Addition and subtraction to 20 app icon

Addition and subtraction to 20

Follow through this app how your child grows in adding and subtracting up to 20.

Tradfri Lux · com.tradfrilux.wijsr

Not rated yet 5K+ downloads v1.2.7 19.5 MB Android 4.1+ PEGI 3 · Everyone

  • Signature matches the Google Play version Details

At a glance

Latest version
v1.2.7 (143)
Updated
Dec 4, 2025 (10 months ago)
APK size
19.5 MB
Requires
Android 4.1+ (API 16)
CPU support
ARM 64-bit
Graphics
OpenGL ES 2.0+
Category
Educational (game)
Listed since
Jun 12, 2023 (at least)
Permissions
5 (1 sensitive)
Developer contact
[email protected]
Privacy
Developer's privacy policy

About this APK

Addition and subtraction to 20 is a game by Tradfri Lux in the Educational category, listed since at least June 2023. It includes native code only for ARM 64-bit, so it won't install on phones that can only run 32-bit apps.

It asks for 5 permissions, 1 of them sensitive: modify shared storage.

What's new in v1.2.7

1.0 Initial version 1.1 Add support for multiple pupils 1.2 improved data analysis

Description

From the listing uploaded by “appupdater”.

Are you a teacher, parent, speech therapist, remedial teacher, educator, ...? Do you recognize the feeling ... ⚫ that you would like to help everyone in the classroom, but that this sometimes fails? ⚫ that you want to help a child as well as possible, but that you do not know where he / she gets stuck and how you can best guide him / her? ⚫ that you would like to help your child, but you don't know how? Then this app is the solution for you! This app helps you if you want to support a child in its growth in adding and subtracting up to 20. This app is useful if the child is in the first grade/KS1 (but also in the second grade this remains an important base). This app is very well thought out in terms of content and design. Below you can find the most important features. Features ⚫ built up step by step: you can only "unlock" the next level if you master the previous type of exercises       o Addition and subtraction up to 6       o Addition and subtraction up to 10       o Addition and subtraction up to 20 (without and with bridge) ⚫ 12 levels with 40 different types of exercises ⚫ the focus is on individual growth: each child can work at his level and this progress is always saved on the device ⚫ positive feedback is at the heart of the app ⚫ Uses a smart exercise generating mechanism so that every child has sufficient success experiences ⚫ intentionally picked a soothing and child-friendly layout, in which growing and blossoming are central This app is currently available in Dutch and English. It has already been tested by a group of first grade children. They were very enthusiastic and very motivated to work this way. This app was created in close collaboration with app developers and (care) teachers. This collaboration has made it a wonderful app with a very thoughtful content structure, based on practical experience. If you have any nice suggestions or feedback about this app, please do not hesitate to contact us at [email protected].

Security & authenticity

Security rating: Trusted

Signing certificate

  • Signature matches the Google Play version Checked by the source store on Dec 4, 2025.
  • Certificate from Google Play App Signing Google keeps the signing key for the developer, so the certificate carries Google's name.

Store checks and file details

  • Developer signature verified Dec 4, 2025
  • Validated against Google Play Dec 4, 2025
  • Signed byCN=Android, OU=Android, O=Google Inc., L=Mountain View, ST=California, C=US
  • Signing certificate (SHA-1)3D:15:D5:B8:62:CF:7C:B1:E0:4C:E0:52:D7:7E:03:BC:47:F7:8A:65
  • File MD5931c335cf3c8077ee232938f895d42f3
  • Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures. AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (5)

Addition and subtraction to 20 requests 5 permissions, 1 of them sensitive.

Required hardware & features

Addition and subtraction to 20 APK: questions and answers

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the Addition and subtraction to 20 APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. After downloading, check that the file's MD5 is 931c335cf3c8077ee232938f895d42f3.

Tags

More Educational games