The Mobile App UI/UX Design Agency That Increases Retention and Simplifies UX

We design intuitive mobile app experiences that help startups and businesses improve usability, increase engagement, and create products users genuinely enjoy using.

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What is Mobile App UI UX Design?

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Mobile app UI and UX design is the process of designing how a mobile application looks, feels, and functions for the people using it across iOS, Android, or both platforms. It includes everything from first time onboarding and navigation flows to everyday feature interactions, visual details, and the small moments that make the experience feel intuitive and polished.

UI stands for User Interface and focuses on how your app looks, including colors, typography, buttons, icons, and every visual detail users interact with. UX stands for User Experience and focuses on how the app works, including navigation, flows, interactions, and how easily users can achieve their goals. Great mobile app design depends on both because users expect apps to feel visually polished and easy to use at the same time.

Most smartphone users download far more apps than they actively use. That means great mobile app design is not only about attracting downloads. It is about creating an experience valuable and enjoyable enough to become part of a user’s daily routine. In a highly competitive market, design often becomes the difference between an app users keep opening and one they abandon after the first experience.

First impressions determine whether your app gets a second chance

Great app design keeps users engaged from the very first experience.

Design directly determines app store ratings and reviews

Great UX drives better reviews, more visibility, and higher app downloads.

Great mobile design reduces development costs and timelines

Clear app designs help developers build faster with less rework and lower cost.

Types of Mobile Apps We Design

From consumer apps to enterprise mobile platforms — we design every type of mobile application your business needs to engage users and deliver real value on every device.

What you get

Every mobile app design project at Convex includes a complete set of deliverables designed to give your development team everything needed to build a polished, high quality mobile app with clarity and consistency.

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User Research & Legal User Persona

Real insights from clients, lawyers, and administrators that drive every design decision

User Flow & Information Architecture

Every user journey mapped to be logical, intuitive, and completely frictionless

Wireframes & Low-Fidelity Layouts

Structure and experience validated before visual design begins.

High-Fidelity UI Screens

Pixel-perfect screens covering every interaction in your product.

Complete Design System

Reusable components that keep your product consistent as it scales.

Interactive Prototype

A clickable prototype ready to test, present, and validate instantly.

Unlimited Revisions Within Scope

A clickable prototype ready to test, present, and validate instantly.

Figma Source Files

Fully organized design files your developers can build from directly.

Developer Handoff Documentation

Detailed specs so developers build exactly what was designed.

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How We Design Your Mobile App

A structured, user centered process designed to take your mobile app from initial concept to a fully designed, developer ready experience tailored to the platforms your users rely on every day.

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Step 01

Discovery & Research

Step 02

User Flow & Wireframes

Step 03

UI Design & Design System

Step 04

Prototype & Testing

Step 05

Handoff & Support

Why Your Mobile App Needs Great Design

The average app loses 77% of its users within the first 3 days of download. Here is why great mobile app design is the primary differentiator between apps that retain users and apps that get deleted — and what it means for your business.

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Reason 01

Poor onboarding is the number one reason apps get deleted

Reason 02

Bad UX generates bad reviews that destroy organic growth

Reason 03

Design quality determines app store conversion rate

Reason 04

Engagement and retention are directly designed in

This is for you if...

Mobile app design is for any business serious about building a mobile experience users love. Here is how to know if Convex is the right design partner for your app project.

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You are building a mobile app from scratch

Design an app users love from day one with a polished, retention-focused UX.

Your existing app has poor retention or low engagement

Low retention? Redesign your app to keep users engaged and coming back.

Your app has poor app store ratings

Improve app ratings with a UX redesign focused on better user experience.

You are a technical founder without a mobile designer

Build your app with a UX partner who understands mobile user behavior.

You are preparing to launch on the app store or Google play

Launch with an app designed to earn downloads, reviews, and user retention.

You have a web product and want to build a mobile version

Turn your web app into a mobile experience that feels truly native.

