Spark: Puzzles for the Curious, developed by The Mind Company, is an educational app focused on providing a curated collection of brain teasers and logic puzzles. As part of the Elevate app family, it targets users seeking structured mental stimulation without the clutter of in-app purchases or ads. The app positions itself in a niche where quality and user experience take precedence over monetization strategies, appealing to those tired of disruptive free-to-play models. Core features include a diverse range of puzzle types, such as pattern recognition, spatial reasoning, and word problems, all designed to engage different cognitive domains. The interface supports smooth navigation with visually appealing graphics and intuitive controls. Daily challenges and progress tracking encourage consistent use, while automatic updates ensure users access new content seamlessly. Unlike many competitors, Spark operates entirely without ads or forced video watches, allowing uninterrupted focus on problem-solving. In real-world usage, the app performs well during short breaks or extended sessions, such as during commutes or coffee breaks. Load times are minimal, and the touch-responsive design reduces frustration during puzzle input. Users appreciate the cohesive visual theme, which avoids overwhelming colors or distracting elements. However, some may find the puzzle difficulty progression uneven in certain categories, requiring occasional adjustments in strategy. User feedback consistently highlights the ad-free environment and polished visuals. Reviews indicate a 4.8/5 rating, with many praising the lack of pop-ups and the refreshing approach to mobile gaming. One representative comment notes, 'Amazing visuals and genuinely no ads, no pop-ups, no watching necessary to advance,' though the same review expresses a wish for unlimited playtime, suggesting content availability could feel restricted for avid users. This minor critique points to a potential area for expansion in future updates. Overall, Spark excels in delivering a focused, educational tool with strong production values. Its main limitation lies in the desire for more expansive content, as echoed by some users. For puzzle enthusiasts valuing an undisturbed experience, it represents a reliable choice, though those seeking endless variety might need supplemental apps.