App Development & Marketing Agency · 3 Nov 2026 · 7 min read · By Amit Kumar Sharma

Why hire one agency for app development and marketing (and what to check first)

Most apps don't fail in development. They fail in the 90 days after launch. Here's when one team for build and growth makes sense, and how to vet them.

Key takeaways

Most of the risk in an app sits after launch, in getting users, not in writing code.
One team for build and growth removes the handoff where analytics, events and store listings usually break.
Check that the agency can show real campaign accounts and real shipped apps, not just a portfolio page.
Agree on launch KPIs (cost per install, cost per signup or purchase, day-7 retention) before development starts.

Most founders hire a developer, ship the app, then go looking for a marketer. By the time the marketer arrives, a lot of the decisions that decide whether paid growth will work have already been made: which events are tracked, how onboarding flows, what the store listing says, whether deep links exist at all. A combined app development and marketing agency exists to close that gap.

This guide covers when one team for both jobs is the right call, when it isn't, and the exact questions to ask before you sign.

The real problem: the handoff between build and growth

An app can be well built and still be impossible to market profitably. The usual reasons have nothing to do with code quality:

Missing or wrong in-app events. Google App Campaigns, Meta and Apple Search Ads all optimize toward events you send them (signup, trial start, purchase). If those events aren't instrumented on day one, campaigns can only optimize for installs, which is the most expensive way to buy users who never come back.
No attribution setup. Without a mobile measurement partner (AppsFlyer, Adjust, Branch or Firebase plus SKAdNetwork on iOS) you can't tell which channel actually produced paying users.
Onboarding built for demos, not conversion. Long signup forms, permission prompts on the first screen and no value before registration all raise your cost per acquisition.
A store listing written by the developer. Screenshots and copy decide your install rate from both ads and search. They are marketing assets, and usually get treated as an afterthought.

When the people building the app are also accountable for the cost of the first thousand users, these things get done during development, when they're cheap, instead of after launch, when they mean a new sprint.

What a combined agency should actually deliver

"We do development and marketing" is on half the agency websites on the internet. Here is what the work should include if it's real.

During development

A tracking plan: the list of events, their parameters and which ones will be used for campaign optimization.
SDK integration for your analytics and attribution tools, with test events verified before launch.
Deep links that open the right screen from an ad, email or push notification.
An onboarding flow designed around the first moment of value, not around collecting data.

At launch

App Store and Google Play submission, including privacy labels, data safety forms and review-ready builds.
Store listing: keyword research, title and subtitle, screenshots and a preview video.
A first campaign set on the channels that fit your audience, with a small test budget and clear stop/scale rules.

After launch

Weekly reporting on cost per install, cost per key event and early retention, by channel.
Creative testing: new ad concepts every week or two, because creative fatigue is the most common reason campaigns stall.
A product feedback loop: drop-off points in the funnel go back to the development backlog.

When one agency is the right choice

A combined team tends to work best when:

You're launching a new app and don't have an in-house growth person yet.
Your budget can't support two vendors plus the time it takes you to coordinate them.
Speed matters: you want to launch and start learning from paid traffic within weeks, not quarters.
Your app's success depends on a measurable funnel, for example a subscription, marketplace, fintech or ecommerce app.

Get a fixed quote for your app in 24 hours

Tell us what you're building. You get a written scope, timeline and fixed price — plus free Google Play and App Store submission and one month of launch marketing with every build.

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When you should split the work

Be honest with yourself here. Separate vendors make more sense when:

You already spend heavily on paid acquisition and have a mature in-house growth team. You need a specialist build partner, not a generalist.
Your app is mostly an internal tool or a companion to an existing business, with little or no paid acquisition planned.
The agency is clearly strong at one side and thin on the other. A great dev shop with one junior media buyer is not a combined agency.

How to vet an app development and marketing agency

Ask these questions on the first call. Good answers are specific; weak answers are adjectives.

