Everyone ships Firebase. What makes Books & Reference different is the stack underneath: Start.io, Google ARCore, Notifee 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 28 apps in this category. Native Android leads at 75%.
Click any card for the full framework breakdown, SDK list, and permission profile.
Last analyzedAnalysis dates reflect when each app was last scanned.
Across 28 analyzed Books & Reference apps, the SDKs that stand out most against the rest of the catalog are Start.io, Google ARCore and Notifee. Start.io appears in 6 of 28 Books & Reference apps.
Native Android leads the category, used by 21 of 28 analyzed Books & Reference apps.
28 Books & Reference apps, with an average of 9.3 SDKs each, against 10.4 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.
AdColony, Helpshift +7 Finance 54 apps 
EngageLab Push, Sumsub +7 Weather 38 apps 
Amplitude Events 33 apps 
InAppBrowser, OneSignal +1 Adventure 32 apps 
ByteDance Pangle, Huawei HMS Core +2 Comics 30 apps 
Umeng Analytics, Tapjoy +7 Dating 30 apps 
ML Kit Face Detection, Sentry Session Replay +7 Medical 30 apps 
Segment, ML Kit Code Scanner +7 Music & Audio 30 apps 
MoEngage, Snap Kit +7 Photography 30 apps 
Alipay, Lottie +5 Shopping 30 apps 
RootBeer, Google Wallet +7 Social 30 apps 
Xiaomi Push (MiPush), Lynx +7 Trivia 30 apps 
SafeDK, FMOD +7 Art & Design 29 apps 
RevenueCat, Amplitude Board 29 apps 
Agora, Helpshift +7 Business 29 apps 
AppAuth, ML Kit Barcode Scanning +4 Card 29 apps FMOD, Unity Engine +7 Casino 29 apps OneSignal, Huawei AGConnect +7 Casual 29 apps 
Bugsnag, SuperAwesome +7 Education 29 apps 
Segment, PostHog +7 Educational 29 apps Unity Engine, FMOD +7 Entertainment 29 apps 
Agora, Bugsnag +7 Health & Fitness 29 apps 
SQLCipher, Alipay +7 House & Home 29 apps 
Umeng Analytics, AppMetrica +7 Libraries & Demo 29 apps OneSignal, Google AdMob +7 Lifestyle 29 apps Bugsnag, Facebook Gaming Services +7 Maps & Navigation 29 apps 
Google Wallet, RootBeer +7 Music 29 apps 
Intercom, Adapty +7 Role Playing 29 apps FMOD, Unity Engine +2 Strategy 29 apps Adjust, InAppBrowser +1 Video Players & Editors 29 apps TaurusX, Start.io +7 Word 29 apps Huawei AGConnect, InAppBrowser +6 Beauty 28 apps MMKV, Google Tag Manager +3 Personalization 28 apps 
ByteDance Pangle, Huawei HMS Core +5 Tools 28 apps Bigo Ads, Google ARCore +3 Action 27 apps 
AppsFlyer, ByteDance Pangle +4 Communication 27 apps 
Web3j, Stripe +7 Simulation 27 apps FMOD, Unity Engine +7 Food & Drink 26 apps 
AWS Amplify, Braze +7 News & Magazines 26 apps Firebase Auth, MMKV Travel & Local 26 apps 
Alipay, GeeTest CAPTCHA +7 Productivity 25 apps AppAuth, Google Identity Credentials +3 Racing 4 apps FMOD, Unity Engine +7 
