# TRAPP Diffuser vs Senior Year Chronicle

The clearest difference is update cadence: Senior Year Chronicle at every 10 days against TRAPP Diffuser's every 12 months. TRAPP Diffuser's advantage is iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

TRAPP Diffuser ships an update every 12 months, Senior Year Chronicle every 10 days. The most recent releases landed on October 2, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | TRAPP Diffuser | Senior Year Chronicle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 10 days** |
| Size | 173 MB | 2 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dongguan Yih-Teh Electric Products Co., Ltd.](https://appshunter.io/developer/1604523226) | [WYCO VENTURES GROUP LLC](https://appshunter.io/developer/6780310636) |

## What reviewers say

### TRAPP Diffuser

[App page](https://appshunter.io/ios/app/trapp-diffuser/id1604523223)

**Features:** macOS Compatibility

**In-app purchases:** none


### Senior Year Chronicle

[App page](https://appshunter.io/ios/app/senior-year-chronicle/id6780310634)

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

**In-app purchases:** none


## Frequently asked questions

### Is TRAPP Diffuser free?

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

### Is Senior Year Chronicle free?

Senior Year Chronicle is free to download, with no in-app purchases.

### Do TRAPP Diffuser or Senior Year Chronicle have ads?

Neither TRAPP Diffuser nor Senior Year Chronicle shows ads.

### Which is updated more often, TRAPP Diffuser or Senior Year Chronicle?

TRAPP Diffuser ships an update every 12 months, and Senior Year Chronicle every 10 days. Most recently, TRAPP Diffuser was updated on October 2, 2026 and Senior Year Chronicle on October 11, 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.*