How to choose a mobile app marketing agency

Define the assignment first

Companies often begin with a vague request to "promote the app." One team needs a launch in a new country, another has broken measurement, and a third lacks creative production. Each problem calls for different skills and a different budget.

Write down the target event, markets, current channels, monthly spend, and primary risk. Agencies can then propose a realistic scope, and you have a consistent basis for comparing them.

How to read case studies

A growth percentage without a baseline proves very little. A useful case names the period, geography, channels, constraints, and business metric. Ask how much of the outcome came from agency work and how much came from product changes, seasonality, or extra budget.

You do not need a case from an identical app. Similar economics, growth stage, and funnel complexity often matter more. Multi-country subscription experience may be more relevant than a famous case in your category with a different revenue model.

Questions for the first meeting

• How will you verify measurement before launch?
• Which event will guide optimization, and why?
• How many new creative hypotheses can you produce each month?
• Who owns and can access the accounts and source files?
• What does reporting look like, and who explains the decisions?
• Under what conditions would you stop a campaign?

A strong answer includes a sequence and explicit assumptions. If every question returns to a promise of low costs, ask to see the calculation behind it.

Fees and ownership

A retainer works for a defined, ongoing scope. Percentage-of-spend pricing can make sense for continuous management of a large budget, but it should not reward higher spend without quality. Performance fees need an agreed data source and a precise definition of success.

The client should retain access to ad accounts, pixels, audiences, analytics, and creative source files. Put the handover process and notice period in the agreement.

Warning signs

• A guaranteed result before the agency can inspect the data.
• A proposal to run media through the contractor's personal account.
• Reporting limited to impressions, clicks, and CPI.
• No plan to test events and deep links.
• The same media plan for different countries and products.
• Reluctance to explain why a decision was made.

Listen for another warning: the agency discusses only traffic even when the real constraint may sit in the store page, onboarding, or payment flow.

Run a controlled trial period

Set objectives for 60 or 90 days, then divide the work into stages. The agency first verifies data and builds a hypothesis backlog. It then runs limited tests. Scaling follows only after both sides agree that quality has been demonstrated.

Do not judge the relationship only by final CPA. Look at response time, change transparency, the quality of conclusions, and the team's willingness to acknowledge uncertainty. Those traits determine whether the partnership survives a difficult quarter, not just a lucky week.