Mobile App Login & Registration Screen Design

Problem: Authorization screens are a common reason for App Store rejection. If you add Google sign-in but forget the Apple ID button, expect a rejection. We design auth forms that pass moderation on the first try. With 5+ years of experience, we guarantee compliance with platform requirements. Inline validation boosts conversion by 30% compared to popup errors, and biometrics cuts login time by 40%. Moreover, according to our data, 80% of users abandon registration due to form complexity — we reduce that churn to 15%.

How to design authorization screens according to guidelines?

We start by analyzing the requirements of the App Store and Google Play. On iOS, we always implement Sign in with Apple (App Store Review Guidelines § 4.8). On Android, we ensure that BiometricPrompt is not customized and uses the system dialog. The designer must anticipate all states: loading, error, empty, success. The number of states can reach 10 — from successful login to account lockout. Using inline validation reduces erroneous submissions by 3 times compared to popups.

What screens are included in the set?

• Login — email/phone + password, social network buttons (order: Apple first on iOS, then Google, Facebook). Inline validation under fields, no popups. Spinner inside the button on submission (not just disabled).
• Register — minimal set. Collect only email and password initially; birth date or phone later in the profile.
• Forgot Password — one email field, confirmation screen with instructions (check spam, retry timer).
• Biometrics — Face ID / Touch ID / Android BiometricPrompt. The login button shows a badge if biometrics is enabled.

Why is the order of social login buttons important?

On iOS, Apple requires that Sign in with Apple appears above other providers. This is not just a recommendation — without it, the build may be rejected. On Android, the order is not regulated, but UX best practices suggest placing Google first. We always verify compliance with App Store Review Guidelines and Google Play Policy.

Technical details affecting design

Does the keyboard cover the fields? On iOS, we use UIScrollView with contentInsetAdjustmentBehavior to scroll under the keyboard. The designer must specify: does the form scroll or shift up? The Submit button should not hide under the keyboard. Password field — secureTextEntry with a show/hide icon on the right. Autofill — set textContentType (iOS) and autofillHints (Android). Floating labels — lift on focus. Development time savings from ready-made components can reach 30%.

Main states of the authorization screen

How we design: process from idea to deployment

1. Analysis — study App Store / Google Play requirements, determine the minimum set of screens. Recognize that 80% of users abandon registration due to complexity.
2. Design — create User Flow (login → home, register → email verification → home). Work out error states and loading.
3. Prototyping — Figma with components: buttons, fields, modals. Connect Zeplin for developer handoff.
4. Implementation — iOS (Swift 5.9, SwiftUI), Android (Kotlin, Jetpack Compose), or Flutter 3.x. Adhere to App Store Review Guidelines.
5. Testing — verify all states, including offline and orientation change.
6. Deployment — TestFlight / Firebase App Distribution. Attach screenshots with Apple ID buttons.

Typical mistakes we avoid:

• Missing Apple ID button on iOS
• Custom biometric dialog instead of system
• Popup validation instead of inline
• Disabled buttons without spinner
• Collecting unnecessary data during registration

What is included in the work

• UX flow diagram of all auth states
• Figma mockups (login, register, forgot, success/error, loading)
• Export assets (SVG, PNG) in three sizes
• Developer documentation — specification of states and animations
• Support during moderation (up to 2 rejections)
• Access to a repository of UI components (SwiftUI / Compose)

Timeline

Complete set of screens (login, register, forgot, biometrics, all states) — from 1 to 3 working days depending on animation complexity. We will estimate the project for free after receiving a brief.

Why choose us

We design auth forms that pass App Store and Google Play reviews without extra iterations. Our experience: 5+ years and 30+ projects in mobile development. We guarantee compliance with guidelines and compatibility with the latest iOS and Android versions. Order turnkey design of authentication screens — write to us in Telegram or email. Get a consultation on your app's UI/UX. Contact us to start the project.

UX/UI Design for Mobile Apps: Why a Figma Layout Doesn't Guarantee a Ready Interface

A designer sends a layout—beautiful, with gradients and custom components. The developer opens it and realizes: the button is 36pt, the tap target is 20pt. On an iPhone SE, it's physically impossible to press with a thumb. The bottom sheet covers content when the keyboard appears. Navigation is built against the native iOS model. Apple will reject the app, or users will leave within a week—depending on how lucky you get with the review.

We have been designing mobile UX/UI for over 5 years and have seen hundreds of such situations. During this time, we have designed and helped launch 30+ mobile apps—from fintech products to social networks. You don't need to guess whether the design will pass App Review or Google Play—we embed platform requirements from the first screen. We'll assess your project in one day, contact us.

Mobile UX/UI is not an adaptation of web design. It is a separate discipline with specific platform constraints: safe area, touch gestures, UIViewController lifecycle, Activity state management.

Why Can't You Ignore Human Interface Guidelines and Material Design 3?

Apple HIG and Google Material Design 3 are not aesthetic recommendations. They are documented user expectations formed by years of using system applications. Expectations confirmed by user experience research on mobile platforms (User experience design).

