jhzjoan

Custom software and apps for small businesses

Fewer manual processes. More control of your business.

I build web apps and tools for small businesses: point of sale, payroll, payments, reports and internal processes. I already have ready-made apps for cafés, schools and studios; if your business is different, I will build one to fit it.

  • You talk directly to the person who builds it
  • Remote, in English or Spanish
  • Demos with fictional data
Café POS · demo
Café POS register at the demo café Marea Café: drinks catalog and a 120-peso order.
Studio App · demo
Studio App "Today" screen at a demo studio: who owes, packages about to expire and birthdays.

Signs

You don’t need “another app”. You need to fix what costs you time, money or mistakes today.

  1. You enter the same data several times

    Information goes from paper to Excel, from Excel to WhatsApp, and from there to someone else.

  2. Everything depends on one person

    If they are out, nobody knows where the information is or how the process worked.

  3. You find out too late

    Missing stock, cash differences or late payments show up once they have already caused trouble.

  4. Your system doesn’t fit

    You pay for generic software and end up adapting your business to it, not the other way around.

Ready-made apps

Apps for cafés, schools and studios

Web apps that open in the browser, nothing to install. Demos use fictional data: ask for one and I will walk you through it.

Point of sale for cafésAvailable

Café POS

Point of sale for cafés: register, shifts, inventory and reports from a tablet, phone or computer.

What it does today

  • Payments in pesos and dollars, with an exchange rate per shift and change in either currency
  • Shifts and cash counts, with blind counts for cashiers
  • Cash sales even when the internet goes down; they sync when it comes back
  • Inventory that goes down with every sale and warns you when stock runs low
  • Reports on sales, best sellers and payment methods
  • Printed or digital receipt with a QR code, in Spanish or English
  • A PIN for each person and manager approval for discounts and cancellations

Coming soon

  • Electronic invoicing (CFDI)
  • Mercado Pago terminal
  • Uber Eats, Rappi and DiDi Food orders
  • Recipes and costing
Ask for a demo
Café POS reports in the demo: sales for the last 7 days, tickets, average ticket and tips.
Café POS on a phone: the demo café catalog with prices in pesos and dollars.

Payroll for private schoolsWorking prototype

Nómina Escolar

Attendance and payroll for private schools in Mexico: from the time clock report to a reviewed payroll, without manual data entry.

What it does today

  • Imports the time clock report (CSV or Excel) or uses the web time clock with a PIN
  • Configurable attendance rules: grace period, late arrivals and deductions
  • Pre-payroll with a full breakdown and checks before approval
  • Vacations, leave and sick days with balances under Mexican labor law (LFT)
  • Excel reports for accounting and a log of every change
  • A portal where each teacher sees only their own pay stubs and attendance

Coming soon

  • Real stamping of payroll receipts (CFDI); today it runs in demo mode

Your accountant still reviews and approves payroll: the app makes their job easier.

Ask for a demo
Nómina Escolar dashboard at the demo school Colegio Horizonte (interface in Spanish): payroll cost, attendance and pending items.

Barre, pilates and yoga studiosAvailable for demo

Studio App

Students, packages, payments and attendance for studios, designed to be used from a phone.

What it does today

  • “Today” screen: who owes, which packages expire this week and whose birthday it is
  • Partial payments and clear balances; payments are never deleted, they are voided with a reason
  • Attendance that deducts classes from the package
  • Ready-to-send WhatsApp messages using your studio’s templates
  • Monthly summary, Excel export and student import
  • Front-desk users with their own permissions

Coming soon

  • Student portal
  • Online payments
Ask for a demo
Studio App “Today” screen at the demo studio Petalita Studio (interface in Spanish).

Custom software

Not a café, school or studio? I can still help.

I build web tools around the way you work. We start with the problem; technology comes after. A few examples of what can be built:

  • Order, inventory or delivery tracking
  • Collections and payment reminders
  • Automatic reports instead of building spreadsheets by hand
  • Portals for your customers or your team
  • Internal forms and processes that live on paper or in chats today
Ask for a quote

How I work

A simple, clear process

  1. Understand

    We talk through your current process: who is involved, where time is lost and which mistakes keep happening.

  2. Simplify

    I don’t digitize the mess: first we look for a simpler way to operate.

  3. Build

    A first version focused on the main problem, ready for you to try soon.

  4. Test and improve

    We use it in your real operation, adjust it and grow from there.

What to expect

Direct contact and honest promises

  • You talk to the builder

    No middlemen: the person who listens to you is the same one who writes your solution.

  • Your data, kept apart

    Each business only sees its own information; the database enforces that rule, not just the screen.

  • Risk-free demos

    Demos use fictional data, so you can explore without entering real information from your business.

  • No fine print

    Anything that is not ready yet is marked “coming soon”. I don’t promise what the app doesn’t do.

Who is this for?

It may be for you if…

  • You have repetitive processes that are still done by hand.
  • Your team juggles too many spreadsheets, chats or separate files.
  • You need a clearer view of what is happening in your business.
  • The systems you have tried are too generic or complicated.
  • You want to start with something concrete and improve it as you use it.

You may not need it if…

  • A standard, affordable tool already solves your problem well.
  • You just want “to have an app”, without a clear problem to solve.
  • There is no process we can observe, measure or simplify.

FAQ

What people ask me most

How much does it cost?

It depends on what you need. Apps are paid with a monthly subscription, and custom projects are quoted once I understand your process. Write to me and I will send you a quote, no strings attached.

How long does a custom project take?

It depends on the size. The idea is to have a first version you can try soon and improve it with real use, instead of waiting months for something “complete”.

Do you work with businesses outside your city?

Yes. I work remotely, in English or Spanish, with businesses in Mexico, the US or wherever you are. We talk over video calls and the apps run in the browser.

Do I need to install anything?

No. They are web apps: they open in the browser on your phone, tablet or computer. Some can be added to the home screen like an app.

Do they work offline?

Café POS keeps taking cash payments if the internet goes down and syncs the sales when it comes back. The other apps need a connection to save information.

Is my data safe?

Each business can only see its own information, and the database enforces that rule. Demos use fictional data.

Do the apps issue electronic invoices?

Electronic invoicing (CFDI) in Café POS and payroll stamping are on the way; today they run in demo mode. Ask me about the progress.

Contact

Tell me which part of your business is eating your time.

You don’t need to know what software you want. Write to me about what you do today and what gets complicated; I will reply personally.

Send an email

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