Grew StudioGrew Studio

    App Development

    Custom Apps That Solve Problems No Off-the-Shelf Software Can

    From simple tools that save hours each week to complex systems that run entire operations—we build apps tailored to how YOUR business actually works.

    Because your business isn't generic, your software shouldn't be either.

    See Our Apps

    Do You Need This?

    When Do You Need a Custom App?

    Not every business needs custom software. Here's how to know if you do.

    Signs You Need Custom Software

    • You're managing critical processes in spreadsheets
    • You're paying for 5 tools that don't talk to each other
    • Your workflow is unique and off-the-shelf tools don't fit
    • You're spending hours on tasks that should take minutes
    • Your industry is too niche for generic solutions

    What Custom Apps Can Do

    • Automate repetitive manual work
    • Connect systems that don't integrate
    • Give you data visibility you don't have now
    • Scale with your business without switching tools
    • Become a competitive advantage

    What We Build

    From Simple Tools to Complex Platforms

    We build apps across the entire spectrum of complexity. Here's what's possible.

    Simple Tools

    Days to Build
    • Quote generators for contractors
    • Appointment schedulers for service businesses
    • Client intake portals
    • Internal dashboards for tracking metrics

    Business Systems

    Weeks to Build
    • CRM alternatives for specific industries
    • Inventory management for warehouses
    • Booking systems with custom logic
    • Employee scheduling with SMS notifications
    • Customer portals with self-service

    Complex Platforms

    Months to Build
    • Multi-location operations management
    • Real estate portals with automated valuations
    • Marketplace platforms connecting buyers and sellers
    • Logistics and dispatch systems
    • Industry-specific SaaS products

    Real Problems, Real Solutions

    Apps Businesses Actually Need

    These aren't hypothetical. These are real problems we've seen businesses face—and the kind of solutions we build.

    1. 01

      Cleaning Company Operations

      Problem

      Managing 15 cleaners across 40 locations with spreadsheets and WhatsApp groups

      Solution

      App that auto-assigns jobs from booking calendar, sends SMS to cleaners, tracks completion with photos

    2. 02

      Contractor Quoting System

      Problem

      Spending 2 hours creating quotes that may never convert, then losing track of follow-ups

      Solution

      Enter job details, auto-generate branded PDF quote, track follow-ups and conversion rates

    3. 03

      Property Management for Small Landlords

      Problem

      Managing 8 units with notes, spreadsheets, and missed maintenance requests

      Solution

      Rent tracking, maintenance scheduling, tenant communication, and digital lease storage in one place

    4. 04

      Client Intake Portal for Professional Services

      Problem

      Chasing clients for documents, passwords, and information via email for weeks

      Solution

      Guided portal where clients upload everything through checklists with automatic reminders

    5. 05

      Restaurant Reservation System

      Problem

      Paying expensive platforms that own your customer data and charge per booking

      Solution

      Your own system with SMS confirmations, waitlist management, and full guest data ownership

    6. 06

      Freelancer Approval & Payment Tracker

      Problem

      Chasing clients for feedback and invoices across email, Slack, and texts

      Solution

      Single dashboard for proofing, approvals, contracts, and automatic payment reminders

    7. 07

      Multi-Location Inventory System

      Problem

      No visibility into stock across warehouses and stores, constant stockouts or overstock

      Solution

      Real-time inventory tracking with low-stock alerts, transfer requests, and purchase order automation

    8. 08

      Industry-Specific CRM

      Problem

      Generic CRM has 50 fields you don't use, missing the 5 you actually need for your sales process

      Solution

      CRM built around YOUR pipeline stages, custom fields, and the integrations you actually use

    See a problem similar to yours?

    Our Services

    What We Can Build For You

    From web apps to SaaS products—here's everything we offer.

