# ETH polybox vs exabrain

The clearest difference is in-app purchases: ETH polybox at none against exabrain's 2. exabrain's advantage is update cadence (every 9 days vs every 6 months) and iOS requirement (15.6 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. exabrain sells 2 in-app purchases, starting at $7.99 per month. ETH polybox asks for nothing beyond the download.

ETH polybox ships an update every 6 months, exabrain every 9 days. The most recent releases landed on August 15, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | ETH polybox | exabrain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/eth-polybox/id909475675/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 9 days** |
| Monetization | Free | — |
| Size | 229 MB | 60 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ETH Zurich](https://appshunter.io/developer/438432132) | [exabrainAI GmbH](https://appshunter.io/developer/1712983536) |

## What reviewers say

### ETH polybox

[App page](https://appshunter.io/ios/app/eth-polybox/id909475675)

This app provides secure online data storage and exchange for ETH Zurich members. It functions as a digital storage solution, offering 50 GB of space on campus servers to avoid external storage risks. Sync clients are available for easy access across devices.

**Highlights:** Secure online data storage, Data exchange for ETH members, 50 GB storage space, Avoids external storage, Sync clients for all OS, ETH account required

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

**In-app purchases:** none


### exabrain

[App page](https://appshunter.io/ios/app/exabrain/id6654307456)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| exabrain Pro - Monthly | $7.99 | per month |
| exabrain Pro - Yearly | $59.99 | per year |


## Frequently asked questions

### Is ETH polybox free?

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

### Is exabrain free?

exabrain is free to download, with in-app purchases available.

### Do ETH polybox or exabrain have ads?

Neither ETH polybox nor exabrain shows ads.

### Which is updated more often, ETH polybox or exabrain?

ETH polybox ships an update every 6 months, and exabrain every 9 days. Most recently, ETH polybox was updated on August 15, 2026 and exabrain on September 15, 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.*