# Serial Killer Murder Library vs SkyChecker

The clearest difference is price: SkyChecker at Free against Serial Killer Murder Library's $3.99. SkyChecker also leads on rating (5.0 vs 4.0) and review sentiment (100% vs 61%). Serial Killer Murder Library's advantage is ratings volume (6 vs 2) and iOS requirement (7.1 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

SkyChecker is free to download; Serial Killer Murder Library costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SkyChecker holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 6 and 2 respectively. Written reviews point the same way: 61% of Serial Killer Murder Library's written reviews are positive against 100% of SkyChecker's.

Serial Killer Murder Library ships an update every 3 months, SkyChecker every 4 weeks. The most recent releases landed on October 12, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Serial Killer Murder Library | SkyChecker |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [4.0 (6 ratings)](https://appshunter.io/ios/app/serial-killer-murder-library/id493094117/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/skychecker/id6757621845/reviews)** |
| Number of ratings | **6** | 2 |
| Positive reviews | 60.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Monetization | Paid | **Free** |
| Size | 22 MB | 3 MB |
| Requires iOS | **7.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Rocket Splash Games](https://appshunter.io/developer/471267937) | [ANDREW DAVID CHAMBERLAIN](https://appshunter.io/developer/1867870098) |

## What reviewers say

### Serial Killer Murder Library

[App page](https://appshunter.io/ios/app/serial-killer-murder-library/id493094117)

Explore a vast collection of information on over 600 serial killers from around the world. Discover their stories, victims, and associated films and TV shows. The app allows sorting by various criteria and sharing content.

**Highlights:** Over 600 serial killers, Information from 50 countries, Over 175 film and TV references, Sort by victims, gender, country, nickname, Share news and content, Browse offline (for killer data)

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

**In-app purchases:** none


### SkyChecker

[App page](https://appshunter.io/ios/app/skychecker/id6757621845)

Identify celestial objects visible from your location with real-time data. Track planets, galaxies, meteor showers, and the ISS. Includes weather integration and planning tools for optimal stargazing.

**Highlights:** Celestial object tracking, Weather integration for viewing conditions, Observation planning tools, Automatic GPS location detection, Retro terminal-style interface, ISS pass tracking, Meteor shower alerts

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Serial Killer Murder Library free?

Serial Killer Murder Library costs $3.99, with no in-app purchases.

### Is SkyChecker free?

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

### Which has better reviews, Serial Killer Murder Library or SkyChecker?

SkyChecker is rated higher. Serial Killer Murder Library averages 4.0 out of 5 from 6 ratings, while SkyChecker averages 5.0 from 2 ratings.

### Do Serial Killer Murder Library or SkyChecker have ads?

Neither Serial Killer Murder Library nor SkyChecker shows ads.

### Which is updated more often, Serial Killer Murder Library or SkyChecker?

Serial Killer Murder Library ships an update every 3 months, and SkyChecker every 4 weeks. Most recently, Serial Killer Murder Library was updated on October 12, 2026 and SkyChecker on September 24, 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.*