Open with the reason this software development company in dubai should exist, not a feature list. Which people will use this, with what frequency, ios aso agency and how is the job done today? An experienced team who knows what you are trying to achieve can propose a cheaper route to it; a team that receives only a list of screens prices the list as written.
Describe the scope as concrete flows: a walk through each important path. Just as important, list what the first release deliberately excludes. A written out-of-scope list saves more disagreement later than the rest of the brief combined. Indicate as well which items are decided and which may still change — the difference changes the price, and pretending everything is fixed helps no one.
List the constraints. These include the platforms and services involved, existing databases and their quality, regulatory obligations, user volumes, target platforms and any technology you are committed to. If a deadline is real, explain what drives it: a good team is usually able to resequence the work to hit it, provided they hear about it early.
Say what completion means for the important items. Testable acceptance criteria do not require formal language: a short paragraph describing what must be true when the feature works is enough. This single habit compresses acceptance testing dramatically and eliminates most late-stage disagreement.
One last thing, say what you expect back. Require an itemised estimate, the assumptions behind each number, the main risks and a range rather than a single figure. Treat a wide range as information, not evasion: it normally identifies exactly which requirement is unclear. Then rewrite that part and ask for aws development services a new estimate — the revised figure tends to be far closer to reality.