Invalid IPA

Update: In the Interest to Save Time, Try downloading a different version of IPA App if possible and comfortable to do so, to increase the chances of installing IPA successfully.
It is no surprise, that Most Installous Users face this Error at certain point of time. So how to fix this annoying error solution is this post all about.
The primary error cause can be narrowed down based on considering different factors or activities we follow to download the IPA file. First off, if you were downloading on a slow internet, the chances are the file is corrupt or partially downloaded and still shows successfully downloaded message. It can be the same situation even with high speed internet, if the file is corrupt at hosting level. So work around for this is to download the file from Different source. So now I will concisely give you steps of workarounds to fix errors starting with bare minimum foolish assumptions to advanced level fixes.
1- Try re downloading the same file from a entirely different source
2- try Downloading the Application with different version; old or new version
3- Try installing the app from computer comfort, ifunbox or, Xilisoft ipad Magic Platinum or Syncios
4- Turn WIFI off and ON again and try installing again with the new IPA file
5- Remove Syncapps from Cydia and Reboot and Reinstall Syncapps for your IOS
6- Completely Remove Installous from Cydia and Reinstall it after Reboot
Majority of errors are/will be fixed when re-downloading the file from a different source or different version. So I highly recommend to download a file without any pauses and file corruption possibilities.
Hope this helps, some tired Tweakers.
Thanks – Chaladi