Everyone ships Firebase. What makes Books & Reference different is the stack underneath: Start.io, AdColony, OneSignal and 6 more, ranked by how much more often they appear here than in the rest of the catalog.
Catalog-wide staples like Google Sign-In and Firebase are filtered out by design. Each SDK below is at least 1.5× more likely to ship in a Books & Reference app than elsewhere.
Raw adoption inside the category against adoption everywhere else. SDKs marked baseline ship in most apps regardless of category.
Build framework detected by static analysis across all 26 apps in this category. Native Android leads at 73%.
Click any card for the full framework breakdown, SDK list, and permission profile.
Last analyzedAnalysis dates reflect when each app was last scanned.
Across 26 analyzed Books & Reference apps, the SDKs that stand out most against the rest of the catalog are Start.io, AdColony and OneSignal. Start.io appears in 7 of 26 Books & Reference apps.
Native Android leads the category, used by 19 of 26 analyzed Books & Reference apps.
26 Books & Reference apps, with an average of 10.3 SDKs each, against 11.6 across the whole catalog.
FlyTrap ranks SDKs by how much more often they appear in Books & Reference apps than in the rest of the catalog, not by raw popularity. That filters out staples like Firebase and surfaces the integrations specific to Books & Reference.
Helpshift, AdColony +7 Travel & Local 42 apps 
Mapbox, Braintree +7 Weather 41 apps 
Braintree, Huawei AGConnect +7 Business 38 apps 
Realm Database, Razorpay +7 Lifestyle 38 apps 
Microsoft Clarity, Razorpay +7 Productivity 37 apps 
ML Kit Text Recognition, Notifee +7 Health & Fitness 35 apps 
Sourcepoint, Iterable +7 News & Magazines 35 apps 
Google Interactive Media Ads (IMA), Microsoft Clarity +7 Education 34 apps 
PostHog, TaurusX +7 Food & Drink 34 apps 
mParticle, Braintree +7 Entertainment 33 apps 
Realm Database, Lynx +7 Tools 33 apps Bigo Ads, IAB Open Measurement (OM SDK) +4 Social 32 apps 
Snap Kit, Xiaomi Push (MiPush) +7 Maps & Navigation 31 apps 
Google ARCore, Mapbox +7 Photography 31 apps 
Web3j, Razorpay +7 Educational 30 apps 
Unity Engine, FMOD +7 House & Home 30 apps 
Unity Engine, FMOD +7 Auto & Vehicles 29 apps 
Huawei AGConnect, InAppBrowser +6 Music & Audio 29 apps 
Bigo Ads, SafeDK +7 Board 28 apps Agora, Helpshift +7 Events 28 apps 
OneSignal, Huawei AGConnect +2 Parenting 28 apps 
Intercom, Adapty +5 Personalization 28 apps Singular, Airbridge +7 Casual 27 apps 
SuperAwesome, Moloco +7 Medical 27 apps Expo Dev Client, ML Kit Code Scanner +7 Puzzle 27 apps 
ByteDance Pangle, Huawei HMS Core +6 Dating 26 apps 
myTracker, Airbridge +7 Video Players & Editors 26 apps 
Helpshift, AppsFlyer +7 Art & Design 25 apps 
Apphud, Facebook Audience Network +7 Arcade 24 apps 
ByteDance Pangle, Huawei HMS Core +1 Strategy 24 apps Adjust, InAppBrowser Trivia 24 apps SafeDK, FMOD +7 Libraries & Demo 20 apps AppAuth, OneSignal +2 Role Playing 19 apps FMOD, Unity Engine +5 Comics 18 apps Umeng Analytics, LINE SDK +7 Card 17 apps FMOD, Unity Engine +7 Simulation 15 apps FMOD, Unity Engine +7 Racing 4 apps FMOD, Unity Engine +7 
