# 睡眠ドッグ vs Good Night Lock(screen time)

The clearest difference is in-app purchases: 睡眠ドッグ at none against Good Night Lock(screen time)'s 2. 睡眠ドッグ also leads on update cadence (every 2 weeks vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Good Night Lock(screen time) sells 2 in-app purchases, starting at $4.99 per month. 睡眠ドッグ asks for nothing beyond the download.

睡眠ドッグ ships an update every 2 weeks, Good Night Lock(screen time) monthly. Both last shipped on November 4, 2026.

## The numbers

| Metric | 睡眠ドッグ | Good Night Lock(screen time) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/good-night-lockscreen-time/id6737180308/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | — | Freemium |
| Size | 9 MB | 10 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 9+ | 4+ |
| Developer | [Hayato Kitaoka](https://appshunter.io/developer/1634161426) | [Byunghoon Kang](https://appshunter.io/developer/1719578896) |

## What reviewers say

### 睡眠ドッグ

[App page](https://appshunter.io/ios/app/id6475922311)

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

**In-app purchases:** none


### Good Night Lock(screen time)

[App page](https://appshunter.io/ios/app/good-night-lockscreen-time/id6737180308)

This app helps users establish healthier sleep routines by locking distracting applications during designated sleep hours. It allows for easy setup of bedtime and wake-up times, ensuring only essential apps remain accessible to promote better sleep quality.

**Highlights:** Set bedtime and wake-up times, Lock non-essential apps, Utilizes Screen Time permissions, Reduce screen time, Improve sleep quality, Easy setup

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Yearly | $35.99 | per year |


## Frequently asked questions

### Is 睡眠ドッグ free?

睡眠ドッグ is free to download, with no in-app purchases.

### Is Good Night Lock(screen time) free?

Good Night Lock(screen time) is free to download, with in-app purchases available.

### Do 睡眠ドッグ or Good Night Lock(screen time) have ads?

Neither 睡眠ドッグ nor Good Night Lock(screen time) shows ads.

### Which is updated more often, 睡眠ドッグ or Good Night Lock(screen time)?

睡眠ドッグ ships an update every 2 weeks, and Good Night Lock(screen time) monthly. Most recently, 睡眠ドッグ was updated on November 4, 2026 and Good Night Lock(screen time) on November 4, 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.*