MiamiMiami app developer with published prices
App369 is one Miami app developer, Simon Dziak, with prices published before you hire. A bug fix starts with a $450 diagnosis, a whole-app Launch Check is $450, a web app MVP starts at $6,000, and a monthly dev subscription starts at $1,495 a month.
- Fiverr
- 5.0 · 127 reviews
- Own product
- Workspace369
- Fixed-price offers from
- $450
Same fixed prices wherever you are
Fixed scope, fixed price, paid upfront. The work happens in writing; no call needed.
- App Fix Ticketfrom $450One reproducible bug in an existing mobile or web app, diagnosed and fixed.
- AI-Built App Rescuefrom $450A Lovable, Bolt or Cursor app checked end to end in 3 days, then its worst problems fixed at a fixed price.
- Web App MVP Sprintfrom $6,000A scoped web app MVP in Vue/Nuxt or React, with a fixed quote after a $450 written scoping.
- Monthly Dev Subscriptionfrom $1,495/monthOne development request at a time, most back in about 2 business days. Pause or cancel anytime.
Home base
App369 is based in Miami
App369 LLC is a Florida company based in Miami. The work runs remotely and in writing on Eastern Time.
Email simon@app369.com, or see the Miami app development companies compared.
A Miami clinic, law firm or real estate office that misses calls after hours can have an AI receptionist answer one channel, the phone line, website chat or web forms, and book the appointment, built as the AI Feature or Agent Build at $2,500. Speed to lead texts back missed calls and routes new leads into your CRM through the API Integration at $1,200. For work your team repeats every day, AI automation services take on one task at a time, such as document extraction or email triage.
AI receptionist
An AI receptionist for Miami offices
For Miami offices that miss calls: an AI receptionist answers the phone, website chat or web forms, asks your intake questions, books the appointment and logs every lead. Start with one channel or cover all three. Simon builds it on your own accounts at a fixed price, and you own it.
$2,500fixed
One channel
For a business that wants one front door answered first.
$5,000fixed
AI Receptionist Build
For a clinic, law firm or office that wants every call, chat and form answered, booked and logged.
$297a month
AI Care plan
For keeping it accurate as your hours, prices and questions change.
For a receptionist Simon built, on either tier. Cancel any time.
Built for your field:
Developer or agency
How does one Miami developer compare with Miami app agencies?
Clutch lists the top 10 Miami app firms with their own minimum project sizes and hourly rates, read November 8, 2026. On the same date, none of the 7 Miami agency pages that came up in a search for “miami app developer” published a price for app development.
| Compared | App369 (Simon Dziak) | Top 10 Miami firms on Clutch |
|---|---|---|
| Who builds it | One developer, Simon Dziak, from scoping to handover | Firms of 50 to 999 employees |
| Smallest project | A $450 diagnosis, credited toward the $1,200 fix | $5,000+ to $50,000+ minimum project size |
| How you pay | Fixed prices in writing before work starts | $25 to $49 or $50 to $99 an hour, as listed |
| Prices | Published for every offer, with what is and isn’t included | Listed as a minimum project size and an hourly band |
Sources, read November 8, 2026: Clutch: Top App Developers in Miami (each firm’s own listing). Agency pages checked for a published price: Simform, Bitcot, Dogtown Media, TekRevol, Trango Tech, Appluex, Miami Mobile App Development.
When is a Miami agency the better choice?
- You need several people working in parallel, such as designers, testers and a project manager, on a deadline one developer can’t meet.
- You want regular meetings in person. App369 works remotely and in writing on Eastern Time, with no meetings in person.
- You need round-the-clock on-call support. App369 is one developer working Eastern Time hours.
Not included in App369’s fix and rescue offers: new features, rewrites, App Store approval guarantees, changes to your production data (fixes ship as pull requests you deploy), and your hosting, Supabase, Firebase or Stripe bills.
Why App369
Why Miami Businesses Choose App369
What Miami teams should know before working with App369.
Serving Miami, Fort Lauderdale, West Palm Beach, and all of South Florida
Understanding of Miami's diverse business landscape
Focus on tourism, real estate, finance, and hospitality sectors
Founder-led studio based in Miami, Florida
Nearby Markets
Related Markets Around Miami
Nearby cities and the county hub, for context on neighboring markets.
What gets built
Software Development Services in Miami
Whether you're a Miami Beach startup or a Coral Gables enterprise, we deliver software that helps your business thrive in South Florida's competitive market.
Mobile Apps
iOS and Android apps built with Flutter from one codebase, from concept to App Store launch.