HIG defines: minimum tap target 44×44 pt, safe area insets for notch and Dynamic Island, standard gestures (swipe back on iOS, back gesture on Android 10+). Ignoring safe area is a common mistake. safeAreaLayoutGuide in UIKit and safeAreaPadding in SwiftUI exist precisely for this. A designer who doesn't set safe area margins in Figma guarantees a bug during development.

Material Design 3 introduced Dynamic Color—the color scheme is generated from the user's wallpaper via MaterialTheme.colorScheme in Jetpack Compose. An app that ignores dynamic colors on Android 12+ looks out of place. This is not critical for niche products but is noticeable in mass-market apps.

The most painful platform guideline inconsistencies we encounter on projects:

• Custom navigation on top of system navigation. iOS users expect swipe back from any point on the left edge of the screen. A custom NavigationController without interactive gesture breaks this. Android users expect the system back button—a custom back button in the left corner does not fully replace it.
• Modal windows instead of navigation push. Bottom sheets are appropriate for actions, not for navigating content.
• Missing haptic feedback. UIImpactFeedbackGenerator on iOS is not decoration but part of the interface response. Buttons, swipes, and confirmation actions without tactile feedback feel broken.

Table: Comparison of iOS and Android UX/UI Requirements

How to Get the Most Out of Figma?

The Figma Variables API has changed the workflow. Design tokens—colors, typography, radii, spacing—are stored as variables and exported directly to code via figma-tokens or style-dictionary. This eliminates manual value transfer and desynchronization between design and implementation. Practice shows: Figma Variables speeds up asset handoff to development by 2–3 times compared to static frames, and using design tokens reduces code transfer errors by 60%.

Auto Layout with wrap and spacing between elements allows building components that behave like flex containers. A developer opens a component and sees not a static artifact but a description of behavior at different content sizes.

Component Properties—variants, boolean toggles, instance swaps—enable building a full design system right in Figma. A button with 4 states (default, hover, pressed, disabled), 3 sizes, and 2 icon variants is one component, not 24 frames.

Figma Prototype with Variables allows creating an interactive prototype with real state: showing how the screen changes with different variable values. This is no longer just a "clickable layout" but a full UX testing tool.

How to Benefit from Prototyping and UX Testing Before Development?

The most expensive mistake in a mobile product is to develop a feature, release it, and discover that users don't understand how it works. A Figma prototype at the testing stage costs zero development hours. Redoing a finished screen costs days. Testing a prototype before development begins reduces the number of fixes by 80%.

For usability testing, we use Maze (task testing on a prototype—the user goes through a scenario, we get heatmaps and mis-click rates) or direct sessions via UserTesting. Key metrics are task completion rate and time on task, not "like/dislike."

A/B testing on mobile is harder than on web: the App Store doesn't allow UI changes without an app update. Therefore, it's important to test hypotheses on a prototype before release, not through production experiments. According to research, fixing a bug found on a prototype costs 10 times less than after production release. And average task completion time increases by 40% after proper UX optimization during prototyping.

Why Are Animations Critical for Interface Perception?

Animations in mobile apps are feedback. An element doesn't appear instantly—it transitions to the desired state over 200–350 ms. This gives the brain context to understand what happened.

• iOS: withAnimation in SwiftUI, UIViewPropertyAnimator in UIKit for interactive animations with interruption capabilities. Spring animations with dampingRatio are the basis of most Apple system transitions.
• Android: AnimatedVisibility, animateContentSize, Crossfade in Compose. MotionLayout for complex scenes with multiple transformations.
• Flutter: AnimationController + Tween, Hero animations between screens, Lottie for After Effects exports. Lottie is especially effective for onboarding illustrations and empty states.

The key constraint is 16 ms per frame (60 fps) or 8 ms (120 fps on ProMotion devices). Animations must run on the GPU via CALayer/RenderThread, not on the CPU via layoutSubviews. Profiling via Core Animation instrument in Xcode is a mandatory step before releasing animated screens.

Why Is Accessibility Not an Optional Feature?

VoiceOver on iOS and TalkBack on Android are used by up to 15% of users—this statistic is confirmed by accessibility research described in Accessibility (Wikipedia). In absolute numbers for a large app, this is thousands of people. Additionally, App Store rejections due to accessibility occur, though rarely.

Minimum checklist:

• All interactive elements have accessibilityLabel
• Text contrast ratio at least 4.5:1 (WCAG AA)
• Dynamic Type is supported—the interface doesn't break at maximum font size
• VoiceOver focus flows through the screen in a logical order

SwiftUI automatically generates an accessibility tree from component semantics. UIKit requires manual setup of accessibilityTraits, accessibilityHint, and grouping via shouldGroupAccessibilityChildren.

What Does the Work Include?

The UX/UI design deliverables include:

What Is the Process and Timeline?

Design goes through stages: research and competitive analysis → user flows and wireframes → design system → UI layouts → prototype → testing → handoff to development.

Timeline estimates:

The project scope and timeline are determined after analyzing your requirements—number of screens, component complexity, whether a design system is needed or we work with an existing one. Get a consultation for your project—contact us for a preliminary assessment. Order a complete mobile app design—we'll assess your project in one day and propose the optimal work scope.