    Web Applications

    Full-featured web apps with rich interfaces, real-time updates, and modern UX

    What's Included
    • Responsive design that works on any device
    • Real-time data updates and notifications
    • Role-based access control
    • Admin panels and user management
    Use Cases

    Dashboards, portals, management systems, internal tools

    Deliverables

    Deployed application, admin panel, user documentation, training

    Progressive Web Apps (PWA)

    App-like experience installable from browser, works offline, sends push notifications

    What's Included
    • Install to home screen without app stores
    • Offline functionality and data sync
    • Push notifications
    • Fast loading even on slow networks
    Use Cases

    Field service apps, mobile-first tools, customer-facing portals

    Deliverables

    Cross-platform app, installation guide, offline sync setup

    SaaS Products

    Turn your expertise into a software product you can sell to others in your industry

    What's Included
    • Multi-tenant architecture
    • Subscription billing with Stripe
    • User onboarding flows
    • Usage analytics and reporting
    Use Cases

    Productizing your expertise, industry-specific tools, startup MVPs

    Deliverables

    Scalable platform, payment integration, onboarding flow, landing page

    Internal Tools & Dashboards

    Custom admin panels and dashboards that give you visibility into your operations

    What's Included
    • Data visualization and reporting
    • Workflow automation triggers
    • Integration with existing systems
    • Role-based permissions
    Use Cases

    Operations management, data visibility, team coordination, executive reporting

    Deliverables

    Custom dashboard, integrations setup, team training

    API Development & Integrations

    Connect systems that don't talk to each other and automate data flow between tools

    What's Included
    • Custom REST or GraphQL APIs
    • Third-party integrations (Stripe, Twilio, etc.)
    • Data synchronization between systems
    • Webhook handlers and automation
    Use Cases

    Connecting tools that don't integrate, automating data flow, building integrations

    Deliverables

    API documentation, integration setup, monitoring and alerting

    MVP Development

    Fast-to-market prototype with core features only, built for validation before full investment

    What's Included
    • Core features that prove your concept
    • User feedback collection built-in
    • Analytics to validate assumptions
    • Architecture that can scale later
    Use Cases

    Testing an idea before full investment, startup launches, internal pilot programs

    Deliverables

    Working MVP, user feedback system, iteration roadmap, investor-ready demo

    Why Custom?

    Why Custom Beats Generic

    Off-the-shelf software works for generic problems. Here's why custom wins for everything else.

    1. 01

      Built for Your Workflow

      Generic tools force you to adapt your process to their limitations. Custom tools adapt to how you actually work.

    2. 02

      No Feature Bloat

      You only get what you need. No paying for 100 features to use 5, no confusing interfaces with options you'll never touch.

    3. 03

      Integrates With What You Have

      Connects to your existing tools instead of replacing everything. Your data flows where it needs to go.

    4. 04

      Grows With You

      Add features when YOU need them, not when the vendor decides to. Your roadmap, not theirs.

    5. 05

      Competitive Advantage

      Your competitors use the same generic tools. Your custom system is yours alone—it becomes a moat.

    6. 06

      No Per-Seat Ransoms

      Pay once to build it. Scale to 100 users without 100x the cost. Your team grows, your software bill doesn't.

    Our Process

    How We Build Your App

    A proven process that keeps you in the loop and delivers working software fast.

    1. 01

      Discovery & Scoping

      We define the problem, map current workflows, and separate must-haves from nice-to-haves.

      DeliverableDetailed project brief and feature specification

    2. 02

      Design & Prototyping

      Interactive prototypes you can click through before any code is written. No surprises.

      DeliverableFigma prototype, user flow diagrams, approval sign-off

    3. 03

      Agile Development

      Build in sprints with regular demos and feedback loops. You see progress every week.

      DeliverableWorking features every 1-2 weeks, staging environment access

    4. 04

      Launch & Iteration

      Deploy, gather real user feedback, and continuously improve based on actual usage.

      DeliverableProduction app, training, support documentation, feedback system

    Our Apps

    Apps We've Created

    Our own apps and client projects—all built with the same quality and attention to detail.

    Our app

    MôjLekár.app

    Communication system for medical practices

    Who it is for
    For medical practices. More than 50 practices already use it.
    The problem
    Instead of caring for patients, the nurse spends hours on the phone. The doctor is constantly interrupted by prescriptions and sick notes.

