Alien Motion Detector vs Not From Earth
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Alien Motion Detector
This app is for entertainment purposes only, simulating alien detection. Users can place and interact with virtual aliens on their screen, watching them move and react. It utilizes device gyroscopes for an interactive experience.
- Simulated alien motion detection
- Place and draw virtual aliens
- Aliens swarm to your location
- Adjust alien behavior (count, speed, lifetime)
- Gyroscope-controlled interaction
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Disclaimer: This app is intended for entertainment purposes only and does not provide true motion tracking functionality. Track and detect aliens all around you! just start the application and place your aliens on the screen by tapping or drawing them to see and hear them. The aliens will automatically start to swarm onto your location. The latest update now comes with extra configurations to change how you want the aliens on the screen to behave including how many, speed and lifetime. Alien Motion Detector is fully controlled by the gyroscopes and requires that you have this present in the device you are using. Follow our Twitter @kmonkeyblog
Not From Earth
Transform photos of people into aliens with a variety of effects and backgrounds. Share your alien discoveries with friends and family, complete with a certificate of discovery. Enjoy free updates and no advertisements.
- Alien photo transformation
- Hundreds of free effects
- Backgrounds included
- Shareable discovery certificates
- Free lifetime updates
- No ads or addons
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Finally, a way for Terrans to detect Aliens from other worlds that walk among us. Simply take a snapshot or use exiting photos of someone that you suspect of being from another world and turn them into an alien. Share the discovery with your friends and family. A certificate of discovery is provided for sharing and exposing the culprit. Hundreds of free effects and backgrounds. Free Updates for life. No Ads. No Addons needed.
Screenshots
Verdict
The clearest difference is rating: Not From Earth at 5.0 against Alien Motion Detector's 3.9. Alien Motion Detector's advantage is monetization model (free vs paid) and update cadence (every 6 weeks vs every 6 months). On price, 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
Alien Motion Detector costs $1.99 and Not From Earth $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Not From Earth holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Alien Motion Detector has 31 ratings behind it against 2, so its average is the more settled of the two.
Alien Motion Detector ships an update every 6 weeks, Not From Earth every 6 months. The most recent releases landed on October 26, 2026 and October 20, 2026 respectively.
| Parameter | Alien Motion Detector | Not From Earth |
|---|---|---|
| Price | $1.99 | $1.99 |
| Rating | 3.9 (31 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 66.2% of reviews | — |
| Number of ratings | 31 — better | 2 |
| Update frequency | Every 6 weeks — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 10.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 30 MB | 502 MB |
| Age rating | 4+ | 4+ |
| Developer | Joey To | XMLAuthor Inc |
Customer experience
Alien Motion Detector
Not From Earth
Bugs and requests
Alien Motion Detector
Reported bugs
10 issues- No audio/sound
- Won't add to watch screen
- Placing aliens on screen not working
- Can't add beeping sound
- Doesn't work on iPhone XS Max
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- Doesn't work with detecting motion on iPhone X
- Can't activate monster signals on iPhone XS
- No sound through speakers
- Shows where fingers have been
- New version pulse timing and sounds are off
Requested features
9 requests- Auto-generated movement setting
- Add Bluetooth detection for friends
- Integrate with location services
- Record feature
- Higher pitch sound as aliens get closer
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- Randomly generate dots
- Drag dots around
- Update for latest phones
- Add M4A1 pulse rifle app
Not From Earth
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Alien Motion Detector
No in-app purchases
Not From Earth
No in-app purchases
Questions
Is Alien Motion Detector free?
Is Not From Earth free?
Which has better reviews, Alien Motion Detector or Not From Earth?
Do Alien Motion Detector or Not From Earth have ads?
Which is updated more often, Alien Motion Detector or Not From Earth?
Other comparisons
