Will it connect to my CRM?

Yes. I connect apps to HubSpot, GoHighLevel, Salesforce, Pipedrive, Zoho and most other CRMs through their APIs, or through Zapier or Make when that is simpler. The same goes for Google Workspace, Slack, email tools and spreadsheets.

How long does it take to build an AI app?

Most apps take 2 to 6 weeks. You get a working prototype in the first week or two so you can test it with real data before the full build.

How much does a custom app cost?

It depends on the scope. After a free 30-minute call I send a fixed quote for a build sprint, or a monthly retainer if you need ongoing work. AI-assisted development keeps the price well below a traditional software agency.

Is my business data safe?

Yes. The app runs on your own accounts, uses only the information you approve, and I sign an NDA before you share any private data.

How will we communicate during the project?

Directly with me by email, Slack or WhatsApp, with short Loom video updates at each milestone and a weekly check-in when you want one.

Custom AI Apps and Web Apps for Small Businesses

Most businesses lose hours to the same tasks: pricing jobs by hand, chasing client documents, rebuilding the same report every month and answering the same questions. I build custom web apps and AI tools that take that work off your plate, connected to the tools you already use. Because I build with AI-assisted development and review every line myself, projects ship in weeks instead of months and cost a fraction of a traditional software agency.

Agencies: I also build white-label apps and AI tools for your clients.

GET A QUOTE FOR AI Apps

2 to 6 Wks

Typical Build

From idea to a working app

24/7

Always On

Tools that work while you sleep

100%

Code Ownership

Your app, your data, no lock-in

Software & Tools I Work With

The professional software I use on your project. Click any logo to visit the official site.

OpenAI API

Chatbots & AI Assistants

Chatbots on Your Website

Official Site↗

WHAT I BUILD

Practical tools that save your team hours every week or bring in more qualified leads. Each one is built around your business, not a generic template.

LEADS

Quote Calculators

Instant price estimates on your website from a few simple questions, so visitors get a number and you get a qualified lead.

01 OF 06

PORTALS

Client Portals

A private login where clients see project status, upload documents, approve work and pay invoices.

02 OF 06

DASHBOARDS

Dashboards & Reports

Your sales, marketing and operations numbers in one place, updated automatically instead of rebuilt by hand every month.

03 OF 06

INTAKE

Intake & Onboarding Tools

Smart forms that collect the right information, qualify the request and send it straight to your CRM or inbox.

04 OF 06

AI ASSISTANTS

AI Assistants Trained on Your Business

Chatbots and internal assistants that answer from your own services, FAQs, documents and past work, in your brand voice.

05 OF 06

AUTOMATION

Workflow Automations

Connections between your forms, CRM, email and spreadsheets so routine work runs on its own.

06 OF 06

Faster and more affordable

How AI makes development faster and cheaper

Custom software used to mean months of work and a five-figure budget. AI-assisted development changes that math, as long as a senior developer stays in charge.

SPEED

AI writes the first draft, I review every line

I use AI coding assistants to scaffold features, tests and integrations, then review and refine the code myself. You get speed without unreviewed code.

TIMELINE

Weeks instead of months

Work that used to take a small team a quarter now fits in a 2 to 6 week sprint, so you start saving time sooner.

BUDGET

Lower cost per feature

Fewer hours per feature means a lower fixed price. You pay for the result, not for a team's overhead.

QUALITY

Proven building blocks

Logins, payments, file uploads and dashboards are built on reliable, well-tested foundations instead of from scratch.

FLEXIBILITY

Easy to change later

Clean, documented code means new features and changes stay quick and affordable after launch.

OWNERSHIP

One person accountable

The same senior developer plans, builds, tests and supports your app. No hand-offs and nothing lost in translation.

Get cited by AI search

AEO tools for your business

Answer engines like ChatGPT, Perplexity, Gemini and Google AI Overviews now recommend businesses directly. These custom tools show you where you stand and help you get cited.

TRACKING

AI Citation Tracker

Checks whether ChatGPT, Perplexity, Gemini and Google AI Overviews mention your business for the questions your buyers ask, and tracks changes every month.

SCHEMA

Schema Generator

Turns your business details, services, products and FAQs into valid structured data (JSON-LD) that search engines and AI tools can read.

CONTENT

Answer Checker

Tests your pages against real buyer questions and shows whether each answer is clear, quotable and up to date, with suggested fixes.

See AEO services

Real builds

Example projects

Real tools I have designed and built. Client names stay private unless I have permission to share them.

