Search for really free Android Books and reference apps with no IAP and no ADS

	Title	Score	Score (w/installs)	Installs	Category	Released
	YouVersion Bible App + Audio	4.9	18.0	100,000,000+	Books & Reference	01 Jan 1970
	Wikipedia	4.5	16.1	50,000,000+	Books & Reference	12 Jan 2012
	Sky Map	4.2	14.7	50,000,000+	Books & Reference	01 Jan 1970
	Libby, by OverDrive	4.6	14.3	5,000,000+	Books & Reference	16 Jan 2017
	Dictionary - WordWeb	4.5	13.9	5,000,000+	Books & Reference	21 Jan 2012
	Dictionary Linguee	4.8	13.2	1,000,000+	Books & Reference	12 Apr 2016
	DeepL Translate	4.8	13.2	1,000,000+	Books & Reference	29 Jan 2022
	FamilySearch Tree	4.7	13.0	1,000,000+	Books & Reference	14 Jul 2014
	hoopla Digital	4.7	13.0	1,000,000+	Books & Reference	24 May 2013
	Offline Survival Manual	4.7	12.9	1,000,000+	Books & Reference	15 Sep 2016
	Diccionario RAE y ASALE (DLE)	4.5	12.5	1,000,000+	Books & Reference	29 Nov 2015
	Inkitt: Books, Novels, Stories	4.5	12.4	1,000,000+	Books & Reference	06 Jan 2017
	FamilySearch Memories	4.7	12.3	500,000+	Books & Reference	10 Feb 2015
	Google I/O 2019	4.3	12.0	1,000,000+	Books & Reference	10 Jun 2014
	cloudLibrary	4.5	11.9	500,000+	Books & Reference	03 Oct 2011
	Portuguese Dictionary Offline	4.1	11.4	1,000,000+	Books & Reference	01 Aug 2016
	Knife Steel Composition Chart	4.9	11.3	100,000+	Books & Reference	04 Jun 2011
	MHGU Database	4.9	11.2	100,000+	Books & Reference	13 Jul 2016
	FanFiction.Net	4.1	11.2	1,000,000+	Books & Reference	17 May 2015
	Free Gurukul	4.7	10.8	100,000+	Books & Reference	13 Aug 2017