Custom app studio · nexlevl.app

Your idea, built to the next level.

We design and build custom web, mobile and AI apps for founders and teams who've outgrown templates and off-the-shelf tools.

Start your build See how we work
Web · iOS · Android AI-native features You own the code

What we build

Apps shaped around how you actually work.

No templates, no page builders. Every nexlevl app starts from your users, your data and your workflow, then gets built on a modern stack your team can own and extend.

Web apps & SaaS

Customer portals, marketplaces and subscription products with auth, billing and admin built in.

  • Next.js
  • Stripe
  • Postgres

Mobile apps

iOS and Android apps from one codebase, with offline mode, push notifications and App Store release handled.

  • React Native
  • Swift
  • Kotlin

AI-powered tools

Assistants, document processing and agents that work on your own data, with guardrails and cost tracking.

  • LLM APIs
  • RAG
  • Agents

Internal tools & dashboards

Replace the spreadsheet tangle with one fast app for ops, inventory, scheduling or reporting.

  • Dashboards
  • Integrations
  • Automations

Process

Five levels from idea to launch.

You see working software from the first week. Each level ends with something you can click, test and share, so nothing gets lost between a slide deck and the final build.

  1. LVL 1

    Discover

    We map your users, goals and constraints, and cut the scope to what matters for launch.

    Out: scope & roadmap
  2. LVL 2

    Design

    Clickable prototypes you can put in front of real users before any code is written.

    Out: prototype
  3. LVL 3

    Build

    Weekly sprints with a live staging link and a Friday demo. You watch the app come together.

    Out: working app
  4. LVL 4

    Test & harden

    Automated tests, security review, performance tuning and accessibility checks.

    Out: release candidate
  5. LVL 5

    Launch & level up

    We ship to production and the app stores, then keep improving it from real usage data.

    Out: live product

Engagements

Pick the level you're starting from.

Fixed-scope sprints when you need clarity, full builds when you're ready to ship, and an ongoing partnership once you're live. Every engagement is quoted up front.

Starting out

Idea Sprint

2 weeks

Turn a rough idea into a tested plan you can build or raise money on.

  • Discovery workshops
  • Clickable prototype
  • Technical plan and fixed quote
Book a sprint
Most chosen

Ready to ship

MVP Build

8–12 weeks

A production-ready app in the hands of real users, built by a dedicated team.

  • Design, build and QA
  • Weekly demos and a live staging link
  • Launch to web and app stores
  • 30 days of post-launch support
Start a build

Already live

Level-Up Partner

Monthly

An embedded product team that keeps shipping features, fixes and improvements.

  • Reserved monthly capacity
  • Roadmap planning with you
  • Monitoring and maintenance
Talk to us

FAQ

Questions before you level up.

Do I own the code?

Yes. The code, designs and accounts are yours from day one. Everything lives in your own repository and cloud accounts.

How much does a custom app cost?

It depends on scope. After a short call we send a fixed quote, and the Idea Sprint ends with a detailed one for the full build, so you never sign up for an open-ended bill.

I'm not technical. Can I still work with you?

Most of our clients aren't. We explain trade-offs in plain language, and you make product decisions while we handle the engineering.

Can you take over an existing app?

Yes. We start with a code and infrastructure audit, fix what's urgent, then plan the next level with you.

Do you add AI features?

When they help your users. We build assistants, search, summarization and automation on top of your data, with clear limits on cost and privacy.

Start a project

What are you building next?

Tell us about your idea. We reply within one business day with next steps and a time to talk.

hello@nexlevl.app
What do you need?