TwentyThreeLabs Start a project

Mobile product studio · Germany to worldwide

Apps people
keep.

We turn ambitious ideas into polished mobile products—from the first product decision to the final store release.

Build your app Explore what we do
  • iOS
  • Android
  • Cross-platform
  • UX / UI
Store-ready
One focused team Strategy → launch
SwiftUIJetpack ComposeFlutterReact NativeProduct DesignBackend & APIs

What we do

Everything your app needs.
Under one roof.

From early product questions to post-launch improvements, we bring design and engineering into one tight feedback loop.

01

Think before build

Product strategy

Shape the roadmap, define the right first release, and turn uncertainty into decisions your team can act on.

DiscoveryRoadmappingMVP scope
02

Make it intuitive

UX & UI design

Clear user flows, interactive prototypes, and expressive interfaces grounded in real product behavior.

03

Native where it matters

iOS & Android

High-quality Swift, SwiftUI, Kotlin, and Jetpack Compose apps built around each platform’s strengths.

04

One codebase, done well

Cross-platform

Flutter and React Native products that feel at home on both platforms without duplicating the entire build.

05

Beyond the interface

Backend, launch & growth

Secure APIs, authentication, notifications, store submission, analytics foundations, and the support to keep improving after release.

APIsCloudApp storesPost-launch

How we work

A clear route from
idea to release.

No black box and no big reveal at the end. You see the product taking shape, make informed decisions, and know what comes next.

  1. 01

    Align

    Goals, users, constraints, and the smallest valuable release.

    1–2 weeks
  2. 02

    Prototype

    Flows and interfaces tested before production code gets expensive.

    2–4 weeks
  3. 03

    Build

    Focused sprints, visible progress, automated quality checks, regular test builds.

    Iterative
  4. 04

    Launch & grow

    Store readiness, release support, monitoring, and improvements informed by use.

    Ongoing

The studio difference

Small team.
Serious craft.

You work directly with the people shaping and building the product. Fewer handoffs mean faster feedback, clearer ownership, and better decisions.

Talk to the team
Weekly rhythm
Live
MONPlan the sprint
WEDShare a test build
FRIReview & decide

Short feedback loops keep momentum high and surprises low.

Built into every engagement

  • ✓Direct, transparent communication
  • ✓Privacy-first architecture
  • ✓Predictable milestones
  • ✓Production-ready handover

Technology

Right tool.
Right reason.

We choose technology for product fit, maintainability, and team reality—not for the trend cycle.

Native
  • Swift
  • SwiftUI
  • Kotlin
  • Jetpack Compose
Cross-platform
  • Flutter
  • React Native
  • TypeScript
Backend & data
  • Node.js
  • PostgreSQL
  • Firebase
  • Supabase
  • REST & GraphQL
Delivery
  • GitHub Actions
  • Fastlane
  • TestFlight
  • Play Console

Your next release starts here

Have an app
worth building?

Tell us what you are working on, where you are in the process, and what a successful launch looks like.

hello@twentythreelabs.io Replies within one business day · Germany / worldwide