App Store Data Glossary

Plain-English definitions of the numbers behind our record boards.

Every record on this site is built from public App Store data. Here is what each term means and why it matters, so the boards read clearly whether you are a curious iPhone owner or comparing apps in detail.

Rating count

The total number of ratings an app has received on the App Store. It is the closest public measure of an app's popularity, though it reflects lifetime ratings, not just recent ones.

Average rating

The mean star rating, from 1 to 5, that users have given an app. A high average is most meaningful when it is backed by a large rating count.

File size

The download size of the app package. Larger apps often bundle more media, offline data, or features, but a big size does not always mean a better app.

Content rating

Apple's age-suitability label for an app: 4+, 9+, 12+, or 17+. It is assigned based on the kinds of content an app can show.

Longevity

The span of time between an app's first release and its most recent update. A long, unbroken run is a sign of an app that is still cared for.

Minimum iOS

The oldest version of iOS an app still runs on. A low minimum means the app supports older iPhones and iPads.

Language count

The number of languages an app is localised into, as listed on its App Store page. More languages usually means a broader, global audience.

Universal app

An app that runs on both iPhone and iPad from a single download.

Record board

A leaderboard that ranks apps by one measurable, factual thing, such as the most ratings, the largest size, or the earliest release date.

Reigning holder

The app currently ranked number one on a record board, also called the crown. Because boards recompute continuously, crowns can and do change over time.

Curious how the boards are computed and refreshed? See our About page and the FAQ.