This page combines AppGoblin intelligence for SDKs, API calls, app-ads.txt records, creatives, and mediation relationships tied to real mobile app IDs so you can evaluate technical footprint and competitive position quickly.
Facebook's Totals
Books & Reference Apps with Facebook SDKs
Verified SDK counts are based on apps decompiled by AppGoblin.
| Android | iOS | |
|---|---|---|
| Books & Reference Apps | 1,185 | 845 |
| Monthly Installs | 41.4M |
App-Ads.txt DIRECT apps
Android Adstxt apps
6,233
iOS Adstxt apps
1,270
Facebook's Android Top Apps
| App | Monthly Installs | SDK | API Calls | App-Ads.txt | |
|---|---|---|---|---|---|
| 1 |  Bible Offline-KJV Holy Bible Bíblia Offline | 1.7M | |||
| 2 |  Wattpad - Read & Write Stories Wattpad.com | 1.6M | |||
| 3 |  Al QURAN - القرآن الكريم 9D Muslim Apps - Quran, Qibla Direction & Prayers | 1.6M | |||
| 4 |  Holy Quran - Deeper journey Avn Global Application | 1M | |||
| 5 |  Fizzo - Novel & Drama POLIGON | 879.7K | |||
| 6 |  Bible For Women-Holy Bible App Bíblia Offline | 827.3K | |||
| 7 |  GoodNovel - Booktok, Stories GoodNovel | 804.5K | |||
| 8 |  HOLY QURAN (القرآن الكريم) Sahell | 673.1K | |||
| 9 |  مصحف المدينه قران كريم بدون نت Madar Software | 650.9K | |||
| 10 |  King James Bible - Verse+Audio Ozion | 516K |
Facebook's iOS Top Apps
| App | Monthly iOS Ratings | SDK | App-Ads.txt | |
|---|---|---|---|---|
| 1 |  Bible Life.Church | 9.5M | ||
| 2 |  Hallow: Prayer & Meditation Hallow, Inc. | 1.3M | ||
| 3 |  GoodNovel - Booktok, Stories SINGAPORE NEW READING TECHNOLOGY PTE. LTD. | 933.1K | ||
| 4 |  Bible Widgets: Verses & Prayer Motivation Apps Free | 901.7K | ||
| 5 |  Lịch Vạn Niên 2026 & Lịch Việt Phan Hanh | 899.5K | ||
| 6 |  Galatea: Books & Audiobooks Inkitt | 886.4K | ||
| 7 |  微信读书 Tencent Technology (Shenzhen) Company Limited | 863.2K | ||
| 8 |  Bible Chat: Daily Devotional Book Vitals Inc. | 806.4K | ||
| 9 |  Muslim Pro: Ramadan 2026 Bitsmedia Pte Ltd | 747.7K | ||
| 10 |  Goodreads: Book Tracker & More Goodreads | 659K |