I am developing an iPhone app for a private company. It contains business critical data and should only be able to use for this company.
Do I still need to go via the App store? Is there not a private way to do this?
Your company can pay $299/yr to join the enterprise program which allows you to deploy app without going through the AppStore.
You can create Ad Hoc distributions for ≤ 100 users.
You can jailbreak all the target iPhones and do whatever you want.
If you want the employee to download your apps over the air without listing each employee's UDID you want to subscribe to enterprise program.
However, even with you enterprise license you will have to distribute by yourself your apps to employees. To ease your distribution, you can use private stores solutions like Appaloosa.
You may test & love testflightapp.
If you want to stay completely private (apart of submiting the UDIDs to Apple), then build your own OTA-server. It's done in a few minutes, only registered UDIDs can use the app, and no 3rd party has access to your ipa.
You might want to look into the Enterprise program. I have no personal experience with it, but as I understand it, it might be what you are looking for.
来源：https://stackoverflow.com/questions/2583920/private-iphone-app-without-app-store