What Is an IPA File? Format, Structure, and How It Works on iOS
An IPA file is the packaged form of an iOS app — essentially a ZIP archive with a strict internal layout. Here's what's inside and why it matters.
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iOS IPA signing, demystified
Practical guides on Apple certificates, sideloading, and installing IPA files without the App Store. Updated regularly.
iOS Code Signing Explained: How Apple Verifies Every App
Code signing is the cryptographic system iOS uses to decide whether to trust an app. Here's the actual chain and why it breaks more often than it should.
Read article →iOS Provisioning Profile Explained — What's Inside and Why It Expires
The provisioning profile is the glue between your certificate, your app, and the devices it's allowed to run on. Here's a precise breakdown.
Read article →Apple Distribution Certificate: The Three Types and When to Use Each
There isn't one Apple Distribution certificate — there are three. App Store, Ad-Hoc, and Enterprise. Each comes with rules, costs, and tradeoffs.
Read article →How to Sign an IPA File Without an Apple Developer Account (2026 Guide)
Three legitimate ways to sign and install an IPA without paying for the $99/year Apple Developer program — including which one is right for your use case.
Read article →How to Find Your iPhone's UDID (3 Easy Methods, No Computer Needed)
Your UDID is the 40-character identifier needed to register your device with a Developer certificate. Three ways to get it, ranked easiest to most technical.
Read article →AltStore vs SideStore vs TrollStore — Free Sideloading Tools Compared (2026)
AltStore, SideStore, and TrollStore each solve sideloading differently. Here's which one fits your situation — and where they all fall short.
Read article →How to Choose an IPA Signing Service — 7 Things That Actually Matter
Most IPA signing services look identical from the homepage. Here's the hidden 7-point checklist that separates the dependable ones from the scams.
Read article →Apple Enterprise Certificate Explained: What It Is and How to Use It
Apple's Enterprise certificate lets you distribute iOS apps to unlimited devices outside the App Store — but the rules are strict. Here's what it actually is and how it works in 2026.
Read article →Why Your IPA Isn't Installing — 10 Causes and How to Fix Each One
When an IPA refuses to install, the cause is usually one of ten things. This is the diagnostic checklist that'll solve 90% of cases.
Read article →"Unable to Verify App" iOS Error — What Causes It and How to Fix It
This error is iOS telling you it couldn't reach Apple to validate the certificate. The fix depends on which of four causes you're hitting.
Read article →iOS Certificate Revoked — What It Means and How to Recover
A certificate revoke kills every app signed with it, simultaneously, with no warning. Here's how to detect one and recover quickly.
Read article →Install IPA on iPhone Without Jailbreak — Complete 2026 Guide
Jailbreaking is dead in 2026 — and you don't need it. Here's how to install any IPA on iPhone safely, with or without a computer.
Read article →"Untrusted Developer" on iPhone — How to Trust a Developer Profile
iOS shows "Untrusted Developer" on every newly-installed sideloaded app. The fix is one Settings menu away.
Read article →How to Install IPA Files with AltStore (2026 Tutorial)
AltStore is the most popular free sideloading tool. Here's a full walkthrough — both the classic version and the EU-only AltStore PAL.
Read article →How to Install IPA Files with Sideloadly — Complete Setup Guide
Sideloadly is the simplest free way to install a single IPA on iPhone from a computer. Setup, usage, and where it falls short.
Read article →Re-sign IPA Files Online — Why, When, and How to Do It Properly
When your signed IPA stops launching, the fix is almost always a re-sign. Here's what re-signing actually does and how to do it without losing your data.
Read article →How itms-services Install Links Work (And Why HTTPS Matters)
Want to install an IPA by tapping a website link? That's the itms-services protocol. Here's the full plist + HTTPS setup it requires.
Read article →How to Install IPA on iPad — Step-by-Step Guide for 2026
iPad sideloading follows iPhone rules with a few twists. Here's the full process for iPadOS 17 and 18, including M-series iPad notes.
Read article →iOS Beta Testing Without TestFlight — When and How to Bypass It
TestFlight isn't always the right beta channel. Here's when bypassing it makes sense, and which signing approach replaces it best.
Read article →Developer vs Enterprise Certificate — Which One Do You Actually Need?
Both certificates sign IPA files, but they're built for very different jobs. Here's a real-world breakdown so you pick the right one the first time.
Read article →Scarlet and ESign Alternatives — What to Use After They Shut Down
If you relied on Scarlet or ESign and need a new approach, here's what the post-Scarlet landscape looks like and what actually works in 2026.
Read article →Install IPA on iOS 17 — Complete 2026 Guide
iOS 17 tightened a few things but sideloading still works the same. Here's what's different and what you need to know.
Read article →Install IPA on iOS 18 — Complete 2026 Guide
iOS 18 split sideloading into two paths — DMA marketplaces for the EU, traditional cert signing for everywhere else. Here's when to use which.
Read article →Enterprise iOS App Distribution for Companies — A Practical Playbook
Three real options for distributing iOS apps to your employees: MDM, Apple Business Manager, or Enterprise signing. Each has a place — here's when to use which.
Read article →Ready to sign your IPA?
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