    What you get

    • Patients book through the web, the mobile app or by phone.
    • The AI assistant Olivia answers up to 8 calls at once.
    • E-prescriptions, sick notes and certificates in a few clicks.
    • SMS appointment reminders and invitations to preventive check-ups.
    Learn more about MôjLekár.app
    MôjLekár.app – website for a practice's patients
    MôjLekár.app – mobile version

    Our app

    kupnazmluva.online

    A property purchase contract from the title deed in 5 minutes

    Who it is for
    For real estate agents and agencies.
    The problem
    Contract templates from the internet are not reliable. Harvie reads the title deed and builds the contract for you.

    What you get

    • Upload the title deed and Harvie reads out the plots, shares and encumbrances.
    • Before it is generated, the contract passes more than 60 checks against the land registry law.
    • You get the contract and the registration proposal in Word and PDF, ready to sign.
    • If the land registry interrupts the filing because of an error in the contract, you get your money and the correct fee back.
    See kupnazmluva.online
    kupnazmluva.online – home page
    kupnazmluva.online – mobile version

    Client project

    BOZP Academy

    Complete occupational safety documentation in 10 minutes

    Who it is for
    For shops, warehouses, offices, e-shops, services and low-risk food service businesses.
    The problem
    Every employer must have up-to-date occupational safety documentation.

    What you get

    • Enter your company details, add a site and mark the job roles.
    • You get safety directives, a risk analysis and a protective equipment annex, based on the method of authorised safety technicians.
    • Documents in Word and PDF, with your letterhead, ready to sign.
    • Plus online safety and fire protection training with a test and certificate.
    See BOZP Academy
    BOZP Academy – home page
    BOZP Academy – mobile version
    View All Apps

    You might also like

    FAQ

    Frequently Asked Questions

    Answers to the questions we hear most often about custom app development.

    01How much does a custom app cost?
    It depends entirely on complexity. Simple internal tools can start in the low thousands, while complex platforms with multiple integrations cost significantly more. After a discovery call, we'll give you a clear, fixed quote—no surprises. We can also phase the build if budget is a concern.
    02How long does it take to build a custom app?
    Simple tools can be ready in 2-4 weeks. Business systems typically take 1-3 months. Complex platforms may take 3-6 months or longer. We'll give you a realistic timeline after understanding your requirements—not a sales pitch.
    03Can you work with our existing systems and data?
    Absolutely. Most projects involve integrating with existing tools—CRMs, accounting software, payment processors, spreadsheets. We'll map out what connects to what during discovery and make sure data flows where it needs to.
    04What if my needs change after we start?
    That's why we build in sprints. Requirements evolve as you see the app take shape—that's normal. We adjust scope as we go, with clear communication about how changes affect timeline and cost.
    05Do we own the code?
    Yes. You own everything we build for you—code, design files, documentation. It's your asset. You can host it yourself, hire another team later, or sell it. No lock-in.
    06What's the difference between a web app and a mobile app?
    Web apps run in browsers and work on any device. Mobile apps are installed from app stores. For most business use cases, Progressive Web Apps (PWAs) give you mobile app functionality without the cost and complexity of app store submissions.
    07Can you help us figure out what we actually need?
    That's what the discovery phase is for. Many clients come to us with a vague problem and leave with a clear solution. We'll map your workflows, identify the pain points, and recommend the simplest solution that actually solves the problem.
    08What happens if something breaks after launch?
    We offer support and maintenance packages for ongoing peace of mind. Bug fixes, security updates, small improvements—we're there when you need us. You can also bring in your own team later since you own the code.
    09I have an idea for a SaaS product. Can you help me build and launch it?
    Yes. We've helped founders go from napkin sketch to paying customers. We can build your MVP, set up subscription billing, and create a landing page. We focus on getting you to market fast so you can validate before investing heavily.

    Free Discovery Call

    Have a Workflow That's Driving You Crazy?

    Let's talk about whether a custom app makes sense for your situation. No pressure, just clarity.