ScreenKiller vs Planet Gravity
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ScreenKiller
This app uses your device's screen to create startling effects when touched or shaken. Customize the scares with your own images, sounds, and videos for personalized pranks.
- Screen shattering effect
- Scary sound effects
- Shake to trigger boar animation
- Customizable images and sounds
- Personalized video and picture integration
- Setup options for customization
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Tired of guys touching your device? S C A R E your loved ones, have fun!! - If someone touches your screen, the screen ´shatters´ with a 'sing-a-ling' and a you will show up with a very scary sound on the broken screen! - If someone shake the screen and an angry wild boar with a VERY scary sound shows up! - You can insert your heartbreaker with soft and romantic sound. - You are free to give some loving words to the one you love if she/he touch the screen... - You choose just what you want in Setup - Click 'Front' to choose your own favorite screen picture or take a screenshot of just what you want to have in front.) - Press ´Setup´ and put in your own videos, pictures and voices to make it very personal. Example of other videos/sounds when the glass 'shatters': "Yesss! Now you have to buy me a new iPhone!" ...or take i.e. a photo of a lion face and let the children make the sound. I guarantee you a lot of laughter! ;-) Please send comments/questions to my email: screenkilleren@gmail.com
Planet Gravity
Explore the gravitational pull of different celestial bodies. Watch pendulums swing and collide under varying gravitational forces, offering a unique physics simulation experience.
- Select different planets for unique gravity
- Observe pendulum collisions
- Physics-based simulation
- Educational planet facts
- Interactive entertainment
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Planet Gravity isn't just about gravity anymore. Select a planet to get a scrolling fact about that planet on the display. This app is a twist on the Newton’s cradle balance balls. The pendulum balls collide just like the real set and you can select other planets to use that planet’s gravity. How does the pendulum swing with different gravity? Even the Sun has gravity - see what it does to the motion of the pendulums (well they'd probably melt but you get the idea.....)
Screenshots
Verdict
The clearest difference is in-app purchases: Planet Gravity at none against ScreenKiller's 1. ScreenKiller's advantage is update cadence (every 3 months vs every 14 months). On price, ads, device support and iOS requirement 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
Both are free to download. ScreenKiller sells 1 one-off in-app purchase. Planet Gravity asks for nothing beyond the download.
ScreenKiller ships an update every 3 months, Planet Gravity every 14 months. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.
| Parameter | ScreenKiller | Planet Gravity |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | — | 25.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months — better | Every 14 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 35 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Vigleik Steinar Voll | Niagara Mobile LLC |
Customer experience
ScreenKiller
Planet Gravity
In-app purchases
ScreenKiller
- Unlock ScreenKiller$0.49
Planet Gravity
No in-app purchases
Questions
Is ScreenKiller free?
Is Planet Gravity free?
Do ScreenKiller or Planet Gravity have ads?
Which is updated more often, ScreenKiller or Planet Gravity?
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