Scholar
Transcript and curriculum tracking for homeschool families, built around what colleges actually want to see.
- Status
- Live
- Built with
- React · Supabase
- Live at
- goscholar.app
New Braunfels, Texas
Custom apps for small businesses. Built in weeks, not months.
I'm Nick Callas. I build the kind of software that's too specific to buy off the shelf and too small for an agency to bother with. The spreadsheet you've outgrown, the process that still runs on group texts, the thing you've been meaning to fix for two years.
Prefer email? nick@kallistodigital.com
ScholarAiJurySuperSitterWeak2Fit
What I do
Three ways this usually goes.
Custom app builds
You describe the problem in plain language. I scope it, price it as one number, and build it. You get working software, not mockups or a slide deck.
Automations and integrations
Connect the tools you already pay for so information stops getting retyped between them. Quotes, invoices, scheduling, notifications, reporting.
Ongoing support
A monthly retainer for changes, fixes, and new features after launch. Useful, but optional. The app is yours whether you keep me on or not.
What I've built
Four apps, built solo, on four different sets of tools.
These are my own products, not client work, so nothing here is hidden behind an NDA. Every one of them has a front door you can go look at. They run on different platforms on purpose, because picking the right one for the job is most of what you're hiring me for.
AiJury
Runs a business idea past a panel of five AI models, then turns their debate into a build plan you can hand to a developer.
- Status
- In beta
- Built with
- React · Supabase · OpenRouter
- Live at
- aijury.co
SuperSitter
Private booking app for teen babysitters, the families who hire them, and the sitter's parents, with safety check-ins and guardian alerts.
- Status
- In beta
- Built with
- React · Supabase · PWA · SMS
- Live at
- supersitter.app
Weak2Fit
White-label coaching platform that personal trainers license and run under their own brand. The AI writes the workouts and meal plans; the trainer keeps the client relationship and takes the payment.
- Status
- Closed alpha
- Built with
- Bubble · n8n · Claude API · Stripe Connect
- Live at
- weak2fit.com
Who's building this
I've wanted to learn how to program since I was young.
Life took a different turn, and I ended up in construction instead.
I spent 32 years in the industry, building over 600 homes alongside commercial shopping centers and restaurants. I also have degrees in accounting and finance, which mostly meant I was the guy who watched money disappear into bad process.
Every job started strong. Bids were tight, budgets were clean. But I valued relationships over strict paperwork, and I was never as tough on holding subcontractors accountable as I should have been. By the back half of a project, that habit always caught up with me. I'd do whatever it took to keep the client happy, and I'd absorb the cost myself rather than have the uncomfortable conversation. Multiply that over 600 jobs and it's not a story about one bad week. It's a story about what happens when you don't have a system that holds the line all the way through.
When AI came along, it finally gave me my way into software. I didn't start by building for a market. I started by solving problems in my own life.
Weak2Fit - I lost 150 pounds over two years, so I built a fitness app to help me keep it off.
Scholar - My daughter started homeschooling, so I built a transcript app to manage her academic records.
SuperSitter - My other daughter babysits, so I built her an app that handles her schedule, keeps her families straight, and sends the payment request the moment she clocks out.
AiJury - I kept bouncing between different AI models to test prompts and debug workflows, so I built a platform that runs the panel for you in one place.
That is still how I work. Someone has a real problem, I build the thing that fixes it.
How it works
Three steps, and you know the price after the second one.
- 01
Free 20-minute call
Tell me what you're trying to build or fix. No pitch, no obligation. Sometimes the answer is that you don't need custom software, and I'll say so.
- 02
Fixed scope, fixed price
You get a written scope and a single number before any work starts. No hourly billing and no change orders for things we already agreed on.
- 03
Build and hand off
I build in short cycles so you see progress every week. At the end it runs on your accounts, under your control, with the code in your hands.
What it costs
You get a fixed price before any work starts.
Every project is different, but almost all of them land in one of these ranges. Scoping is included. If yours turns out to need paid discovery before I can quote it, I'll tell you that on the first call, not after.
Simple build
$1,500 to $3,000
One kind of user, one job to do. An automation between tools you already pay for, or a single-purpose internal tool.
Standard build
$3,500 to $6,000
Where most projects land. A few kinds of user, real data behind it, logins, and automations running in the background.
Complex build
$6,000 to $12,000
AI features, several user roles, or connections into the systems you already run day to day.
Ongoing support
$150 to $500 a month
Optional. Monitoring and fixes at the low end, active development and priority response at the high end.
Hosting and services run about $25 to $75 a month depending on the app. Those are billed to your accounts, not mine, so you are never paying me a markup to keep your own software running.
For comparison, a development agency quoting the same work usually starts around $15,000, and many will not take a project this small at all. That gap is the reason this business exists.
Who I build for
I specialize in small businesses, the ones that get skipped over because they're too specific for off-the-shelf software and too small for most developers to bother with. A few industries I've worked in:
- Contractors
- Restaurants
- Property managers
- Service businesses
- Coaches
- Startups
- And more
Have something you'd like built?
Twenty minutes is usually enough to tell whether I can help and roughly what it would cost. Pick a time that suits you.