AI Apps

From idea to real service

NexaLab doesn't stop at the blog. The AI ideas covered here get deployed and operated as real services with real users.

🌱

Harubite

Live

Build your own language habit, one sentence a day β€” start now 🌱

Write and log one sentence in a foreign language every day, and AI polishes your phrasing while each entry builds into your own learning history. Instead of a heavy curriculum, it starts from the smallest possible unit β€” one sentence today β€” to help you build a habit that actually sticks.

Visit β†—
πŸ’°

Paycheck

Live

Enter your salary and instantly see your take-home pay, with state tax rates factored in πŸ’°

Enter your annual salary or hourly wage and this calculator factors in federal tax, state tax, and Social Security to show what you actually take home. It's built for moments like evaluating a job offer or weighing a move to another state, when the gross salary number alone doesn't tell you the real difference in take-home pay.

Visit β†—
πŸ“

TextKit

Live

Word/character counting, case conversion, and live Markdown preview β€” the small text tools you reach for, all in one place πŸ“

A small collection of everyday text utilities β€” character/word counting, case conversion, and a live Markdown preview β€” bundled into one site. It's built so you can handle these little text-formatting tasks instantly, without logging in or searching for yet another one-off tool each time.

Visit β†—
βœ…

EasyPMS

Live

Create a project and it auto-generates a 10-category, ~60-item SI checklist your whole team can share βœ…

Create a project and it instantly builds a practical SI checklist across 10 categories β€” kickoff prep, contract/scope, requirements, design, development, testing, launch/handover, deliverables, closeout/handoff, and risks/issues β€” about 60 items in all. No login required: share a 6-digit code so teammates can jump in right from their phones, track progress by category, and freely add, edit, or remove items to fit each project.

Visit β†—
🧰

Toolbox

Live

Clean up messy JSON/CSV and split or merge PDFs β€” a browser-based utility toolbox 🧰

A utility site bundling a JSON/CSV formatter and a PDF split/merge tool in one place. No sign-up required β€” everything you type or upload is processed entirely in your browser and never sent to or stored on a server.

Visit β†—

Tech I usually build with

Each service is planned and built solo, on top of the stack below.

  • Next.js
  • TypeScript
  • Supabase
  • Vercel
  • Ollama / LLM

What does this category cover?

From model selection and prompt design to deployment, operations, and troubleshooting β€” this is where I record the trial and error behind running real AI apps, including why I made the calls I did. I would rather show what broke and how I fixed it than present a polished success story.