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

Title Score Score (w/installs) Installs Category Released
Quizizz: Play to learn
4.8
15.4
10,000,000+
10 Sep 2017
NASA
4.5
14.6
10,000,000+
06 Jul 2011
Canvas Student
4.5
14.5
10,000,000+
21 Dec 2012
Microsoft Math Solver
4.5
14.5
10,000,000+
05 Dec 2019
Remind: School Communication
4.4
14.3
10,000,000+
04 Oct 2012
AnkiDroid Flashcards
4.6
14.1
5,000,000+
01 Jan 1970
PBS KIDS Video
4.3
14.0
10,000,000+
23 Jun 2014
Khan Academy
4.3
14.0
10,000,000+
21 Sep 2015
Grasshopper: Learn to Code
4.5
13.8
5,000,000+
19 Jun 2017
BBC Learning English
4.5
13.7
5,000,000+
27 Aug 2018
Spanish Words Learn Español
4.7
13.1
1,000,000+
20 Aug 2014
DP Education
4.7
13.1
1,000,000+
29 Jun 2021
GRE Vocabulary Flashcards
4.7
13.0
1,000,000+
01 Jul 2013
Khan Academy Kids
4.7
13.0
1,000,000+
09 Jul 2018
R Discovery: Academic Research
4.6
12.6
1,000,000+
15 Apr 2020
Planets
4.6
12.6
1,000,000+
02 May 2012
Pluralsight – The Technology Skills Platform
4.5
12.5
1,000,000+
16 Apr 2011
Learn Italian Words Free
4.6
12.2
500,000+
16 Sep 2014
Kids A-Z
3.9
12.1
5,000,000+
09 Aug 2012
Seesaw Parent & Family
4.3
12.0
1,000,000+
04 Dec 2014