- iOS & Android
- Cross-Platform
- App Store Optimization
- Maintenance & Updates
Web Development
Fast websites and web applications, built for search and for phones first.
- Custom Design
- E-Commerce
- SaaS Applications
- SEO Optimization
Custom Software
Internal tools, integrations and back-office systems engineered around how your team already works.
- Enterprise Development
- API Integration
- Cloud Migration
- Technical Consulting
How it works
How a project runs, in 4 steps
A written scope and four clear phases keep Miami projects predictable.
Discovery
Understanding your vision, goals, and market requirements through stakeholder interviews and competitive analysis.
Design
Clear UI and UX with interactive prototypes you can click through before the build starts.
Development
Building in the stack the project needs, such as Flutter, Swift, React or Vue with Node.js, Firebase or Supabase, with progress shared in writing.
Launch
Deployment to production with crash and uptime monitoring and ongoing maintenance.
Technologies
- Flutter
- TypeScript
- Node.js
- GCP
- Firebase
- Vue
- JavaScript
- Python
Questions
Frequently Asked Questions
Is App369 based in Miami?
Yes. App369 LLC is a Florida company based in Miami, and Simon Dziak is its one developer. Work runs remotely on Eastern Time, in writing, for clients in Miami and across the US.
Is there an app developer near me in South Florida?
Yes. App369 is based in Miami and works with businesses across Miami-Dade, Broward and Palm Beach County, including Fort Lauderdale, Boca Raton and West Palm Beach. Projects run remotely on Eastern Time, in writing, with no meetings in person.
Does App369 do software development in Miami?
Yes. Besides mobile apps, App369 builds custom software for Miami businesses: web apps, internal tools, backends and APIs, and Stripe billing. Larger builds start with a paid scoping and a written quote.
Is App369 a Shopify developer in Miami?
Yes, for speed and checkout work. The Shopify Speed & Checkout Tune-Up is $750: mobile speed and cart-to-checkout fixes on a duplicate theme, measured before and after. Other Shopify work is scoped first and quoted in writing.
Does App369 build AI automation for Miami businesses?
Yes. The AI Feature or Agent Build is $2,500: one LLM feature or agent wired into your app or tools, such as a reply drafter, a document extractor or an agent that calls your API, with an eval set that shows how well it works. Larger AI builds are scoped first and quoted in writing.
How much does a Miami app developer cost?
The top 10 Miami app firms on Clutch list minimum projects from $5,000+ to $50,000+ and rates of $25 to $99 an hour (read November 8, 2026). App369 publishes fixed prices: a $450 diagnosis credited toward a $1,200 fix, a $450 Launch Check, web app MVPs from $6,000, and API integrations at $1,200.
How long does a typical project take?
It depends on scope. An App Fix Ticket diagnosis and a Launch Check each take 3 business days, and a fix takes 5. Larger builds start with a written scope and milestone plan, so you know the timeline before any build work starts.
How does payment work?
Every offer is a fixed price in writing, paid in full before that step starts. Larger builds are quoted after a paid scoping, and each step starts only with your yes.
Can App369 take over an existing app?
Yes. App369 takes over existing codebases in Flutter, Swift, Kotlin, React, Vue, Firebase or Node.js for audits, bug fixes, new features and migrations. An app that stalled, or whose developer left, can start with a Launch Check before any larger commitment.
Is there support after launch?
Yes. The Monthly Dev Subscription starts at $1,495 a month for one app or website: bug fixes, small features, UI and copy changes, Stripe, Firebase or Supabase fixes, and dependency and store-build updates, one request at a time.
Your Development Partner
Simon Dziak
Simon Dziak founded App369 and runs every project from scoping to launch: mobile and web apps, backends and APIs, AI features and agents, and Stripe and Shopify integrations. Simon also built and runs Workspace369, a client-management platform for freelancers and small businesses.
Start Your Miami Project
Fiverr reviews / 95 on app work
What buyers said about working with Simon
“Szymon is very professional, attentive to detail, and organized with his work. I appreciate the help with my project and I will be looking forward to our continued work together. THANK YOU!!!!”
A buyer in the United States, January 2022. Custom order on Fiverr “This seller is very responsive and listens to the clients needs. This is my second gig with this seller.”
A buyer in the United States, December 2021. Custom order on Fiverr “Amazing seller yet again! Looking forward to the next phase of the app development. I'm really excited. It's awesome to have a consultant I can trust!”
A buyer in the United States, November 2021. Custom order on Fiverr
Read the whole story
- Sixteen five-star reviews from one buyer: mobile apps, app design and a Shopify store (Mark, United States)
- A large custom app build, delivered on the back end and the front end (A buyer in the United States)