Super Vocabulary Builder vs eigenCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Super Vocabulary Builder
This app helps children expand their English vocabulary with a large preset word list and the ability to add custom words. Parents can track their child's progress and mastery of words through organized worksets. It offers interactive features like pronunciation recording and visual aids for each word.
- Extensive preset word list
- Customizable word sets
- Progress tracking for parents
- Pronunciation recording
- Visual word representation
- Word mastery marking
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A vocabulary builder for kids. The app will make it easy to build up a kid's vocabulary. It will also make it easy for the parent to check how many words a kid has mastered. It has a preset of 6000 most frequently used english words. The user can easily extend the word set. The user can create multiple worksets. By using worksets, the seemingly impossible job will become easy and fun. The user can easily control and check the pace. For each word, the user can record the pronunciation, use images or photos to represent the word, or use the word in a sentence. The user can also mark a word mastered or not mastered. The app will use different colors for mastered and not mastered words.
eigenCalc
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Matrix Calculator that computes eigenvalues and eigenvectors as well as SVD, and that has been tested with 228x228 matrices.
Screenshots
Verdict
The clearest difference is update cadence: eigenCalc at monthly against Super Vocabulary Builder's every 21 months. Super Vocabulary Builder's advantage is iOS requirement (9.0 vs 15.5). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Super Vocabulary Builder ships an update every 21 months, eigenCalc monthly. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.
| Parameter | Super Vocabulary Builder | eigenCalc |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| Update frequency | Every 21 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 76 MB | 2 MB |
| Age rating | 4+ | 17+ |
| Developer | Propersh LLC | Luis Acevedo-Arreguin |
In-app purchases
Super Vocabulary Builder
No in-app purchases
eigenCalc
No in-app purchases
Questions
Is Super Vocabulary Builder free?
Is eigenCalc free?
Do Super Vocabulary Builder or eigenCalc have ads?
Which is updated more often, Super Vocabulary Builder or eigenCalc?
Other comparisons
