The most popular types of mobile apps are:

1. Social media apps such as Facebook, Instagram, and Snapchat
2. E-commerce apps like Amazon and eBay
3. Gaming apps like PUBG, Candy Crush, and Fortnite
4. Entertainment and streaming apps like Netflix and YouTube
5. Food delivery and restaurant apps like Uber Eats and Grubhub
6. Fitness and health apps like MyFitnessPal and Fitbit
7. Navigation and map apps like Google Maps and Waze
8. News and information apps like CNN and BBC News
9. Utility apps like Dropbox and Google Drive
10. Dating apps like Tinder and Bumble.

These are just some examples, and the popularity of different app categories can vary depending on the region, user demographics, and current trends.