Grade Aid vs Centrum School Grading
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Grade calculation
- Score assignments
- Test scoring
- Target grade verification
- Homeschooling support
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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.
Centrum School Grading
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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
Verdict
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
Both are free to download. Grade Aid sells 1 one-off in-app purchase. Centrum School Grading asks for nothing beyond the download.
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.
| Parameter | Grade Aid | Centrum School Grading |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 8 months — better | Every 49 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 3 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Eric Dievendorf | Meranier-Gymnasium Lichtenfels |
In-app purchases
Grade Aid
- Full Feature Unlock$2.99
Centrum School Grading
No in-app purchases
Questions
Is Grade Aid free?
Is Centrum School Grading free?
Do Grade Aid or Centrum School Grading have ads?
Which is updated more often, Grade Aid or Centrum School Grading?
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