Hurricane by American Red Cross joins the top free iOS app this week at No. 4, according to research from AppData. The free app lets users monitor storm conditions in their area and gives tips on how to prepare for a storm and keep in touch with loved ones.

Below, we’ve listed the top free iOS apps of the week. The list links to Inside Network’s research about the individual apps, including historical charts, developer information and download information.

To prepare for Mediabistro’s upcoming Media App Summit on December 3, 2012, we spotlight the top free apps every week–helping our readers discover, enjoy and analyze successful content.

Top Free iOS Apps of the Week

1. YouTube YouTube
2. Weird But True Weird But True
3. Slendr Slendr
4. Hurricane by American Red Cross Hurricane by American Red Cross
5. Bubble Galaxy with Buddies Bubble Galaxy with Buddies
6. Flashlight Ⓞ Flashlight Ⓞ
7. Stacheify Stacheify
8. The Weather Channel® The Weather Channel®
9. Podcasts Podcasts
10. Instagram Instagram

More detailed stats are available at AppData Pro, Inside Network’s data service supplying performance data, including historical user data, audience demographics, and company information for developers and applications.