certificate

Settings → Certificates → import .p12 and .mobileprovision. Bundle ID must match your App ID.

03
Sign & install

Add an IPA, sign it, tap Install. Trust your developer profile in iOS Settings if prompted.