# Good Night System vs Vibration Detect II

The clearest difference is price: Good Night System at Free against Vibration Detect II's $9.99. Good Night System also leads on update cadence (every 6 months vs every 28 months) and iOS requirement (8.0 vs 11.0). On ads, in-app purchases and device support there is nothing between them.

Good Night System is free to download; Vibration Detect II costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Good Night System ships an update every 6 months, Vibration Detect II every 28 months. The most recent releases landed on October 23, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Good Night System | Vibration Detect II |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/good-night-system/id646945920/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 28 months |
| Monetization | Free | — |
| Size | 19 MB | 11 MB |
| Requires iOS | **8.0** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lunatico Astronomia S. L.](https://appshunter.io/developer/571006483) | [Anders Falck](https://appshunter.io/developer/941097539) |

## What reviewers say

### Good Night System

[App page](https://appshunter.io/ios/app/good-night-system/id646945920)

This iOS companion app monitors your observatory while you sleep. It will alert you via your iPhone if any issues arise, ensuring peace of mind for astronomers. A free PC application is also available for download.

**Highlights:** Observatory monitoring, Sleep-time alerts, iPhone wake-up notifications, Companion iOS app, Free PC application available

**Features:** macOS Compatibility

**In-app purchases:** none


### Vibration Detect II

[App page](https://appshunter.io/ios/app/vibration-detect-ii/id1520170942)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Good Night System free?

Good Night System is free to download, with no in-app purchases.

### Is Vibration Detect II free?

Vibration Detect II costs $9.99, with no in-app purchases.

### Do Good Night System or Vibration Detect II have ads?

Neither Good Night System nor Vibration Detect II shows ads.

### Which is updated more often, Good Night System or Vibration Detect II?

Good Night System ships an update every 6 months, and Vibration Detect II every 28 months. Most recently, Good Night System was updated on October 23, 2026 and Vibration Detect II on October 19, 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.*