Open with the reason this software should exist, not a list of screens. Which people will use this, with what frequency, and what happens today? An experienced team who understands the goal will suggest a simpler way to reach it; one who only sees a list of screens can only price your assumptions along with the work.
Define what is included as short scenarios: a walk through each important path. Equally important, list what the first release deliberately excludes. An explicit exclusion list saves more friction at delivery time than the rest of the brief combined. Indicate as well which items are decided and custom react development which may still change — the difference changes the price, and pretending everything is fixed helps no one.
Set out your constraints. These include the platforms and services involved, the data you have and where it lives, security and compliance rules, kotlin development agency user volumes, which devices matter and infrastructure that is already decided. Where a date is genuinely fixed, explain what drives it: an experienced team will often cut the right scope to protect it, but only if they know it exists.
Write down what the word done means for the important items. Clear acceptance criteria need not use any formal notation: a plain-language note setting out what must be true when the feature works will do. This single habit reduces the review at the end considerably and eliminates the usual argument at handover.
To close, state what you want ai in custom software development the response. Require a task-level breakdown, the assumptions behind each number, the main risks and an optimistic and a pessimistic figure. Read a wide range as information, not evasion: it normally identifies exactly which requirement is unclear. At that point tighten that section and ask again — the next version will be the one worth planning around.