Mobile design is constrained in ways web design is not: platform conventions users already know, screen sizes that vary more than designers assume, one hand operation, interruptions, and store rules that make certain patterns mandatory. A design that ignores these is expensive to implement and unfamiliar to use.
An Android app design agency must respect platform conventions or you pay for the difference
Each platform has established patterns for navigation, back behaviour, sharing and system controls, and users have learned them elsewhere. A design that invents its own versions costs more to build, more to maintain as platforms change, and makes your product feel subtly wrong. Deviating is sometimes justified for a genuinely distinctive interaction, and it should be a deliberate, argued decision rather than the default of a designer thinking in web terms.
Design the device range, not the showcase device
Ask what screen sizes the design covers, including small and older handsets, and how it behaves at the largest accessibility text sizes, which is where fixed height layouts break and text truncates into meaninglessness. Reachability matters too: primary actions placed where a thumb cannot reach on a large phone get used less. Require the design to be shown on a small device at large text before it is approved.
Every state has to be designed
Empty, loading, partial, error, offline, permission denied, and content much longer than the example text. These are most of what users actually encounter on mobile, where connections drop and permissions are refused, and they are routinely left to developers to invent at the end. Require them in the deliverable. A design that only covers the ideal path is perhaps half of the work priced as all of it.
Some patterns are required by the store
Apple's App Store Review Guidelines impose design obligations directly: in app account deletion where account creation is offered, permission requests that explain themselves, subscription disclosure, and for user generated content a way to filter objectionable material, report it and block abusive users. These are design work and cheaper to include from the start than to bolt on after a rejection during a release week.
Questions people ask about mobile application design agency
Should a mobile app follow platform conventions?
By default, yes. Users have learned navigation, back behaviour and sharing patterns elsewhere, and inventing your own costs more to build and maintain while feeling subtly wrong. Deviate only as a deliberate, argued decision.
What is most often missing from mobile app design services?
The states: empty, loading, partial, error, offline, permission denied and overlong content. They are most of what users actually encounter, and leaving them to developers means they get invented under deadline.
Do app stores impose design requirements?
Yes. In-app account deletion where accounts are offered, self-explaining permission requests, subscription disclosure and, for user generated content, filtering, reporting and blocking. All are design work best included from the start.