# ZeroEyes vs ChemNotes

The clearest difference is iOS requirement: ZeroEyes at 15.6 against ChemNotes's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on November 13, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | ZeroEyes | ChemNotes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (8 ratings)](https://appshunter.io/ios/app/zeroeyes/id1532649224/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 64.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free | — |
| Size | 82 MB | 4 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [OHRAE Inc.](https://appshunter.io/developer/1161656350) | [SOROOSH GHAREHGOZLO](https://appshunter.io/developer/1851464333) |

## What reviewers say

### ZeroEyes

[App page](https://appshunter.io/ios/app/zeroeyes/id1532649224)

Manage membership passes for study cafes and shared offices. Check real-time seat availability, purchase passes, and reserve study rooms from anywhere. Features include QR code check-in/out and payment options.

**Highlights:** Real-time seat availability check, Pass purchase and extension, Study room reservations, QR code check-in/out, Guardian alerts, Multiple payment options

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

**In-app purchases:** none


### ChemNotes

[App page](https://appshunter.io/ios/app/chemnotes/id6755041959)

**In-app purchases:** none


## Frequently asked questions

### Is ZeroEyes free?

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

### Is ChemNotes free?

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

### Do ZeroEyes or ChemNotes have ads?

Neither ZeroEyes nor ChemNotes shows ads.

### Which is updated more often, ZeroEyes or ChemNotes?

ZeroEyes ships an update every 2 weeks, and ChemNotes every 2 weeks. Most recently, ZeroEyes was updated on November 13, 2026 and ChemNotes on November 9, 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.*