You can startsetting appropriate expectations andimpressing the usersooner than you think: Have a clean, beautiful and guideline-friendly icon Have a unique and appropriate listing title Have an honest and useful listing description
You don’t always have control over thefirst impression. Press and word-of-mouth reviews User’s previous exposure to your brand Market ratingsImproving the quality of your app will help positivelyinfluence these factors.
Once your app is installed,get the user up and runningas quickly as possible. Don’t require a lengthy registration process – Users hate typing on mobile devices Sync user data and context immediately – Users shouldn’t have to recreate their desktop environment on their mobile phone
Your ‘home’ activity should be straightforward. It’s also an opportunity to show off available features, in ahighly aesthetic, consistent, yet brand-faithful way.
In some cases, your appmay call for a unique userinterface.In these cases, considergreeting the user andeducating them on the UI.Make them feel comfortablewith your app.Example:Winamp for Android
Greeting the user witha one-time tutorialscreen can alsoinform them about appfeatures like widgets,live wallpapers, orglobal search
DON’T simply port your DON’T use px units, UI from other platforms use dp (sp for text) DON’T overuse modal DON’T use small font progress & sizes confirmation dialogs DO make large, DO support D-pad & obvious tap targets trackball navigation (buttons, list items) DO properly manage DO use proper margins the activity stack and padding DO properly handle orientation changes