Serial Killer Murder Library vs Overpopulation
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Serial Killer Murder Library
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.
- 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)
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"This app is by FAR the BEST serial killer app hands down!" - serialkillersink.net Do you have a taste for the disturbed? Do you love the psychology of the sociopath? Every serial killer you could imagine can now be in the palm of your hand. From Bundy to Dahmer, with every killer in between, browse over 600 serial killers throughout history. 5 Stars "Well organized. Great interface. Beats anything online." - by Adrizzzz 5 Stars "Phenomenally insightful and responsible application for this genre." -AnthonyMeoli Who had the most victims? Want to see only female killers? Who was the "Acid Bath Murderer" or who was known as "Alligator Man". Browse over 175 films and TV shows based on serial killers. Discover video you had never heard of. - Share the latest serial killer news - Over 600 killers from 50 countries - Over 175 film/tv references - Sort by number of victims, gender, country and nickname - Share anything on Facebook, Twitter, Email, Camera Roll If you love this app, please take the time to rate it and help spread the word! * Internet connection required to load images. However, you will still be able to browse killers without a connection Attribution for App Previews: "Evening of Chaos" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/
Overpopulation
Explore global population dynamics with interactive data on current and future overpopulation scenarios for every country. Understand sustainable population limits based on ecological footprints and biocapacity, and discover humane solutions.
- Interactive population overshoot display
- Current and future population scenarios
- Sustainable population size calculations
- Ecological Footprint and Biocapacity ratios
- Humane overpopulation solutions per country
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This app interactively displays the exact overshoot in the current and future population sizes of all countries under different scenarios. The goal of this app is to warn people of the present and coming danger of overpopulation with recent scientific data. It also presents humane solutions to overpopulation for each country. The sustainable population sizes indicated in this app are the maximum amount of people that could live sustainably in a country for an extended period of time without exploiting other countries. These population sizes are calculated using the ratio between the Ecological Footprint and the Biocapacity of all countries in the world.
Screenshots
Verdict
The clearest difference is price: Overpopulation at Free against Serial Killer Murder Library's $3.99. Overpopulation also leads on review sentiment (100% vs 61%) and rating (4.5 vs 4.0). Serial Killer Murder Library's advantage is update cadence (every 3 months vs every 7 months) and iOS requirement (7.1 vs 13.0). On ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Overpopulation 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.
Overpopulation holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: Overpopulation has 47 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 61% of Serial Killer Murder Library's written reviews are positive against 100% of Overpopulation's.
Serial Killer Murder Library ships an update every 3 months, Overpopulation every 7 months. The most recent releases landed on September 26, 2026 and September 14, 2026 respectively.
| Parameter | Serial Killer Murder Library | Overpopulation |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.0 (6 ratings) | 4.5 (47 ratings) — better |
| Positive reviews | 60.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 6 | 47 — better |
| Update frequency | Every 3 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 7.1 — better | 13.0 |
| Further details — not scored | ||
| Size | 22 MB | 30 MB |
| Age rating | 17+ | 4+ |
| Developer | Rocket Splash Games | Jasper Eikelboom |
Customer experience
Serial Killer Murder Library
Overpopulation
In-app purchases
Serial Killer Murder Library
No in-app purchases
Overpopulation
No in-app purchases






