Monstrometer vs XenoSignal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Monstrometer
This app helps you identify and understand supernatural beings. It uses biometric scans and questions to assess if someone is a disguised creature like a zombie or vampire, and offers survival tips and videos.
- Biometric finger scan for creature identification
- Psychometric questions to assess supernatural probability
- Survival videos for various creatures
- Tips for dealing with supernatural beings
- Social game for tricking friends
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Use The Seth On Survival Monstrometer to scan and interrogate old friends and new acquaintances to determine if they are really supernatural beings in disguise and then learn how to deal with them. You can even scan yourself and link with others who share your supernatural condition. The Monstrometer uses a biometric finger scan and a battery of psychometric questions to determine the probability that your subject could actually be a zombie, vampire, werewolf, leprechaun or other dangerous supernatural creature. Recommended for anyone who has ever wondered, if I ask for her number will she just sink her pretty teeth into my carotid artery and suck out all my blood? And why is my friend acting so weird? The Monstrometer has been updated regularly with new information and results and now you can even watch survival videos with werewolves, zombies and leprechauns right from within the app with even more new videos coming soon. On the SOS website you'll find Monstometer tips to help ensure your survival. (Also some cheats to trick your friends!) Developed by supernatural survivalist Seth Greening, host of web series Seth On Survival and the upcoming Monstrometer Report and the online home of supernatural survival http://www.sethonsurvival.com Knowledge is power. Less power than a functioning particle cannon, true, but still. Don’t be caught unprepared! A fun social game and important survival tool.
XenoSignal
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Explore the Unknown. Decode the Unseen. XenoSignal is your personal gateway to the universe’s most mysterious extraterrestrial life and knowledge. Crafted for curious minds and alien enthusiasts, this sci-fi-inspired encyclopedia blends science, imagination, and style — all in a compact app that works anywhere, anytime. Key Features Alien Profiles – Explore detailed dossiers on alien species, civilizations, and their strange worlds. Field Notes Format – Simple, easy-to-read entries designed like classified research logs. Offline Access – No internet needed after download. Study alien life on the go. Immersive Interface – Sleek design that feels like a futuristic scanner from another world. Interactive Immersion – Battery power simulation, data loaders, and more for that “mission control” vibe. Whether you’re a sci-fi dreamer or a deep-space researcher at heart, XenoSignal turns your device into an interstellar knowledge terminal. Download now and start your journey across the stars.
Screenshots
Verdict
The clearest difference is in-app purchases: Monstrometer at none against XenoSignal's 4. Monstrometer also leads on ads (none vs shown) and iOS requirement (9.0 vs 13.0). On price, update cadence 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
Both are free to download. XenoSignal sells 4 one-off in-app purchases. Monstrometer asks for nothing beyond the download.
Monstrometer ships an update every 3 months, XenoSignal every 2 months. The most recent releases landed on October 16, 2026 and September 24, 2026 respectively.
| Parameter | Monstrometer | XenoSignal |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (9 ratings) — better | — |
| Positive reviews | 71.1% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 51 MB | 62 MB |
| Age rating | 4+ | 4+ |
| Developer | T3 Digital Productions | ADAVII (PVT) LTD |
Bugs and requests
Monstrometer
Reported bugs
15 issues- Crashes frequently
- Keeps crashing
- Crashes every time
- Force closes
- Bug that makes the app crash and delete data
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- Buggy
- Keeps closing itself
- Doesn't save stats or monsters
- Crashes in the middle of the quiz
- Crashes every 10 seconds
- Crashes way too many times
- Can't answer questions due to crashing
- Keeps crashing on the 5th question
- Constantly crashing when trying to log in
- Crashes on me
Requested features
10 requests- Update the app on the AppStore
- Add sound effects
- Make human a result option
- Add unicorn and pegasus monsters
- Show most common answer and past quizzes
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- List results and near misses
- Make monster sounds
- Create more apps
- Monster database
- Cool monster pictures for wallpaper
XenoSignal
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Monstrometer
No in-app purchases
XenoSignal
- Recharge Battery$0.99
- Gain Signal$0.99
- Donate to the Developer$0.99
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- Remove Ads$7.99









