LogicPuzzle Daily

Inspiration

I’ve always loved quick brain teasers but struggled to build a consistent habit—most apps required accounts, had endless ads, or felt overwhelming. Watching friends and family skip daily mental exercise for the same reasons, I set out to build something simple: a no-fuss, daily logic puzzle app that fits into a busy schedule, no strings attached.

What it does

LogicPuzzle Daily delivers one curated puzzle (Sudoku, logical grid reasoning, or spatial thinking) each day, synced to your local timezone. It tracks streaks, offers progressive hints (no direct answers!), and walks you through solutions step-by-step. Free tier has minimal ads; premium unlocks ad-free access and bonus puzzles.

How we built it

I started with core UX design in Figma, focusing on simplicity (no login screens!). Using HTML5/CSS3 (TailwindCSS) for responsive design, React for interactive puzzle grids, and LocalStorage to save streaks/progress locally. Stripe API integrated premium subscriptions, and date-fns ensured daily puzzle refreshes aligned with local midnight.

Challenges we ran into

Syncing puzzle refresh to diverse timezones was tricky—we had to avoid "midnight" bugs for users across Europe/North America. Also, balancing hint clarity (guidance, not answers) took dozens of iterations to get right. LocalStorage data loss (cache clears) required a graceful reset flow with clear user messaging.

Accomplishments that we're proud of

The streak system drives consistent use—users hit 7/30/100-day milestones with fun visual celebrations. The responsive design works seamlessly on both desktop (home/office) and mobile (on-the-go), and the hint system feels helpful, not patronizing.

What we learned

Building for "micro-habits" means prioritizing speed and simplicity over features—every extra click or screen was cut. Local storage limitations taught me to design resilient data flows, and user testing with casual puzzle fans highlighted how critical ad placement (non-intrusive!) is for free-tier satisfaction.

What's next for this project

We’re adding a bonus puzzle library (1000+ puzzles) for premium users, refining the Expert+ difficulty tier, and testing offline support for longer. Eventually, we’ll explore subtle accessibility tweaks (per web standards) and lightweight progress export tools—all while keeping the core "no account, instant play" promise intact.

Built With

• figma
• localstorage
• stripe
• tailwindcss
• vercel