Web & Mobile Development

How to Write a Mobile App Requirements Document

A simple way to turn your app idea into a requirements document that developers can price and build, with a template for UAE projects.

Rahul Mathur · 2 min read
Illustration of a smartphone showing an app interface for the article: How to Write a Mobile App Requirements Document
In this article
  1. Why bother?
  2. What goes in it
  3. A simple template
  4. Don't aim for perfect

The fastest way to get a bad quote is to send a developer one line: "I want an app like Careem." You'll get wildly different numbers back, and none of them will be right. A short requirements document fixes that. It doesn't need to be technical. It just needs to answer a handful of honest questions.

Why bother?

Because developers price what they can see. If your idea lives only in your head, every agency fills the gaps with guesses, and the cheapest guess usually wins until the invoices start. A clear document means you compare like with like, and it saves weeks of back and forth once the project starts.

What goes in it

1. The goal, in two sentences

Who is this for, and what should it do for them? "Help homeowners in Dubai book a trusted cleaner in under a minute" is useful. "Be the best cleaning app" isn't.

2. Your users

List each type of person who will touch the product. A delivery app usually has customers, drivers, and an admin who manages everything. That's three products, not one, and it changes the price a lot.

3. The must-have features

Write the things the app can't launch without. Then, separately, write the nice-to-haves. Be strict. Every feature in the first list adds time and cost, and the second list is your roadmap for version two. Our guide on building an app for a UAE startup shows how to draw that line.

4. Integrations

Payments, maps, SMS, your CRM, your accounting system, a government or partner service. Name them. Integrations are a classic source of surprises, so the earlier they appear, the better. If payments are involved, read up on UAE payment options first.

5. Languages and platforms

Arabic, English or both? iPhone, Android or both? Both languages need right-to-left layouts, which is easier to plan from day one, as explained in our Arabic localisation guide.

6. Examples you like and dislike

Screenshots beat paragraphs. Collect three apps you admire and say why. Add one you can't stand and say why that too.

7. Budget range and timing

Yes, share it. A range lets the developer suggest what's realistic instead of quoting a fantasy. Typical timelines are in how long it takes to build a mobile app.

A simple template

SectionWrite down
GoalTwo sentences on who it's for and what it solves
UsersEach type of user and what they do
Must-havesFeatures needed at launch
LaterIdeas for version two
IntegrationsPayments, maps, SMS, other systems
Languages and platformsArabic, English, iOS, Android
ReferencesApps you like and dislike
Budget and dateA range and a target month

Don't aim for perfect

A two-page document you finish today beats a forty-page one you never send. Your developer will ask questions and tighten it during discovery. What matters is that you've thought through the basics before the meeting. When you're ready, send it through our contact page and we'll reply with a scope and a clear quote.

Frequently asked questions

How long should a requirements document be?

Two to five pages is plenty to get accurate quotes. Clarity matters more than length.

Do I need technical knowledge to write one?

No. Describe your goal, your users and the features you need in plain language. Your developer will refine it.

Should I include my budget?

Yes. A budget range helps a developer suggest what is realistic instead of guessing.

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