send ipa file to client

There is two best site to send the build (.ipa ) file to client

1] diawi (www.diawi.com)-

Diawi is a tool for iOS developers to deploy Development and Ad hoc iOS applications directly to the device.

1. Upload the application and its provisioning profile.2. Send the link to your testers, clients, friends or even use it yourself.3. Open the link in Safari on the iOS device and click on install.
After the upload, Diawi creates a unique short URL to access the installation page (for ex: aBcDeF). When opened in Safari on the iOS device, the page will display a link to install the application.
This features allows to quickly deploy applications to testers, clients, medias, bloggers or friends without the need to send large files by e-mail.
The installation using Diawi is a lot easier than through iTunes or the iPhone Configuration Utility : a simple URL and only 1 tap is needed.

        Diawi is based on Apple's wireless distribution model introduced in iOS 4 to allow development application installation without iTunes or even a computer.

2] Testflight  (http://www.testflightapp.com)-

TestFlight is a free platform used to distribute beta and internal iOS/Android applications to team members over-the-air. Developers can manage beta testing campaigns and receive feedback from their team with TestFlight's dashboard. With theTestFlight SDK implemented in an application, (https://www.testflightapp.com/sdk/) users can acquire more metrics on how and what testers are doing when testing an application on their device. The SDK works for both beta versions and live versions available in the App Store.