# Wijsr — Addition & subtraction till 20

> Educational app for learning addition and subtraction up to 20. (iPhone/iPad app by Tradfri Lux.)

- Source: https://appshunter.io/ios/app/wijsr/id1516335537 (this page in markdown: same URL + `.md`)
- Developer: [Tradfri Lux](https://appshunter.io/developer/1478515728)
- Category: Education, Games
- Price: $0.99
- Age rating: 4+
- Requires: iOS 10.0 · 30 MB
- Released: 2020-06-07
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/wijsr/id1516335537/reviews.md

## What is Wijsr?

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 info.wijsr@gmail.com.

## Key features

- Step-by-step learning progression
- Addition and subtraction up to 20
- 12 levels with 40 exercise types
- Individual progress tracking
- Positive feedback and success experiences
- Child-friendly design

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/wijsr/id1516335537/reviews.md

### 2/5 — Maths app

*2023-06-05*

Very good

## Frequently asked questions about Wijsr

### What age is Wijsr suitable for?

Wijsr is suitable for children aged 4 and up. It is specifically designed to support first-grade students in developing foundational addition and subtraction skills up to 20.

### How does Wijsr help children learn math?

Wijsr uses a step-by-step approach, unlocking new levels only after mastering previous exercises. It features 12 levels with 40 different exercise types, focusing on individual growth and providing positive feedback to ensure success experiences.

### Can Wijsr be used on multiple devices?

Yes, Wijsr is supported on iPhones, iPads, and iPods. The app is designed to save each child's progress directly on the device.

### What languages does Wijsr support?

Wijsr is currently available in Dutch and English. The app was developed in collaboration with educators to ensure practical and effective content.

### How often is Wijsr updated?

The latest version of Wijsr is 1.2, and it was last updated on October 17, 2020. Future updates may introduce new features or improvements based on user feedback.

### Does Wijsr have ads?

No, Wijsr does not contain advertisements. It is a paid application focused on providing an uninterrupted learning experience for children.

### What is the learning methodology of Wijsr?

Wijsr employs a structured, step-by-step learning methodology that builds upon foundational concepts. It focuses on individual progress, ensuring each child can work at their own pace and achieve success through a smart exercise generation mechanism.

### Does Wijsr offer certifications?

Wijsr is designed as a practice tool to build foundational math skills and does not offer formal certifications. Its primary goal is to help children master addition and subtraction up to 20.

## Version history (last 2 releases)

### 1.2 — 2020-10-17

1.0: initial version
1.1: added support for multiple pupils

### 1.0 — 2020-06-07

No release notes.

## More apps by Tradfri Lux

- [Hue Melodi](https://appshunter.io/ios/app/hue-melodi/id1481700517)
- [Hue Lightning](https://appshunter.io/ios/app/hue-lightning/id1519679914)
- [Flow for Hue](https://appshunter.io/ios/app/flow-for-hue/id1519679961)
- [Wijsr 2](https://appshunter.io/ios/app/wijsr-2/id1530045855)

All apps by Tradfri Lux: https://appshunter.io/developer/1478515728

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*