Comparison

Calc Visualizer vs Spelling German Basic School

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calc Visualizer

Features
Read full description

Calc Visualizer helps the user better understand some of the most important concepts of calculus. The app includes eight different modules: 1) Descartes' Method, 2) Fermat's Method, 3) Derivatives, 4) Areas under Curves, 5) Fundamental Theorem, 6) Slope Fields, 7) Max-Min problems, and 8) Related rate problems. Highly interactive, but with extensive instructional help screens and animations.

About

Spelling German Basic School

Master common German spelling errors with over 900 essential words for elementary students. This app focuses on frequently misspelled words and basic grammar rules for effective and playful learning.

Highlights
  • Over 900 essential German words
  • Focus on frequently misspelled words
  • Covers basic grammar rules (uppercase, das/dass, tz/zz/ck)
  • Efficient learning algorithm
  • Simple and clear interface
Features
Read full description

Fast and effective! What is correct: vielleicht or vieleicht, nämlich or nähmlich, den or denn etc. The Basis: Over 900 words which a „Grundschüler“ should know! - learn the right thing - learn most effective Learn that what you need: 
The words most frequently misspelled- and not dozens of spelling rules, which you may forget anyway! Extensive analyzes have revealed a list of words, which are often used, but unfortunately often misspelled - these words you will learn quickly and almost playful with this app. 

Perhaps you will also be amazed how some commonly used words are spelled correctly - give it a try!

Plus, there's the usual topics of upper and lower case letters, as well as das or dass and last not least tz, zz and k, kk or ck.

Select the lesson and off you go! 
 Learn as efficiently as possible:
A complex algorithm determines the order in which words / phrases are shown - thats how rapid and sustainable learning is possible. 

No complicated Operation - but clear and simple, focused on effective learning!

Learn on the go or at your desk - the results will speak.

Screenshots

Spelling German Basic School4 screens

Verdict

The call

The clearest difference is price: Calc Visualizer at Free against Spelling German Basic School's $1.99. Calc Visualizer also leads on iOS requirement (8.0 vs 16.6). Spelling German Basic School's advantage is update cadence (every 6 weeks vs every 44 months) and device support (3 vs 1). On in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Calc Visualizer is free to download; Spelling German Basic School costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Calc Visualizer ships an update every 44 months, Spelling German Basic School every 6 weeks. The most recent releases landed on September 9, 2026 and July 9, 2026 respectively.

Scorecard4 real differences · 6 level
Calc Visualizer versus Spelling German Basic School: the parameters behind the verdict, then further details
ParameterCalc VisualizerSpelling German Basic School
PriceFree — better$1.99
Rating—3.9 (9 ratings) — better
Positive reviews—75.0% of reviews
Number of ratings—9 — better
Update frequencyEvery 44 monthsEvery 6 weeks — better
AdsNo—
In-app purchasesNoNo
Monetization—Paid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS8.0 — better16.6
Further details — not scored
Size39 MB6 MB
Age rating4+4+
DeveloperThomas BretlDieter Bartsch

In-app purchases

None

Calc Visualizer

No in-app purchases

None

Spelling German Basic School

No in-app purchases

Questions

Is Calc Visualizer free?
Calc Visualizer is free to download, with no in-app purchases.
Is Spelling German Basic School free?
Spelling German Basic School costs $1.99, with no in-app purchases.
Which is updated more often, Calc Visualizer or Spelling German Basic School?
Calc Visualizer ships an update every 44 months, and Spelling German Basic School every 6 weeks. Most recently, Calc Visualizer was updated on September 9, 2026 and Spelling German Basic School on July 9, 2026.

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