# OWE vs I.S. 131 Albert Einstein

The clearest difference is update cadence: OWE at every 3 days against I.S. 131 Albert Einstein's every 4 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OWE ships an update every 3 days, I.S. 131 Albert Einstein every 4 weeks. The most recent releases landed on September 19, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | OWE | I.S. 131 Albert Einstein |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 weeks |
| Size | 33 MB | 165 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Victor Alarcon](https://appshunter.io/developer/1540972481) | [Solved Education Consultancy, LLC](https://appshunter.io/developer/1506645558) |

## What reviewers say

### OWE

[App page](https://appshunter.io/ios/app/owe-csa/id6670768115)

**Features:** macOS Compatibility

**In-app purchases:** none


### I.S. 131 Albert Einstein

[App page](https://appshunter.io/ios/app/is-131-albert-einstein/id6756313008)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OWE free?

OWE is free to download, with no in-app purchases.

### Is I.S. 131 Albert Einstein free?

I.S. 131 Albert Einstein is free to download, with no in-app purchases.

### Do OWE or I.S. 131 Albert Einstein have ads?

Neither OWE nor I.S. 131 Albert Einstein shows ads.

### Which is updated more often, OWE or I.S. 131 Albert Einstein?

OWE ships an update every 3 days, and I.S. 131 Albert Einstein every 4 weeks. Most recently, OWE was updated on September 19, 2026 and I.S. 131 Albert Einstein on September 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*