Owlet vs eigenCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Owlet
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Owlet: Cube6 is an app that uses two Owlet CubeTower manipulatives. This app builds on the Cube3 app by enabling students to create six-digit numbers by stacking small cubes in the columns of two CubeTowers. Cube6 has three modes. Each corresponds to a different topic in place value: Thousands, Money, and Decimals. For each topic, there are five different activities. - Explore: Students place cubes in the CubeTowers to create numbers that are shown on the tablet. - Make: Students are prompted to make a target number by placing cubes in the CubeTowers. - Build: Students solve number puzzles. For example, students might be asked to build a number between 200,000 and 300,000 using 15 cubes. - Compare: Students create a number in the CubeTowers and then compare it to a number generated by the app. - Round: Students use the CubeTowers to round a number to a specified place.
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 Owlet's every 5 months. Owlet's advantage is iOS requirement (12.0 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.
Owlet ships an update every 5 months, eigenCalc monthly. The most recent releases landed on June 11, 2026 and September 17, 2026 respectively.
| Parameter | Owlet | eigenCalc |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPad, Mac | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 123 MB | 2 MB |
| Age rating | 4+ | 17+ |
| Developer | BirdBrain Technologies LLC | Luis Acevedo-Arreguin |
In-app purchases
Owlet
No in-app purchases
eigenCalc
No in-app purchases
