To create web apps that feel native on mobile, the most crucial design principle is aggressive reductionism. Vercel founder Guillermo Rauch's advice is to "delete, delete, delete, delete" every non-essential UI element to force clarity and respect the user's fleeting attention span.
Reducing the number of clicks is a misguided metric. A process with eight trivially easy clicks is better than one with two fraught, confusing decisions. Each decision burns cognitive energy and risks making the user feel stupid. The ultimate design goal should be to prevent users from having to think.
The original Google Maps redesign simplified five search boxes into one. Years later, the app is again cluttered. This illustrates a natural product lifecycle: feature expansion leads to clutter, which necessitates a periodic, principles-based simplification to refocus on core user needs.
The "Owner's Delusion" is the inability to see your own product from the perspective of a new user who lacks context. You forget they are busy, distracted, and have minimal intent. This leads to confusing UIs. The antidote is to consciously step back, "pretend you're a regular human being," and see if it still makes sense.
Not all parts of an application require the same level of design polish. Founders must develop an "editorial eye" to invest heavily in the core user experience (a 9/10) while accepting "good enough" for less critical areas like settings pages (a 5/10).
Forcing users to focus on a single, non-scrollable view with a simple form eliminates distractions. This tactic simplifies the user experience by preventing users from getting lost in supplementary information, leading to a significant increase in conversion rates.
When products offer too many configurations, it often signals that leaders lack the conviction to make a decision. This fear of being wrong creates a confusing user experience. It's better to ship a simple, opinionated product, learn from being wrong, and then adjust, rather than shipping a convoluted experience.
Instead of building UI elements from scratch, adopt modern libraries like Tailwind's Catalyst or Shad CN. They provide pre-built, accessible components, allowing founders to focus engineering efforts on unique features rather than reinventing solved problems like keyboard navigation in dropdowns.
Avoid the 'settings screen' trap where endless customization options cater to a vocal minority but create complexity for everyone. Instead, focus on personalization: using behavioral data to intelligently surface the right features to the right users, improving their experience without adding cognitive load for the majority.
Instead of traditional PRDs, Robinhood starts product development by designing the four introductory 'swipey' screens a user sees. This mobile-first approach forces the team to succinctly summarize the product's value proposition from the customer's perspective before any code is written.