Comparison

Grade Aid vs Centrum School Grading

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

Head to head
About

Grade Aid

Easily calculate grades and score assignments or tests. This tool helps educators quickly score tests and assignments based on correct or incorrect answers. Students can verify their grades and determine how many questions they can miss while maintaining a target grade.

Highlights
  • Grade calculation
  • Score assignments
  • Test scoring
  • Target grade verification
  • Homeschooling support
Features
Read full description

Whether you are an educator grading a stack of papers or a student checking your score, Grade Aid- gives you a fast, simple way to calculate percentages and letter grades. Quickly score tests or assignments by entering the total number of questions to view scores by the number answered right or wrong. Customize your results by adjusting decimal places. Unlock additional features to choose from percentage-based grading scales or hide the letter grade to view only the percentage of correct or incorrect answers. For educators: Grade Aid- helps you quickly score quizzes, tests, and assignments without needing a calculator or manual grade chart. For students: Use Grade Aid- to verify your grade, check your percentage, and see how many questions you can miss before falling below your target score. Simple, flexible, and easy to use, Grade Aid- is a handy tool for classrooms, studying, grading, and everyday academic planning.

About

Centrum School Grading

Features
Read full description

Oral exams can be difficult to grade: students may ask why they got a specific result with a detailed explanation. Centrum to the rescue! It's easy for a teacher to state at what percentage a specific question was answered. The student could only name 3 of 4 specific countries in Europe? That's 75 % right there! He or she knows all the capitols in the United States? That's a whooping 100 %! But this second question was much harder, so it must be weighted twice! Centrum automatically computes the average of all these percentages and uses a selected grading key for the final grade. Start grading like a pro!

Screenshots

Grade Aid4 screens
Centrum School Grading4 screens

Verdict

The call

The clearest difference is in-app purchases: Centrum School Grading at none against Grade Aid's 1. Grade Aid's advantage is update cadence (every 8 months vs every 49 months) and iOS requirement (18.6 vs 26.0). On price, ads and device support 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

Both are free to download. Grade Aid sells 1 one-off in-app purchase. Centrum School Grading asks for nothing beyond the download.

UpkeepUpdate frequency

Grade Aid ships an update every 8 months, Centrum School Grading every 49 months. The most recent releases landed on November 6, 2026 and November 11, 2026 respectively.

Scorecard3 real differences · 6 level
Grade Aid versus Centrum School Grading: the parameters behind the verdict, then further details
ParameterGrade AidCentrum School Grading
PriceFreeFree
Rating5.0 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 8 months — betterEvery 49 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.6 — better26.0
Further details — not scored
Size3 MB3 MB
Age rating4+4+
DeveloperEric DievendorfMeranier-Gymnasium Lichtenfels

In-app purchases

1 purchases

Grade Aid

One-time1
  • Full Feature Unlock$2.99
None

Centrum School Grading

No in-app purchases

Questions

Is Grade Aid free?
Grade Aid is free to download, with in-app purchases available.
Is Centrum School Grading free?
Centrum School Grading is free to download, with no in-app purchases.
Do Grade Aid or Centrum School Grading have ads?
Neither Grade Aid nor Centrum School Grading shows ads.
Which is updated more often, Grade Aid or Centrum School Grading?
Grade Aid ships an update every 8 months, and Centrum School Grading every 49 months. Most recently, Grade Aid was updated on November 6, 2026 and Centrum School Grading on November 11, 2026.

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