Lotum GMbH’s picture word games 4 Pics 1 Word: What’s the Word and 4 Pics 1 Word have joined the top free Android apps list this week at No. 6 & No. 7, according to research from Google Play. The games encourage players to identify common themes in a set of images. 4 Pics 1 Word: What’s the Word is also ranked on the top iOS apps list this week.

Below, we’ve listed the top free Android apps of the week. The list links to Google Play’s research about the individual apps, including user reviews.

As part of Mediabistro’s Media App Summit which took place last year, we spotlight the top free apps every week–helping our readers discover, enjoy and analyze successful content.

Top Free Android Apps of the Week

1.  Facebook for Android

2. Pandora

3. Temple Run 2

4. Instagram

5. Facebook Messenger

6. 4 Pics 1 Word: What’s the Word

7. 4 Pics 1 Word

8.  Subway Surfers

9. Skype

10. The Simpsons: Tapped Out