Ask	A good answer sounds like
Show me apps you've shipped that are live in the stores.	Store links you can open now, plus what they personally built.
Which ad accounts have you managed, and at what monthly spend?	Named channels (Google App Campaigns, Meta, Apple Search Ads), spend ranges and the KPI they optimized for.
What events will you track, and which will campaigns optimize for?	A concrete list tied to your business model, not "we'll add Firebase".
Who owns the code, the store accounts and the ad accounts?	You do. Everything is created under your company, with the agency added as a user.
How do you price development and marketing?	A fixed price for a defined build scope, and a clear monthly fee or percentage for marketing, kept separate from ad spend.
What happens if the first campaigns don't hit target?	A testing plan: which levers they'll pull (creatives, events, audiences, onboarding) and when they'd recommend pausing.

One more red flag: an agency that guarantees a number of installs or a cost per install before seeing your app, audience and country mix. Nobody can promise that honestly.

A simple 90-day launch timeline

Here is how the first three months typically look when one team owns both the build and the launch:

Weeks 1–2: scope, wireframes, tracking plan and the store listing draft. The KPIs for launch are agreed here, in writing.
Weeks 3–10: design and development in weekly or fortnightly releases, with analytics events tested in every build rather than bolted on at the end.
Weeks 10–12: QA, store submission, soft launch to a small audience and the first paid test campaigns on one or two channels.
Month 4 onward: scale the channel that hits your target cost per key event, cut the one that doesn't, and feed funnel drop-offs back into the product backlog.

Simpler apps move faster and complex ones take longer, but the order matters more than the dates: measurement first, then traffic, then scale.

What it costs

Pricing varies widely by scope and country, so treat these as planning structures rather than quotes:

Development is usually quoted as a fixed price for a defined scope (common for MVPs) or a monthly fee for a dedicated team. Offshore teams, for example in India, typically cost a fraction of US agency rates for comparable work. Our app development cost guide breaks down what drives the price.
Marketing is usually a monthly management fee or a percentage of ad spend, plus the ad spend itself, which you pay directly to Google, Meta or Apple.
Launch budget: plan a separate test budget for the first four to eight weeks of campaigns. Its job is to find out what a user costs on each channel, not to scale.

How Appryze works

Appryze is a Delhi-based team that builds Android, iOS and web apps for clients in the USA, UK, UAE and India, and markets them after launch. Our founder has spent over a decade running user acquisition for consumer and fintech apps on Google App Campaigns, Meta and Apple Search Ads, so the growth side is built into the project from the first sprint.

Fixed-price quote with a written scope within 24 hours.
Tracking plan, attribution SDK and deep links included in every build.
Free Google Play and App Store submission.
One month of launch marketing included, so your first campaigns run on accounts set up the right way.
You own the code, the store accounts and the ad accounts.

If you're comparing options, read how to choose an app development company and our app launch marketing plan next, or see what we do on the Studio and Growth pages.

Frequently asked questions

Is it better to hire one agency for app development and marketing?

For most new apps without an in-house growth team, yes. One team removes the handoff where tracking, deep links and store listings usually break, and makes the people building the app accountable for the cost of getting users. If you already have a strong in-house growth team, a specialist development partner is often the better fit.

How much does an app development and marketing agency cost?

Development is usually a fixed price for a defined scope or a monthly fee for a dedicated team. Marketing is usually a monthly management fee or a percentage of ad spend, plus the ad spend you pay directly to Google, Meta or Apple. Offshore teams, for example in India, typically cost far less than US agencies for comparable work.

Who should own the app code and ad accounts?

You should. The code repository, App Store and Google Play developer accounts, and ad accounts should all be created under your company, with the agency added as a user. That way you can change vendors without losing anything.

Can an agency guarantee app installs?

No honest agency can guarantee installs or a cost per install before testing your app in your target countries. What they can commit to is a testing plan, transparent reporting and clear rules for when to scale or stop spending.

Does Appryze work with clients in the USA?

Yes. Appryze builds and markets apps for clients in the USA, UK, UAE and India, with call times that overlap US business hours and written updates every week.