“pdf viewer”

Difficulty

The typical top-10 app has 897.8K ratings. Dominated by giants. Use it in your description, but chase smaller words to rank.

Keyword in the app name

1 of top 10

Some top apps use it in their name. Having it helps, but it is not required.

Newest app in the top 10

Released 5 years ago. Only older, established apps rank here.

Publishers with several spots

• Simple Design Ltd.2 apps · best #2
• MobiSystems2 apps · best #12

Top 10 average rating: ★ 4.4