Try iOS Apps Using a Web Browser and Pieceable
After running into production issues which involved App Store regulations, Pieceable created an online interface which allows developers to demo their iOS apps before they are actually released--using a web browser.
Although the Pieceable IDE is still in private beta, the Pieceable Viewer is currently available for developers to preview their apps, or even develop apps using the web browser interface. Developers who want to use the Pieceable simulator just need to add a single line of code within their app. Then they upload the app to Pieceable and begin working with it.
The service is not free, however, and costs $30 per month. It allows the developer to preview five apps, with a limitation of three people viewing those apps at one time.