kelldev.ai

from $100 · web, mobile, or both · 24 hours

Your app or business idea,
a working demo in 24 hours.

Send us a paragraph about the app or business idea you have in your head. We send back something real you can click, install, and show people. One hundred dollars.

What you send

“A booking app for my mobile detailing business. Customers pick a car size and a time slot, pay a deposit, and I get the job on a calendar. Mobile, ideally.”

— one paragraph

What you get back

— a working app to test on your phone, a working web app to test online, or both

Three steps, and only one of them is yours

01

Send the brief

A paragraph is enough. What the app or business is, who it's for, and the one thing it has to do. No spec, no wireframes, no meetings. Tell us more and more comes back built: more details mean more features in the demo.

02

We build it

Real software, not a clickable mockup. Screens that navigate, forms that submit, data that persists: the parts people actually poke at. AI agents do the building, steered and reviewed by us: that loop is why it takes a day and not a month.

03

You get a link

Within 24 hours. A live URL for web, or a build you can install on a phone. Send it to an investor, a customer, or your co-founder.

What a hundred dollars gets you

Working demo

Not a Figma file and not a slideshow. Buttons do things. If it looks like it should work, it works, on your device.

Web, mobile, or both

A responsive web app at a real URL, or a mobile app you can install and hand to someone across a table. Take both for $175.

Deployed for you

Hosting, domain, and SSL are handled. There is nothing to set up on your end and nothing to run locally.

24-hour turnaround

From the moment the brief lands. Most demos come back sooner. You'll know the delivery window before you pay.

Web, mobile, or both?

Not sure which? Pick the closest and say so in the brief.

Mobile app demo

$100flat

  • One web or mobile app demo
  • Built from a one-paragraph brief
  • Deployed to a live URL you can share
  • Delivered within 24 hours

Tell us what you want built and we’ll confirm scope before you pay.

And if you like it

Then we ship it, and it keeps changing

Most demos are where the idea dies: a link that rots in a thread. If yours is worth keeping, it goes on a monthly plan instead. We take it to production, and from there you send feedback the same way you sent the brief and it gets built.

Talk about the monthly plan

The release is included

Going live is part of the plan, not a separate invoice: a proper domain, real accounts, real payments, and the parts a demo is allowed to fake built out for good.

Feedback is still a paragraph

Send a note the way you sent the brief. AI agents pick it up, make the change, and put it in front of you: no tickets to file, no sprint to wait for, no meeting to schedule it.

We keep it running

Hosting, deploys, backups, updates, and the 2am things nobody wants to own. You never get handed a server and a login.

You don’t get a number until you’re satisfied with the speed and the quality. Then the monthly rate is worked out from what you actually need, and because the loop runs on AI rather than a bench of developers, it lands a lot closer to a subscription than to a contractor.

For engineering teams

Already have developers? Make them move like ten.

The other half of what we do. We put AI into the way your engineers actually work: not a licence you hand out and hope someone uses, but agents plugged into your repositories, your tickets, and your review process, doing the work that keeps sliding down the list. The goal is blunt: ten times the output from the developers you already have.

Agents inside the workflow

Wired into your repos, your tickets, and your CI: taking work off the board, opening pull requests, and answering to a red build. Not another chat tab your engineers forget to open.

Your stack, your infrastructure

It runs where your code already lives, under your keys and your review rules. Nothing gets shipped off to someone else's platform to be read.

The backlog nobody reaches

Migrations, test coverage, dependency bumps, the tickets carried over every sprint. The tier of work that's real but never wins the priority argument.

Any team, any size

Two developers or two hundred. A solo founder with a codebase, a startup team, or a department inside something much larger: the work is the same shape at every size, only the rollout changes.

Built around your team

Nothing off the shelf. We look at your codebase, your review culture, and what the business actually needs shipped this quarter, then build the setup around that.

Your developers, trained

Your engineers learn to drive this themselves: how to brief an agent, where to trust it, where to review it hard. You end up with a team that knows the tooling, not a dependency on us.

Everyone else can ship too

Support, ops, and product people get a safe way to put small changes into the codebase: copy fixes, config, the one-line changes that used to cost an engineer an afternoon. Same pull requests, same review, same guardrails.

Talk about your team

Scoped and priced per team: tell us where the time goes today.