An app can have the right features and still lose users on the way to them. Interface problems rarely announce themselves. Nobody files a bug that says the hierarchy is flat, they just stop finishing the signup.
These are the ten issues that most often sit behind a conversion problem, in roughly the order they cost money. Each one comes with what it looks like, why it works against you, and what to do instead.
- One screen, one primary action. Competing calls to action produce fewer decisions, not more.
- Every extra form field costs completions. Ask for what you need to deliver value and nothing else.
- Silence after a tap reads as breakage. Feedback within 100 milliseconds is part of the interaction, not polish.
- Consistency is a conversion feature. Users learn a pattern once, then reuse it without thinking.
- Empty, error and offline states are real screens. Design them or your users will meet the undesigned version.
Section 01
1. Cluttered screens and too much at once
Every feature, badge and banner ends up on the same screen because each one seemed important in isolation. The result is a page with no entry point, where three buttons have equal visual weight and none of them wins.
Faced with too many options a user does not evaluate them carefully. They stall, then leave. A focused screen converts better because it makes the next step obvious rather than asking the user to choose one.
- Give each screen one primary action and make it visually dominant.
- Use whitespace to separate groups rather than adding rules and borders.
- Push secondary features behind progressive disclosure or a separate screen.
- Establish hierarchy with size, weight and colour so the eye has a clear path.
Section 03
3. Weak visual hierarchy
Headings, body text and buttons all sit at similar sizes and weights, so the screen reads as an undifferentiated block. Users scan rather than read, and a flat screen gives scanning nothing to catch on.
Hierarchy is how you tell someone what to read first without saying it. Get it right and comprehension is instant. Get it wrong and even good copy goes unread.
- Set a real type scale, with meaningful jumps between levels rather than two point differences.
- Reserve your strongest colour for the primary action and nothing else.
- Group related content with spacing before reaching for dividers.
- Show a screen to someone for three seconds and ask what they remember. That is your actual hierarchy.
Section 04
4. Calls to action that do not look or read like actions
The button blends into the background, sits below the fold, reads Submit, and has a tap target smaller than a fingertip. Each of those is individually minor and together they are the whole conversion problem.
- Write the outcome, not the mechanic. Start free trial rather than Submit.
- Keep tap targets at 44 points or more in height, with real padding around them.
- Place the primary action in the natural reading flow, not stranded at the bottom of a scroll.
- One primary action per screen. Everything else is secondary styling.
If a user has to work out which button is the one they want, the interface has already asked too much.
Section 05
5. Onboarding that charges before it delivers
Five tutorial screens, a mandatory account, and a permission prompt for notifications and location before the user has seen anything worth granting them for. The opposite failure is just as common: no guidance at all, and a first screen that assumes context the user does not have.
Onboarding is a trade. You are asking for effort and permissions in exchange for value. Asking first and delivering later inverts the deal, and a meaningful share of installs never recover from it.
- Show value before asking for an account. Let people use the thing, then offer to save their work.
- Request permissions in context, at the moment the feature needs them, with a reason.
- Keep any intro to two or three screens covering value, not a feature tour.
- Teach features when a user first reaches them rather than up front.
Section 06
6. Forms that ask for more than they need
Forms are where most mobile conversions are lost, and the causes are almost always mechanical rather than aesthetic. Too many fields, the wrong keyboard, validation that only fires on submit, and errors that describe the failure without saying how to fix it.
- Remove every field you do not need right now. You can ask for the rest later, in context.
- Set the correct input type so the right keyboard appears, and enable autofill for names, emails and one time codes.
- Validate as the user types and confirm success visibly, rather than waiting for submit to reject everything at once.
- Write errors that state the fix. Password needs at least 8 characters, not Invalid input.
- Preserve entered data on failure. Clearing a form after an error is the fastest way to lose someone.
Section 07
7. No loading, progress or confirmation feedback
The user taps and the screen does nothing. There is a request in flight but no sign of it, so they tap again, and now you have two submissions and a support ticket.
Perceived performance is largely a feedback problem rather than a speed problem. An action that takes two seconds and shows progress feels fine. The same two seconds in silence feels broken.
- Respond to every tap immediately with a pressed state, even if the result takes longer.
- Disable the button while a request is in flight so double submission is impossible.
- Use skeleton screens rather than spinners where you know the shape of what is loading.
- Confirm completion explicitly. Silence after success is as ambiguous as silence after failure.
Section 08
8. Inconsistency that quietly erodes trust
Three button styles, two shades of the same blue, and spacing that changes by screen depending on who built it. Users rarely name this, but they register it as unfinished, and unfinished reads as untrustworthy when money or personal data is involved.
Consistency also compounds in your favour. A pattern learned on one screen works on every other screen, so each new feature costs the user less attention than the last.
- Define tokens for colour, type, spacing and radius, and build components from them rather than styling screens individually.
- Write the rules down so a new contributor stays consistent without needing to ask.
- Audit all screens side by side periodically. Drift is easier to see in aggregate than in a pull request.
Section 09
9. Performance that users can feel
Janky scrolling, animations that stutter under load, and a cold start that leaves the user looking at a splash screen wondering whether the tap registered. Performance is not separate from experience. It is the part of the experience users notice first.
- Size and compress images for the screens they appear on, and use a modern format.
- Keep work off the main thread so scrolling and input stay responsive.
- Load progressively and lazily, so the first meaningful frame does not wait on the whole payload.
- Measure on the cheapest device in your target market. A recent flagship will hide every problem you have.
Section 10
10. Empty states, errors and edge cases left undesigned
A new user opens the app and sees an empty list with no explanation. A request fails and shows a raw error string. The network drops and the screen goes blank. These are common moments, not rare ones, and they usually get whatever the framework does by default.
An empty state is the highest intent screen in your app. Someone has arrived with nothing and is willing to be told what to do next. Wasting it is a real cost.
- Treat every empty state as an onboarding opportunity: explain what goes here and offer the action that fills it.
- Write errors in plain language with a next step and a way to retry.
- Handle offline explicitly. Say what is cached and when it was fetched rather than showing stale data as live.
- Test with a slow network, an empty account and unusual input. Those are your real first run conditions.
Section 11
Where to start if you can only fix three
Most teams cannot address all ten at once, and they do not need to. Three of them tend to account for the bulk of the recoverable conversion, so start there.
- Cut the form. Remove every non essential field from your highest intent flow and fix the keyboard and autofill behaviour.
- Fix feedback. Pressed states, disabled buttons during submission, and an explicit confirmation on completion.
- Give each screen one clear primary action, and demote everything competing with it.
Frequently asked questions
How do we know whether UI or UX is the reason our conversions are low?
Look at drop off by step. Conversion problems caused by interface issues concentrate on specific screens, usually a form or a permission prompt. If loss is spread evenly across the funnel, the problem is more likely positioning or audience than design.
How many fields should a mobile signup form have?
As few as let you deliver value, which for most products is one or two. Email plus a magic link or a single social sign in will generally outperform a name, email, password and confirmation, because each additional field is another chance to abandon. Collect the rest later, in context.
Is a design system worth it for a small app?
Yes, though it does not need to be elaborate. Tokens for colour, type and spacing plus a handful of shared components is usually enough. The cost of adding that later, once inconsistency has spread across thirty screens, is far higher than doing it at the start.
How much does performance actually affect conversions?
Enough to matter, and more on lower end devices and slower networks than the team's own phones suggest. Cold start and interaction latency are the two that users feel most directly. Both are worth measuring on real hardware from your target market rather than on a simulator.
