How to get the .ipa file you created on an iPad or iPhone outside of the App Store
1. Install from Xcode
Sometimes, mainly for troubleshooting purposes, you may want to install the .ipa file via Xcode.
- Connect your iOS device via USB, then open Xcode
- From the Window menu, select "Devices and Simulators"
- Select your device from the list of devices, then use the "+" sign to install the .ipa.
If something is wrong with the build or with your provisioning profile, you will usually get a more detailed error message in Xcode than in iTunes.
2. Deploy the app over the air (Twixl built-in)
This method allows you to distribute the app more easily without the need for iTunes syncing. The .ipa file will be installed on a secure web server, and users will be able to install the app directly on the device.
2.1. Deployment URL
Before you create a build of your app, enter the deployment URL in the "Code Signing" section of the build settings. The deployment URL is the location on your web server where you will be putting the app.
Apple requires the deployment URL to be a secure (https) URL, so you may need to get an SSL security certificate for your web server.
As of iOS 9, Apple requires the certificate for an Enterprise app to be explicitly accepted first, before you can install apps from that company. First install the Enterprise app, then navigate to Settings -> General -> Profiles -> Enterprise app. There you will be able to trust the certificate for the company you just installed the app from.
2.2. Create a build
In the Application options, select "Generate Over-the-air install files" and create the build.
Three files will be generated when you create a build:
- [appname].ipa (the application file)
- [appname].plist (a plist file)
- [appname].html (the page to navigate to)
If you copy the three files to the folder that was specified as the deployment URL, users will be able to navigate to https://[yourserver].com/[appfolder]/[appname].html from their iOS device to automatically install the application.