I built a fast, no-BS tip calculator (Next.js, no backend)

Source: Dev.to

What it does

• Instant tip calculation (10–25% or custom)
• Split bills between friends (up to 20 people)
• Round‑up per person (clean numbers)
• Pre‑tax / post‑tax tip toggle
• Copy results in one click

Also includes a currency converter for quick travel use.

Tech stack

• Next.js 16 (App Router)
• React 19
• Tailwind v4
• TypeScript (strict)

No backend. No database. Just fast client‑side logic.

Why I built it

Most tip calculators are:

• Slow
• Full of ads/pop‑ups
• Badly designed

This one is optimized for speed + UX.

Would love your feedback 🙌
What would you improve?