Fewer than a quarter of the 34,624 apps in our library ship on both stores

App Store only is 18,821 apps, 54.4% of the 34,624. Google Play only is 7,707, or 22.3%. Both stores is 8,096, or 23.4%. The three shares are rounded to one decimal and sum to 100.1%.

Read from each store's side, the same 8,096 apps produce two different rates. Of the 26,917 apps with an App Store listing, 30.1% also hold Google Play. Of the 15,803 with a Google Play listing, 51.2% also hold the App Store.

Those two rates are one number divided two ways, so they are one fact and not two. In this library the smaller store population is the more cross-listed one. A Google Play app is close to a coin flip to hold the App Store as well. An App Store app is closer to three in ten.

If you are App Store only, 18,821 apps in this library are where you are and 8,096 are where you would land. Neither figure says the port pays. What they set is the base rate: one store is the ordinary condition of the apps we track, at 26,528 of 34,624.

Our data cannot price the port. Downloads and revenue are third-party estimates, not figures reported by the developer. They are rounded at source, so a month-to-month movement of a million is rounding and not growth. A before-and-after read across one launch month would be reading that rounding.

The library spans 31 categories of unequal size. Utilities is 3,354 apps, Games 2,499 and Finance 2,453. Those three alone are 8,306 of the 32,751 apps the category counter covers, or 25.4%. A library-wide split averages over all 31, and the split you act on is your category's.

These figures describe Apptonic's own library as of 14 August 2026. The library is a growing sample of the app market, not a census. Apps enter it because a customer asked about one, or because it arrived as somebody's competitor, so the mix follows who our customers compete with. If the people asking skew toward one store, so does 23.4%.

The measurement error has a known direction. An app counts in a store's column when we hold a listing for it there. A second listing we have not found leaves that app in a single-store group.

Unlinked pairs push the both-stores count down and never up. 8,096 is therefore a floor, and we publish no rate for how often it happens, because we have not measured it.

What we hold per app is also uneven, and any comparison built on top of these counts inherits that.

Four comparisons a reader will want are missing, because we have not counted them. They are the store split by category, the split by price, ratings per store, and install estimates per store.

The first two are one count per store per category off the listing browse. The last two run only on the subsets that carry the data: 14,498 apps with an estimate, 2,488 with reviews. Each needs its own denominators printed, and each is a separate article.

One more question stays open, and it is the one a founder asks first. This page cannot say which store an app started on. Every listing carries its own store release date, and we have not compared those dates across the 8,096 two-store apps. Until that runs, the launch-order pattern here is unknown, and any account of iOS-first is a story and not a count.