Systematic and playful training in German and English spelling as well as mental arithmetic skills for school and career!
Now everyone can specifically improve their German or English spelling with the Correct Spelling App. Suitable for students (grades 3-13), adults, people with German or English as a second language, and senior citizens.

Correct Spelling App
Download the app now and try the first lesson for free. You can create up to three profiles.
🎯 Start now for free and improve your German or English spelling skills, as well as practice playfully for school (grades 3 to 13), work, and German or English as a foreign language.
🌟 Exercises with over 2000 common spelling mistakes from school dictations, exams and proofreading work.
🚀 Adjustable difficulty levels, ideal for all learning levels.
✍️ A good educational concept, developed by the Dr. Ehrlich Institute, to permanently avoid spelling mistakes.
📈 Motivating learning statistics: Document and celebrate your success.
📚 Playful learning with quotes and proverbs from across different cultures and eras to make you smile and think, from Goethe, Schiller, Fontane, Kleist and many more.
✅ Free: The Correct Spelling App is free for the first lesson of each difficulty level.
We offer two license models for the Pro version:
• 1.95 € / month
• 9.95 € / annually

A wonderful learning experience
The educational concept of the Correct Spelling App is based on the fact that words are spoken aloud and then written in full using an expanded selection of letters and inserted into sentences. Through listening, writing the words in full, and relating them to the quote or proverb, German or English spelling as well as memory are intensively trained.
For students
Every student from grade 3 to 13, and also students with German or English as a second language, can practice German and English spelling at different performance levels with the Correct Spelling App.
For adults
Spelling mistakes that frequently occur in everyday life should be easy to correct. Many adults would like to improve their spelling, provided the effort isn't too great and the practice is targeted.
For people with German or English as a second language
The Correct Spelling App aims to improve the German or English spelling of adults, and especially adults with German or English as a second language, according to their individual performance level.
For middle-aged or older people
The Correct Spelling App is aimed at older adults and helps them train their memory, attention, and concentration through targeted spelling exercises. The main goal is for adults and seniors to remember the corrections to their mistakes and maintain and strengthen their cognitive abilities through memory training.

Master Mental
Math App

Strong mental arithmetic skills support clearer thinking and help people respond more quickly to unfamiliar situations in everyday life.


Practice mental arithmetic
To improve math skills, mental arithmetic and a sense of numbers are very important. Mental arithmetic structures the brain and enhances memory. Additionally, mental arithmetic can also train cognitive abilities such as concentration, memory span, logical thinking, and attention. Those who stay sharp with mental arithmetic are fighting against aging. Mental arithmetic is purely a matter of practice.

Currently still in testing. Expected to be available by the end of February 2026.

Mental arithmetic for students
Every student from grades 2 to 13 can practice mental arithmetic at different skill levels with the Correct Calculation App. For training, we use a database with approximately 3,000 suitable mental math exercises across 7 different learning levels. These include simple addition/subtraction and multiplication tables, as well as three- and four-digit mental arithmetic exercises in the basic arithmetic operations.
For adults
Mental arithmetic structures the brain and enhances memory. Additionally, mental arithmetic can also train cognitive abilities such as concentration, memory span, logical thinking, and attention. Those who stay sharp with mental arithmetic are fighting against aging. Mental arithmetic is purely a matter of practice. With the Master Mental Math App, we aim to provide a positive, motivating learning experience.








