ETH polybox vs exabrain
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ETH polybox
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.
- Secure online data storage
- Data exchange for ETH members
- 50 GB storage space
- Avoids external storage
- Sync clients for all OS
- ETH account required
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Note: To use this app an ETH Zurich account is required! The polybox service is used for online data storage and is a safe place for ETH members to exchange data with each other. The polybox service covers the following use case: «polybox – Use it as a logical memory stick – save your data on the ETH campus» As an internal service provider, the ITS System Services (SD) offers all ETH members the service «polybox.ethz.ch» with 50 GB of storage space on the ETH Zurich’s storage facilities. The data stored on the polybox servers are stored on the central storage facilities of the ETH Zurich. Using the service polybox avoids the usage of external (uncontrollable) storage. Sync Clients are provided for an efficient and easy use of the service polybox for all common operating systems (mobile as well as desktop). All ETH members have access to the polybox service. On the first login on «polybox.ethz.ch» with the ETH account, an account with 50 GB of storage is created automatically.
exabrain
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exabrain helps you build the skills that move your career forward through practice that adapts to your learning progress and goals. Explore a course library designed to build career skills, or create custom courses on any subject. Personalize courses to make them even more relevant to your role, interests, and professional goals. Every question adapts to your progress, so you are always practicing the right topic at the right level of difficulty. Get clear feedback that shows what you understand, where you need more work, and what to focus on next. Track your proficiency across every topic and keep improving with practice that is built around you. Download exabrain today! Terms and conditions: https://www.exabrain.ai/terms-and-conditions Privacy policy: https://www.exabrain.ai/privacy-policy
Screenshots
Verdict
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.
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. 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.
| Parameter | ETH polybox | exabrain |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 229 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | ETH Zurich | exabrainAI GmbH |
In-app purchases
ETH polybox
No in-app purchases
exabrain
- exabrain Pro - Monthly$7.991 Month
- exabrain Pro - Yearly$59.991 Year
