If you're looking for a solid, no-frills brain workout on your phone, IQ Test: Logic Brain Training is a solid pick. It's a pure mobile puzzle game, available for free on both the Google Play Store and the App Store. I downloaded it on my Android device from Google Play, where it has millions of installs. The app itself is free to download and install, and you can play a good chunk of the content without spending a dime. It's supported by in-app ads, which pop up between levels, and there are optional in-app purchases to remove those ads or unlock additional puzzle packs. These packs are usually pretty affordable, often costing a couple of dollars, which is standard for this genre. The game first launched a while back and has been a steady presence in the puzzle section, offering a classic take on IQ-style challenges.

The core gameplay is all about solving a variety of logic puzzles, pattern recognition tests, and math problems against a timer. You don't just tap mindlessly; you really have to think. The best part for me is the sheer variety. One minute you're figuring out a sequence of shapes, the next you're solving a tricky equation or finding the odd one out in a grid. My favorite part is the 'Classic IQ Test' mode, which strings together different puzzle types to give you a final score. It feels like a proper assessment, and trying to beat my own previous score is genuinely addictive. It's the perfect app for a quick 10-minute mental gym session during a commute or a break.

Compared to other popular brain trainers like Peak or Lumosity, IQ Test: Logic Brain Training is much more straightforward and focused. While those other apps often have flashy graphics and gamified progression systems with daily workouts, this app cuts right to the chase: it's you versus the puzzle. It feels less like a curated training program and more like a direct test of your raw logic skills. If you enjoy the puzzle sections of games like Brain Test but wish they were more serious and less about silly humor, this is the app for you. I recommend it over some others because it doesn't try to disguise what it is—a collection of challenging logic puzzles. As a real user, I appreciate that honesty. It's not overloaded with features or a complicated interface; you install the app, open it, and start solving. For puzzle purists who just want to flex their mental muscles without any fluff, this is a great choice on Android or iOS.

• Diverse Puzzle Library 🧩: Unlike some games that focus on one type of brain teaser, this app throws pattern matrices, numerical sequences, verbal analogies, and spatial reasoning problems at you. It keeps the experience fresh and tests different cognitive areas.
• Classic Timed Test Mode ⏱️: This is the standout feature. It mimics a traditional IQ test format, combining various puzzle types into one timed session to generate a single score. It provides a clear, challenging benchmark that games like 'Brain Games & Puzzles' often lack.
• Clean, Distraction-Free Interface 📱: The design is simple and functional. Compared to the sometimes cluttered and overly animated interfaces of apps like MentalUP, this lets you focus entirely on solving the problem in front of you without visual noise.

• Pure, Unadulterated Challenge 🧠: The puzzles themselves are genuinely tough and satisfying to solve. It doesn't hold your hand, offering a more rigorous mental workout than the often easier, more casual puzzles in 'Brain Test: Tricky Puzzles'.
• Great for Quick Sessions ⚡: The level-based structure is perfect for short bursts. You can jump in, solve a few puzzles, and jump out, making it more accessible for on-the-go play than a game requiring a long time commitment.
• Direct Skill Feedback 📊: The instant scoring after each test and the historical score tracking give you clear feedback on your performance. This objective measure of progress is more tangible than the vague 'brain age' metrics in some competitors.

• Intrusive Ad Frequency 📺: The free version is supported by frequent video and interstitial ads between levels. It can really break your flow and is more disruptive than the lighter ad integration seen in similar puzzle apps.
• Limited Thematic Flair 🎨: The visual presentation is very basic and repetitive. If you're coming from a beautifully themed game like 'Monument Valley' (a different genre, but a puzzle standard) or even the more vibrant 'Peak', the aesthetic here can feel sterile and boring.
• Lacks a Cohesive Program 📅: Unlike 'Elevate' or 'Lumosity', which offer structured daily training regimens, this app is more of a puzzle collection. There's no guided path for improvement, which might leave some players feeling directionless.