Begin with the reason this russia software development agency should exist, not a list of screens. What kind of user will use this, with what frequency, and what does the process look like without it? An experienced team who understands the goal often proposes a cheaper route to it; one who only sees a feature list will price the list as written.
Set out the scope as short scenarios: what the user does and what the system does in response. Every bit as useful, state explicitly what the first release deliberately excludes. A written out-of-scope list saves more disagreement later than almost anything else in the document. Mark too which decisions are settled and which are still under discussion — estimators price uncertainty, and pretending everything is fixed helps nobody.
Write down the hard constraints. The list covers systems you must integrate with, the data you have and where it lives, regulatory obligations, expected load, target platforms and any technology you are committed to. If a deadline is real, explain what drives it: an experienced team can often cut the right scope to protect it, but not if the date is a secret.
Define what done means for the important items. Acceptance criteria need not use formal language: a plain-language note stating what a user should be able to do will do. This single habit reduces the review at the end considerably and closes off most late-stage disagreement.
One last thing, say what you expect back. Ask for an itemised estimate, the assumptions behind each number, whatever the team considers risky and top laravel development companies a low number and a high number. Treat a wide range as useful information rather than evasion: it normally identifies exactly which requirement is unclear. Then clarify that area and request a revised number — the second estimate will be the one worth planning around.