Merriam-Webster, Inc. Reference
Merriam-Webster Dictionary is a reference app by Merriam-Webster, Inc. earning an estimated $40k/mo on the App Store with 70k installs a month. Below are its 4 current App Store screenshots.
Merriam-Webster Dictionary generates an estimated $40k per month in App Store revenue, from around 70k downloads a month. Its listing holds a 4.8-star rating across 324,816 ratings. The app has been on the App Store since 2010. Figures are monthly estimates of worldwide App Store performance.
Get America's most useful and respected dictionary, optimized for your iPhone, iPad, and Apple Watch. Continuously updated with the newest words and meanings, this is the premier iOS app for English language reference, education, and vocabulary building.
From the App Store listing.