# eyeknow vs passNote

The clearest difference is in-app purchases: eyeknow at none against passNote's 1. eyeknow also leads on iOS requirement (11.0 vs 18.0). passNote's advantage is update cadence (every 5 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. passNote sells 1 in-app purchase, starting at $2.99 per month. eyeknow asks for nothing beyond the download.

eyeknow ships an update every 2 months, passNote every 5 days. The most recent releases landed on October 9, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | eyeknow | passNote |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Size | 19 MB | 80 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [TCOM TECHNOLOGY AND COMMUNICATION JOINT STOCK COMPANY](https://appshunter.io/developer/1245632014) | [Ryota Izumi](https://appshunter.io/developer/1773491378) |

## What reviewers say

### eyeknow

[App page](https://appshunter.io/ios/app/eyeknow/id1661959953)

**Features:** macOS Compatibility

**In-app purchases:** none


### passNote

[App page](https://appshunter.io/ios/app/passnote-penpal-diary/id6762535541)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Membership | $2.99 | per month |


## Frequently asked questions

### Is eyeknow free?

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

### Is passNote free?

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

### Do eyeknow or passNote have ads?

Neither eyeknow nor passNote shows ads.

### Which is updated more often, eyeknow or passNote?

eyeknow ships an update every 2 months, and passNote every 5 days. Most recently, eyeknow was updated on October 9, 2026 and passNote on October 5, 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.*