How to Write an App Brief a Developer Can Quote
Give a build partner enough detail to quote accurately, and avoid surprises later.
What a good brief contains
A build partner can only quote what they understand. A good brief covers the goal in two sentences, the users, each must-have job with the screens it needs, the connections, the data involved, any designs or examples, the expected scale and the target start date. Mark anything uncertain as an open question rather than guessing. Honest gaps get honest quotes.
- Goal and success measure
- Users and must-have jobs
- Connections and data
- Designs, examples or an existing app
- Scale and start date
- Open questions
Ask for a scoped pilot
If the idea is new, ask your partner for a scoped pilot: a fixed scope, a fixed price and a few weeks of work that prove the core job. Pilots reduce risk for you and your client, and the learning improves the main build. Many build partners, including XDQ Labs, quote pilots separately so clients can start small.
Read the quotation like a client would
Check that every must-have job appears in the quotation, that the timeline has milestones you can show your client, and that the advance and payment schedule fit your own cash flow. Ask what is excluded. Then add your margin and present your own quotation to the client in your brand, with the same milestones.
Worked example: from scope to quotation
An agency sent a brief for a patient booking portal: goal and success measure, three user types, six must-have jobs, payments and SMS connections, an existing website to match and four open questions, including whether clinics needed separate logins. The build partner asked two follow-up questions and returned a quotation with a scoped pilot for one clinic and milestones for design, build, testing and launch.
The agency checked every must-have job against the quotation, noted that hosting was excluded, added its margin and presented its own quotation to the client with the same milestones.
Common brief mistakes
Vague briefs produce vague quotes, padded for unknowns. Specific briefs produce tighter, more competitive quotes.
- Leaving out who the users are
- Hiding uncertainty instead of listing open questions
- Forgetting scale and start date
- Not asking what is excluded
- Include goal, users, jobs, connections, data and open questions.
- Mark uncertainty instead of guessing.
- Start new ideas with a scoped pilot.
- Check the quotation covers every must-have and states exclusions.
Turn your scope summary into a full brief using the checklist. Write at least three open questions. If you receive a quotation, mark every must-have job against it.
Check your understanding
1. How should uncertain items appear in a brief?
2. What is a scoped pilot?
3. What should you ask about every quotation?
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Templates from our playbooks
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