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A sunlit design studio: on the monitor, app screens progressing from wireframe to finished screen; on the tablet, a wireframe drawn with a stylus; on the phone, the wireframe turning into an interface, with touch target and contrast checks; above, holographic panels for User flow, Components and Accessibility
Module 02 · Mobile Apps

Mobile App UI/UX Design: From User Flow to Prototype

In mobile app UI/UX design, we finalize every screen before the development team starts coding. First we map the user flow, then we prepare wireframes, and finally we move to high-fidelity Figma screens. We run this entire design stage end to end, in line with accessibility standards.

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In depth
01

How Do We Move from Flow to Screen in Mobile App UI/UX Design?

In every project, we start by building the information architecture. We first lay out screen-to-screen transitions, user scenarios and possible error states in a rough wireframe. Moving to colour and typography before the flow's logic is settled creates rework later.

At this stage, the screens carry no colour, typography or visual detail. Our goal is to test the flow's logic and the button hierarchy. Once you approve, we dress the wireframe in typefaces, colours and micro-interactions chosen for your brand identity. Next, we build a design system in Figma. Buttons, form fields, cards and the navigation bar live in one place in this component library. That keeps every screen consistent, and the development team works from a single point of reference.

02

Accessibility and Touch Target Standards in UI/UX Design

Before we submit any screen for approval, we run it through an accessibility checklist. The contrast ratio between text and background comes first. A colour-blind-friendly palette and screen-reader-friendly labelling are on the list too.

We never shrink touch targets below the minimum size that the iOS and Android guidelines recommend. This lowers the risk of mistaps when people use their fingers. In the same way, we script form fields, error messages and loading states during design. For example, we decide in advance what users see if they abandon a task halfway. In the Figma file we hand over, we leave Dev Mode switched on. Your engineering team can then read spacing values, colour codes and component properties straight from the file. The exact numbers behind these measurements are spelled out clearly in Apple's Human Interface Guidelines.

03

Our Mobile App UI/UX Design Process

We split interface projects into six steps, because each approval lays the groundwork for the next. This way, we move to coding only with validated screens. As a result, the need to go back to design during development drops noticeably.

  1. First, we work out the information architecture and prepare a map of transitions between screens.
  2. Next, we test the flow and button hierarchy with you using rough wireframes.
  3. After approval, we dress the screens in brand typography, the colour palette and micro-interactions.
  4. Meanwhile, we build the design system and component library in Figma.
  5. We test the prototype and fix confusing steps while still in design.
  6. Finally, we hand over the Figma file to you with Dev Mode enabled.

In short, as soon as design is done, your team can start coding with validated screens.

01 Information architecture Information architecture: a screen-to-screen transition diagram with a branching error-state node — illustrative graphic A single screen node at the top, with three connections branching down to three screen nodes side by side. A dashed "Error states" node branches down from the right-hand screen, with an exclamation mark beside it. On the left is a "User scenarios" box, and at the bottom a "Screen-to-screen transitions" note. In the animation, the connections draw in and the nodes enter from left to right. Info architecture Transition map Screen Error states User scenarios Screen-to-screen transitions
02 Wireframe → Screen Same skeleton: a wireframe on the left, a high-fidelity screen on the right — illustrative graphic Two phone frames side by side with a right-pointing arrow between them. The left one, "Wireframe", has only grey boxes, a cross-hatched image placeholder and thick bars. The right one, "High fidelity", has the same layout but with a real image, thin typography bars, rounded corners and an accent-coloured button. Below are "Typography", "Colour palette" and "Iconography" chips, with a "Component library" note at the bottom. In the animation, the wireframe enters first, then the arrow, then the high-fidelity screen. Same skeleton Wireframe High fidelity Typography Colour palette Iconography Component library
03 Accessibility Accessibility checklist and touch target demonstration — illustrative graphic A three-row checklist: "Contrast ratio", "Colour-blind-friendly palette" and "Screen reader". Each row has an icon for its topic on the left and a check mark on the right. Below is a separate demonstration: a button inside a larger dashed touch frame, with a double-headed measuring arrow and a "Touch target" label beside it. The demonstration deliberately has no numbers. At the bottom is a "Platform guidelines" note. In the animation, the rows slide in from the right and the check marks appear after them. Accessibility Checklist Contrast ratio Colour-blind-friendly palette Screen reader Touch target Platform guidelines
Illustrative graphic. The drawing shows the three steps in order. At the first stop, we map transitions and error states through the information architecture. In the middle, we carry the same skeleton from wireframe to high-fidelity screen; at the end, we apply the accessibility checklist. The boxes are an example drawing; we didn't take anything from a real app. To avoid inventing names, we drew only bars for the screen titles. The contrast mark and the touch-target frame at the last stop only show that we check these items. That's why we deliberately wrote no measurements, ratios or thresholds on them. The swatches in the colour-blindness row show an illustrative palette, not a simulation.

For the current price and timeline range, see the pricing section on our Mobile Apps page — you can pin down the range for your scope in two minutes.

Prepared by: TasarımMania Mobile App Team · Last updated: 21 October 2026

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FAQs

Frequently asked questions: mobile app UI/UX design

At what stage does mobile app UI/UX design begin?

It starts before development and runs as a separate stage. Once you approve the flow and wireframes, we prepare the high-fidelity screens and do a final check on the prototype. We move to coding only after that approval.

What is a wireframe, and how is it different from a high-fidelity design?

In short, a wireframe is a low-detail draft that shows the skeleton of a screen. It carries no colour, imagery or brand elements; it only tests the layout and flow. A high-fidelity design completes that same skeleton with typography, colour, icons and real content.

Do you test the design with users before coding starts?

Yes. We try out user scenarios on a clickable prototype. We fix the points where the flow gets stuck while still in design. A change made after coding costs far more.

Why does following contrast and touch target rules matter?

A screen with weak contrast or small touch targets can drive a significant share of users away from the app. On top of that, the problem drags down your store ratings. A design that follows platform guidelines reaches a wider audience and makes store review easier.

Do you hand over the Figma file to us?

Yes. The file stays with you and comes with Dev Mode enabled. Your engineering team can start work without waiting for a separate document.

Is redesigning an existing app's interface faster than designing from scratch?

The analysis step is shorter, because we already know the app's flow and data structure. On the other hand, the number of screens and technical debt can change the scope. You can see the timeline per project in the pricing section.

What does a design system do in mobile app UI/UX design?

It ties colour, type style and component decisions to a single source. That way, the look stays consistent as you add new screens to the app. In short, a design system is the shared language of a growing app.

What is the difference between UI and UX design?

UX covers the flow, user scenarios and information architecture. UI, by contrast, adds typography, colour and micro-interactions on top of that skeleton. We handle both in the same process, with the same team.

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Details

If you'd like to look before deciding

  1. 01

    Information Architecture and Wireframes

    First, we map out the transitions between screens. With rough sketches, we define what information each screen carries and which step it leads the user to. This early feedback reduces later changes to the high-fidelity screens.

  2. 02

    Design System and Component Library

    We don't redraw buttons, form fields or cards for every new screen. They all come from a single component library. That means developers can reuse the same piece across different screens too.

  3. 03

    User Testing and Prototype Validation

    We run trials on a clickable prototype with real users or our in-house team. This helps us catch confusing points in the flow early. After working the findings into the design, we hand only validated screens to the development team.

LIVE LOOP

Go into Development with Your Interface Ready

Let's plan the whole interface process together, from the flow map to the Figma file we hand over to you. For scope and delivery details, see the pricing section on our Mobile Apps page. Or, if you prefer, write to us directly first and let's talk.

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