Reporting web app

Reportify: SEO reports generated in one pass

The problem: Monthly client SEO reports were assembled by hand from Google Analytics, Search Console and Google Business Profile screenshots and exports.
What I built: A web app that imports those sources, organizes the metrics into report blocks with a live preview, and exports a polished executive report as a Word document.
The result: Monthly reports that used to take hours of copy and paste are now produced from the source data in one session, in a consistent format every month.

REACTVITEDOCX EXPORTGA4 DATA

Internal automation

Website audit and prospecting tool

The problem: Finding local businesses with weak websites meant opening and checking hundreds of sites one by one.
What I built: A crawler that audits websites in bulk (status codes, load time, titles, descriptions, headings and schema), captures screenshots and scores each site.
The result: A ready-to-use database of scored websites and technical audit reports, produced in a fraction of the time of manual review.

PYTHONWEB CRAWLERSEO AUDITCSV & JSON

E-commerce & CMS web app

Cesar Business Lab platform

The problem: Selling digital products, publishing content and running a newsletter usually means paying for several separate platforms.
What I built: This website: a Next.js app with a content management panel, a store with Stripe and PayPal checkout, secure expiring download links, and newsletter campaigns.
The result: One fast site that handles content, sales, delivery and email, with no monthly fees for separate store or newsletter software.

NEXT.JSSTRIPEPAYPALDECAP CMS

HOW I DELIVER YOUR PROJECT

A clear, milestone-based process, so you always know what happens next, from kickoff to final delivery.

Day 1–3

Discovery & Use Case

The task to automate, your data and tools, and what success looks like.

Day 4–8

Prototype

A working first version you can try with real questions and data.

Day 9–18

Build & Integrations

The full app, connected to your website, CRM, email or spreadsheets.

Day 19–20

Launch & Training

Going live, a short training session and a plan for improvements.

Pricing

Simple pricing: sprint or retainer

Every project starts with a free 30-minute call. You get a fixed quote before any work begins.

Build Sprint

Fixed price

Quoted after a free call · 2 to 6 weeks

Best for a defined tool: a quote calculator, a client portal, a dashboard or an AI assistant.

Scope, design and a working prototype
Full build, testing and launch
Integrations with your CRM, email or website
Team training and 30 days of support
100% ownership of the code

Get a quote

Monthly Retainer

Monthly

Reserved hours each month · cancel anytime

Best for ongoing improvements, several tools over time or a product that keeps growing.

Priority requests every month
New features and automations
Monitoring, updates and fixes
Monthly progress call
100% ownership of the code

Get a quote

Payment for a sprint is usually split into milestones. Hosting and AI usage fees (for example OpenAI or Claude API costs) are billed by those providers directly to your account, so you always see what you pay.

QUESTIONS ABOUT AI APPS

Yes. Once the final invoice is paid you own 100% of the code, the design and the data. Everything lives in your own accounts (hosting, database, AI provider), so you are never locked in and any developer can continue the work.

Ready to Start Your AI APPS Project?

Work directly with a senior freelance marketing consultant. Clear timelines, fixed deliverables and direct communication by Slack, email or WhatsApp.

REQUEST A FREE QUOTE

ALL SERVICES

Free review and proposal within 24 hours.

Explore Other Services

MORE WAYS I CAN HELP

VIEW ALL

#01FAST, SEO-READY WEBSITES

Website Design

Custom website design and development for small businesses and brands: fast pages, clear messaging, SEO built in and forms that turn visitors into leads.

EXPLORE SERVICE

#02GOOGLE & AI SEARCH VISIBILITY

SEO & AEO

SEO and answer engine optimization (AEO) for small businesses and brands: technical fixes, keywords, content and schema so Google and AI tools recommend you.

EXPLORE SERVICE

#03LOGOS, BRAND GUIDES & ADS

Branding & Design

Logo design, brand identity, brand guidelines, social media graphics, ad creatives and sales decks that make your business look established and trustworthy.

EXPLORE SERVICE

#04ADS, REELS & BRAND VIDEOS

Video Editing

Professional video editing for commercials, social media reels, YouTube and product demos, with color grading, motion graphics, captions and sound design.

EXPLORE SERVICE

#05AI ADS IN 48 TO 72 HOURS

AI Video

AI video production with Sora, Runway, Kling and ElevenLabs: AI avatars, voiceovers and ad variations, edited by a professional for a fraction of a shoot's cost.

EXPLORE SERVICE

#07CITED BY AI ANSWERS

AEO

Answer engine optimization (AEO) that helps ChatGPT, Perplexity, Gemini and Google AI Overviews understand, trust and recommend your business.

EXPLORE SERVICE

#08NATIVE SPANISH SEO

Spanish SEO

Spanish SEO for U.S. businesses: bilingual keyword research, Spanish pages written by a native speaker and local SEO to reach Hispanic customers.

EXPLORE SERVICE