Simple,
Transparent Pricing

One clear package. Everything your mobile app needs to launch beautifully, retain users, and grow through exceptional design on every device and platform.

Fintech Design

Starting from

$2,200

Specialist legal design built for authority, client trust, and professional credibility — delivered completely.

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Delivered in 4-6 weeks

User Flow & Information Architecture

Wireframes & Low-Fidelity Layouts

Complete Design System

Interactive Prototype

Figma Source Files

Developer Handoff Documentation

Unlimited Revisions Within Scope

Post-Handoff Support

Startups building a new mobile app

Apps with poor retention or engagement

Apps with poor App Store ratings

Technical founders without a designer

Apps preparing for App Store launch

Web products building a mobile version

Frequently Asked Questions

Everything you need to know about investing in mobile app UI/UX design — and the real impact it can make on your retention, engagement, and app growth.

How will great mobile app design improve my user retention?

Mobile app retention is often driven by the quality of the user experience before anything else. Users usually abandon apps when the value feels unclear, the experience feels frustrating, or the product fails to become part of their routine quickly enough. Great mobile app design improves retention by helping users experience value early, reducing friction throughout key interactions, and creating experiences that feel intuitive and rewarding to return to over time.

How will better design improve my App Store or Google Play rating?

App store ratings are one of the clearest indicators of user experience quality, and they influence organic growth more than almost any other factor. A 4.8 star app with thousands of reviews converts significantly more listing visitors into downloads than a 3.2 star app with the exact same feature set. Great mobile app design improves ratings by removing the UX problems that most commonly trigger negative reviews, such as confusing navigation, frustrating interactions, unclear user flows, and poor onboarding experiences that make users feel their time was wasted. When users consistently have a smooth and enjoyable experience, positive reviews happen naturally, strengthening the social proof that drives long term organic download growth.

How does mobile app design impact my app's revenue?

Mobile app design impacts revenue across every major monetization model. For subscription apps, better retention means users stay subscribed longer, increasing both lifetime value and average revenue per user. For freemium apps, stronger onboarding helps more users experience real value before reaching the paywall, improving free to paid conversion rates. For e commerce apps, smoother product discovery and checkout flows increase purchase conversion and average order value. And for ad supported apps, stronger engagement leads to more sessions per user and higher ad impression volume. Great mobile app design improves the performance of all of these revenue drivers simultaneously.

Do you design for both iOS and Android?

Yes. We design for both iOS and Android as part of every mobile app project. Each platform has its own design guidelines, interaction patterns, and user expectations, so we make platform specific design decisions to ensure the experience feels natural on both. This includes adapting navigation patterns, typography, iconography, gestures, and interface components to align with what iOS and Android users already expect from their devices.

How will great design help my app compete in a crowded App Store category?

App Store categories are extremely competitive, with thousands of apps competing for the same users and rankings. In that environment, design quality becomes one of the few long term competitive advantages a mobile product can build. Apps with polished interfaces and exceptional user experiences often outperform competitors with similar or even stronger feature sets because users choose products based on how they feel to use, not just what features they include. Great design creates the kind of loyalty that makes switching to another app feel like a worse experience.

Can you redesign an existing app that is underperforming?

Yes, and mobile app redesigns are often some of the highest impact projects because improvements in engagement and retention can frequently become visible within the first 30 days after launch. Before redesigning, we conduct a detailed review of your existing app experience, including retention metrics, user drop off points, recurring App Store complaints, and the UX issues most likely affecting long term engagement. The redesign strategy is then built specifically to solve those problems, resulting in an app that performs better, not just one that looks more modern.

Do you sign NDAs?

Absolutely. We understand that mobile app projects often involve unreleased product ideas, confidential feature plans, and sensitive business information that need to remain protected before launch. We are happy to sign a Non Disclosure Agreement before the first consultation call so you can discuss your project openly and confidently from the very beginning.

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