You can transfer IPA apps from pc to iOS devices with simple free apps and software. As prerequisite the device must be jailbroken.
These methods allow you to don’t use iTunes.
Method 1 – within iFile, Appsync, AppAddict
iFile is a popular iOS file manager that can be installed via Cydia. It has a web server and you can access the device and transfer files using wireless connection.
You just must activate the web server in the app (wi-fi symbol icon) and type the address provided in the browser of your pc.
The content of your device will be show and within a simple upload button you can start transfer files.
Then to install the .ipa files you must have installed Appsync and AppAddict (using the Installer feature, the files must be placed in the AppAddict folder otherwise will not be detected by the app).
Method 2 – iTools
This free software for Windows and Mac allows to easily transfer and install .ipa files (read the instructions).
Method 3 – iFunbox
This free software for Windows and Mac allows to easily transfer and install .ipa files (read the instructions).
How to transfer and install IPA apps on iOS devices by Simo Blog