What challenges developers may face in the absence of a design review:
All these flaws will either lead to new revisions on the layout, which can increase the development time, or bugs and gaps will be eliminated by the developers themselves, which may not comply with the guideline, break from the design style and subsequently mess up the user experience.
Not all states of elements are drawn
The requirements of iOS and Android platforms are not met
User scenarios are not fully developed
Proposed design solutions have high implementation complexity in code
Layout was created without grids, distances are set by eye
Interaction logic is broken
There is no design system: a set of rules, tools, and specifications for interface elements that will help reuse these components between different screens