Books, by the numbers

Amazon Kindle: Reading App tops the category with 5,887,990 ratings. Audible isn't far behind at 5,626,869, and Libby comes in at 4,611,522. Those three apps alone carry more rating weight than almost everything else in Books put together, out of 36,672,507 total ratings in the category. A few giants sit at the top, and then a long tail trails off behind them. Pricing follows the free-first pattern you'd find in any crowded app store. Of the 12,274 tracked apps, 11,101 are free and 1,173 charge something, which breaks down to 9.6% paid versus 90.4% free. Among the paid apps, the $1-2.99 band leads with 375 apps, ahead of $3-4.99 (262), $5-9.99 (183), and $10+ (126). That cheap band falls just short of outnumbering the other three combined, but it gets close enough to make the point. Small impulse buys win here, and nobody seems to be running a volume business at $10 and up.

The publishers behind these apps tell a different story, though. Lyker Labs LLC has shipped 109 apps but collected only 177 ratings, less than 0.1% of the category. ISLAMOBILE has 63 apps and 713 ratings, another rounding error. RAVINDHIRAN SUMITHRA fares best of this bunch, pulling in 52,687 ratings across 64 apps, and that still barely clears 0.1% of category ratings. Add up the top three high-volume publishers, Lyker Labs, RAVINDHIRAN SUMITHRA, and ISLAMOBILE, and together they hold just 0.1% of all ratings in Books despite accounting for 236 apps between them. Shipping dozens of apps buys a publisher almost nothing here. Readers don't flock to an app just because a developer flooded the store with titles.

Look at the leaders and you see what actually wins readers: Kindle, Audible, Libby, then a steep drop to ピッコマ at 1,583,800 and 番茄畅听-海量小说音乐评书全场畅听 at 1,452,080, followed by Hoopla at 1,397,281. Not one of these is a single-book app. They're platforms, ebook ecosystems, audiobook subscriptions, library lending tools, serialized fiction readers. Goodreads (762,461) and Wattpad (706,082) round out the list too, and they're social and community tools rather than straight content stores. Readers reward infrastructure and access, not individual catalogs. Publishing a pile of standalone book apps won't build a hit, no matter how many titles Lyker Labs or ISLAMOBILE push out.

The median rating across Books lands at 4.6, which is high by any measure, and 4,375 rated apps clear 4.5 stars or better against just 741 sitting below 3.0. That kind of skew turns up across app categories in general, so star ratings alone don't tell you much here. Median download size comes in at 55.7 MB, which is surprisingly light for a category stuffed with audiobook and ebook readers that usually carry heavy media libraries. Most apps skip the bloat you'd expect from a books-and-audio category: 6,140 apps sit under 50 MB and only 273 reach 500 MB or more. High ratings paired with small file sizes looks less like proof of exceptional quality and more like a category full of simple, single-purpose apps that do one small thing well enough that nobody bothers to complain.

Maintenance looks steady, if nothing to brag about. 6,685 of the 12,274 tracked apps pushed an update in the last 12 months, a bit over half the category. Given how many of these are small, single-developer projects (Elyahu Sheetrit's 58 apps pulled in 44 ratings total, for example), that update rate reads as reasonable ongoing effort rather than neglect. Still, close to half the category hasn't been touched in a year, and in a field this crowded with low-rating apps, staleness hides easily behind a 4.6 median.

Pick an app in Books and the data points toward scale over novelty every time. The three leaders, Kindle, Audible, Libby, carry the overwhelming majority of real user feedback in this category, and that weight comes from years of catalog and subscription growth, not a marketing push. This category rewards platform apps with large catalogs and subscription models. A high star rating alone tells you almost nothing, since 4,375 apps clear 4.5 stars and most of them have a sliver of the ratings the leaders pull in. Check the rating count alongside the score, and if a developer's name keeps turning up attached to dozens of nearly identical small apps, treat that volume as a warning sign, not a credential.