Search for really free Android Education apps with no IAP and no ADS

Title Score Score (w/installs) Installs Category Released
Google Classroom
2.4
8.8
100,000,000+
12 Jan 2015
Bible App for Kids
4.6
16.4
50,000,000+
25 Nov 2013
Unacademy Learner App
3.7
13.2
50,000,000+
13 Feb 2017
Doubtnut: NCERT, IIT JEE, NEET
4.3
15.2
50,000,000+
12 Oct 2016
Canvas Student
4.6
14.7
10,000,000+
20 Dec 2012
Remind: School Communication
4.4
14.2
10,000,000+
03 Oct 2012
Microsoft Math Solver
4.5
14.5
10,000,000+
04 Dec 2019
PBS KIDS Video
4.3
14.0
10,000,000+
22 Jun 2014
Khan Academy
4.3
14.0
10,000,000+
20 Sep 2015
Quizizz: Play to learn
4.7
15.3
10,000,000+
09 Sep 2017
AnkiDroid Flashcards
4.5
14.6
10,000,000+
31 Dec 1969
NASA
4.5
14.6
10,000,000+
05 Jul 2011
Cambly - English Teacher
4.2
13.5
10,000,000+
15 Feb 2014
Google Arts & Culture
4.3
13.9
10,000,000+
28 Nov 2015
Moodle
4.2
13.5
10,000,000+
04 Mar 2013
Toppr - Learning App for Class 5 - 12
4.1
13.2
10,000,000+
26 Aug 2013
Yandex Translate
4.6
14.8
10,000,000+
08 Jul 2013
NAVER Dictionary
3.9
12.5
10,000,000+
08 Apr 2013
Noon Academy – Student Learning App
4.1
13.3
10,000,000+
10 Mar 2017
Superbook Kids Bible App
4.8
15.6
10,000,000+
29 May 2013