# passNote vs 15 seconds

The clearest difference is in-app purchases: 15 seconds at none against passNote's 1. 15 seconds also leads on iOS requirement (15.0 vs 18.0). passNote's advantage is ads (none vs shown). On price, update cadence 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. 15 seconds asks for nothing beyond the download.

passNote ships an update every 5 days, 15 seconds every 3 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | passNote | 15 seconds |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 days | **Every 3 days** |
| Size | 80 MB | 32 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Ryota Izumi](https://appshunter.io/developer/1773491378) | [Marco Cotone](https://appshunter.io/developer/1892402713) |

## What reviewers say

### 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 |


### 15 seconds

[App page](https://appshunter.io/ios/app/15-seconds-social/id6799385850)

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

**In-app purchases:** none


## Frequently asked questions

### Is passNote free?

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

### Is 15 seconds free?

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

### Do passNote or 15 seconds have ads?

15 seconds shows ads; passNote does not.

### Which is updated more often, passNote or 15 seconds?

passNote ships an update every 5 days, and 15 seconds every 3 days. Most recently, passNote was updated on October 28, 2026 and 15 seconds on October 31, 2026.

---

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