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Moat or Bloat

Day 76 Calculator App

A React and TypeScript calculator app with theme toggle and responsive design

Web app Rated 7 Oct 2026Dormant

Link
day-76-calculator-app.vercel.app
Built by
Dev Nerd

Bloat

71/500

Where it landed on the scale

Bloat
0
Float
300
Moat
400

Summary

This is a practice project from a coding challenge, based on a Frontend Mentor design. It is live and works as a calculator, but it has no business model, no backend, and nothing that would keep someone from rebuilding it in an afternoon. It was posted once and has not been touched since January 2025.

Bloat · Not much here works or looks likely to last, yet.

Breakdown

Five measures, 100 points each. Open the receipts under any of them to see the posts and pages behind the points.

Viability

Is there a real problem, someone who would pay, and a market this builder can actually reach?

A learning exercise with no identified user or payer; calculators are free and built into every device.

4/100

Rubric 0–20No clear problem or user. A toy, a practice clone, or a solution looking for a problem.

Receipts (2)

  1. Presented as Day 76 of a #100DaysOfCode challenge, i.e. a practice project, not a product for a defined user.

    “#Day76 of #100DaysOfCode challenge After a week off to organize my stuffs I'm back 🔥😎🤟 This time it's a nice calculator app built with React and TypeScript🔥 ⚡️ Features: ✅ Dope functionality ✅ Theme toggle with 3 cool color options ✅ Powerful error handling ✅ 100% responsive design ✅ Modern design with bouncing buttons when the user clicks ✅ Amazing performance Check it out ⚡️👍 Li”

    Post · @DevNerd0 · 8 Jan 2025 · open on Telegram (opens in a new tab)

  2. The page title is 'Frontend Mentor | Calculator app', pointing to a design-challenge template; the dossier shows no pricing, payments or accounts.

    Checked 7 Oct 2026 · day-76-calculator-app.vercel.app (opens in a new tab)

Moat

What stops someone copying it?

A standard calculator clone that anyone in this scene could rebuild in a weekend; there is no local depth, data, or distribution.

2/100

Rubric 0–20A thin wrapper or a clone that anyone here could rebuild in a weekend.

Receipts (2)

  1. The page is a Frontend Mentor calculator challenge with no accounts, data or integrations.

    Checked 7 Oct 2026 · day-76-calculator-app.vercel.app (opens in a new tab)

  2. The listed features (theme toggle, responsive layout, button animation) are all easy to copy.

    “#Day76 of #100DaysOfCode challenge After a week off to organize my stuffs I'm back 🔥😎🤟 This time it's a nice calculator app built with React and TypeScript🔥 ⚡️ Features: ✅ Dope functionality ✅ Theme toggle with 3 cool color options ✅ Powerful error handling ✅ 100% responsive design ✅ Modern design with bouncing buttons when the user clicks ✅ Amazing performance Check it out ⚡️👍 Li”

    Post · @DevNerd0 · 8 Jan 2025 · open on Telegram (opens in a new tab)

Momentum

Did the updates keep coming?

Shipped once, on 2025-01-08, with no updates in the 636 days since; there is no sign of ongoing development.

0/100

  • Sustained shipping0/60

    Worked on across 0 days.

  • Consistency0/40

    Updates in 1 of 1 month.

  • Quiet

    No update for 636 days — scaled to 20%.

Receipts (1)

  1. Earliest post about it.

    “#Day76 of #100DaysOfCode challenge After a week off to organize my stuffs I'm back 🔥😎🤟 This time it's a nice calculator app built with React and TypeScript🔥 ⚡️ Features: ✅ Dope functionality ✅ Theme toggle with 3 cool color options ✅ Powerful error handling ✅ 100% responsive design ✅ Modern design with bouncing buttons when the user clicks ✅ Amazing performance Check it out ⚡️👍 Li”

    Post · @DevNerd0 · 8 Jan 2025 · open on Telegram (opens in a new tab)

Infrastructure

Does a real, working product exist?

A working static calculator is live on a free Vercel subdomain, but there is no backend, accounts, docs or any operational layer.

