# 해군PTSD알람 vs Empty Classrooms

The clearest difference is price: Empty Classrooms at Free against 해군PTSD알람's $1.99. Empty Classrooms also leads on iOS requirement (16.0 vs 26.6). On ads, in-app purchases and device support there is nothing between them.

Empty Classrooms is free to download; 해군PTSD알람 costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | 해군PTSD알람 | Empty Classrooms |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 91.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 days | — |
| Monetization | Paid | — |
| Size | 177 MB | 13 MB |
| Requires iOS | 26.6 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Dong Chul Lee](https://appshunter.io/developer/1039888951) | [HEEYEON PARK](https://appshunter.io/developer/6804196883) |

## What reviewers say

### 해군PTSD알람

[App page](https://appshunter.io/ios/app/ptsd/id6803308114)

This alarm app is designed to help former navy personnel wake up on time with unique sounds and phrases reminiscent of their training days. It aims to solve the problem of oversleeping and fatigue with special alarm tones.

**Highlights:** Navy basic training wake-up sounds, DI whistle sounds, Mealtime call sounds, Ship deck wake-up calls, Navy anthem, Various training and ship sounds

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

**In-app purchases:** none


### Empty Classrooms

[App page](https://appshunter.io/ios/app/empty-classrooms/id6817383595)

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

**In-app purchases:** none


## Frequently asked questions

### Is 해군PTSD알람 free?

해군PTSD알람 costs $1.99, with no in-app purchases.

### Is Empty Classrooms free?

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

### Do 해군PTSD알람 or Empty Classrooms have ads?

Neither 해군PTSD알람 nor Empty Classrooms shows ads.

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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.*