Monster Detector: Alien, Ghost is a casual augmented reality game from developer Game Palette that turns your phone into a paranormal investigation tool. Instead of controlling a character or solving puzzles, you walk around your real environment and point your camera at different spots to discover hidden monsters, ghosts, and aliens that appear on screen as if they're actually in the room. The app has been downloaded over a million times on Google Play and is free to install, though it includes optional ads and in-app purchases for extra detector tools. After launching it for the first time, the immediate impression is that it feels more like a toy than a serious game — the colorful radar interface and cartoonish monster designs make it clear this isn't trying to be scary, just entertaining for short bursts of fun.

When you actually start using it, the experience is straightforward. Opening the app presents a radar screen that scans your surroundings, and when something is detected, you tap a button to switch to the camera view. From there, the monster appears overlaid on whatever you're pointing at — your couch, a lamp, your backyard fence. You can take photos of them, collect them in a digital album, and even share the images with friends. The onboarding is quick, just a couple of pop-up tips, and within a minute you're wandering around your house looking for creatures. One small annoyance is that detection can sometimes feel random, especially in dim lighting, and the monsters don't interact much beyond floating there. But for a casual pick-up-and-play session, especially when you're bored or showing it off to someone, it works fine. I found myself checking different rooms just to see what weird thing would appear next.

After spending a few days with it, I think this app is best for kids or anyone who enjoys showing off gimmicky AR experiences to friends. It doesn't have depth — there's no story, no real goal beyond collecting all the creatures — and adults looking for a meaningful game will likely uninstall it after an afternoon. What makes it different from something like Pokémon GO is that it's completely passive; you don't walk to specific locations or battle anything, you just look around your current space. Some people might find that liberating, others will find it boring. I kept it installed because it's harmless fun to pull out at parties, but I can't see myself opening it regularly. It fills a very specific niche: a novelty app that works exactly as advertised, no more, no less.

• 👻 AR monster detection system that places creatures in your real environment through the camera, making each room feel different compared to static games like Pokémon GO where locations are fixed and pre-mapped.
• 👻 Photo capture and sharing feature lets you snap pictures of monsters on your furniture or in your yard, which feels more immediate than the screenshot-based sharing in Ghostbusters World.
• 👻 Simple radar scanning interface requires no movement or exploration, lowering the barrier for casual use compared to location-based AR titles like The Walking Dead: Our World.
• 👻 Collection album tracks all discovered creatures with a progression feel, giving a small sense of completion that apps like Night Terrors lack entirely.

• 👍 Instant setup and play anywhere — you don't need to walk outside or visit specific locations, unlike Pokémon GO which forces you to move around neighborhoods or parks to find anything interesting.
• 👍 No pressure or time commitment — sessions can last thirty seconds and you still feel like you did something, whereas many AR games demand at least five to ten minutes of engagement to feel worthwhile.
• 👍 Child-friendly visuals that are cartoonish instead of creepy, making it more accessible than apps like Haunted House AR that lean into horror and frighten younger users.

• 👎 Very shallow gameplay loop — once you've seen all the monsters, there's nothing new to do, while Pokémon GO keeps players coming back with events, battles, and trading that provide long-term reasons to stay.
• 👎 Detection feels inconsistent and unreliable, especially in low light or cluttered spaces, whereas Ghostbusters World's ghost scanning is more predictable and responsive.
• 👎 No interactivity with the monsters themselves — they just float there, making the experience feel static compared to AR games where you can tap, throw items, or engage with the creatures in some way.