51/100

  • It's live20/20

    https://day-76-calculator-app.vercel.app/ responded when checked.

  • HTTPS5/5

    Served over HTTPS.

  • Real product25/35

    The live site loads and the post describes a working calculator with a theme toggle and error handling. It is a single-purpose, thin app, though, and the snapshot text was empty, so I could not verify behaviour beyond the claims.

  • Own home0/10

    Only on a free subdomain or link-in-bio page.

  • Maintained0/15

    Last sign of shipping 2025-01-08.

  • Operations1/15

    Only a static Vercel deployment and a linked code repo. There are no accounts, backend, docs, API or status page.

Receipts (5)

  1. https://day-76-calculator-app.vercel.app/ responded when checked.

    Checked 7 Oct 2026 · day-76-calculator-app.vercel.app (opens in a new tab)

  2. The page was fetched successfully and is live over HTTPS.

    Checked 7 Oct 2026 · day-76-calculator-app.vercel.app (opens in a new tab)

  3. Claims a working calculator with three themes, error handling and responsive design.

    “#Day76 of #100DaysOfCode challenge After a week off to organize my stuffs I'm back 🔥😎🤟 This time it's a nice calculator app built with React and TypeScript🔥 ⚡️ Features: ✅ Dope functionality ✅ Theme toggle with 3 cool color options ✅ Powerful error handling ✅ 100% responsive design ✅ Modern design with bouncing buttons when the user clicks ✅ Amazing performance Check it out ⚡️👍 Li”

    Post · @DevNerd0 · 8 Jan 2025 · open on Telegram (opens in a new tab)

  4. Facts show accounts false, docs false, status_page false, and a free host.

    Checked 7 Oct 2026 · day-76-calculator-app.vercel.app (opens in a new tab)

  5. The post links a repo, which is the only sign of any process.

    “#Day76 of #100DaysOfCode challenge After a week off to organize my stuffs I'm back 🔥😎🤟 This time it's a nice calculator app built with React and TypeScript🔥 ⚡️ Features: ✅ Dope functionality ✅ Theme toggle with 3 cool color options ✅ Powerful error handling ✅ 100% responsive design ✅ Modern design with bouncing buttons when the user clicks ✅ Amazing performance Check it out ⚡️👍 Li”

    Post · @DevNerd0 · 8 Jan 2025 · open on Telegram (opens in a new tab)

Sustainability

Is it being set up to last?

A practice project with no revenue, no pricing, no distribution beyond a free subdomain, and no commitment beyond one challenge-day post.

14/100

  • Distribution12/30

    A site on a free subdomain.

  • Payments0/15

    No payment provider found.

  • Pricing0/10

    No pricing found on the site.

  • Revenue0/5

    No paying customers or revenue are mentioned, and no payment provider or pricing exists.

  • Privacy policy0/7

    No privacy policy found.

  • Terms0/5

    No terms of service found.

  • Support0/8

    No support contact found.

  • Commitment2/20

    The project is one entry in a personal daily-coding streak. It has no team, roadmap, dedicated channel or funding, and there has been no activity since the single post.

Receipts (4)

  1. A site on a free subdomain.

    Checked 7 Oct 2026 · day-76-calculator-app.vercel.app (opens in a new tab)

  2. The snapshot shows payments empty, prices false, and no pricing page.

    Checked 7 Oct 2026 · day-76-calculator-app.vercel.app (opens in a new tab)

  3. A single post that is part of a general challenge series, not a dedicated project.

    “#Day76 of #100DaysOfCode challenge After a week off to organize my stuffs I'm back 🔥😎🤟 This time it's a nice calculator app built with React and TypeScript🔥 ⚡️ Features: ✅ Dope functionality ✅ Theme toggle with 3 cool color options ✅ Powerful error handling ✅ 100% responsive design ✅ Modern design with bouncing buttons when the user clicks ✅ Amazing performance Check it out ⚡️👍 Li”

    Post · @DevNerd0 · 8 Jan 2025 · open on Telegram (opens in a new tab)

  4. Nothing in the page points to a community, roadmap or team.

    Checked 7 Oct 2026 · day-76-calculator-app.vercel.app (opens in a new tab)