I see this confusion constantly in indie dev communities. Someone asks "how do I track which Instagram post drove sales?" and three people reply with "use Branch for deep linking." The person sets up deep linking, spends days configuring universal links, and still can't tell you which post drove a sale.
That's because deep linking and attribution solve completely different problems. Understanding the difference saves you from buying the wrong tool and wasting a week on setup you didn't need.
What deep linking actually does
A deep link takes a user to a specific place inside your app. Not the home screen. Not the App Store listing. A specific screen, product, or piece of content.
Say you're running a food delivery app. Someone gets a push notification: "Your favourite restaurant has a new menu." They tap it, and instead of landing on the app's home screen, they land directly on that restaurant's page. That's a deep link in action.
The technical bit: on iOS, this works through universal links. You register a domain, host an apple-app-site-association file, and configure your app to handle specific URL patterns. When someone taps a link matching those patterns, iOS opens your app and routes them to the right screen.
There's also deferred deep linking, which is where it gets clever. If someone clicks a deep link but doesn't have the app installed yet, a deferred deep link remembers where they wanted to go. After they install the app from the App Store, it routes them to that specific screen on first launch.
This is useful. Genuinely useful. If your app has lots of content or products and you want users to land on exactly the right page, deep linking is the right solution.
What attribution actually does
Attribution answers a different question entirely: where did this user come from, and did they spend money?
You're running an Instagram campaign, a TikTok account, and occasionally posting on Reddit. At the end of the month, you have 40 new purchases. Attribution tells you that 22 came from Instagram, 15 from TikTok, and 3 from Reddit.
It doesn't care what screen the user landed on. It doesn't route them anywhere. It tracks the journey: someone clicked a link, installed your app, and bought something. Then it connects that purchase back to the original link.
That's it. No routing. No universal links configuration. No apple-app-site-association files. Just a connection between a click and a purchase.
Where the confusion starts
The confusion exists because some tools do both. Branch, AppsFlyer, and Adjust all handle deep linking and attribution in the same platform. So when someone mentions any of these tools, people assume you need both features.
But here's the thing: most indie developers and small brands don't need deep linking at all. If your app has a straightforward flow — install, open, use, maybe buy something — there's no deep link destination that matters. The user opens the app and they're where they need to be.
What those developers actually need is attribution. They need to know whether the £50 they spent on a micro-influencer resulted in any sales. They need to know if their Reddit post performed better than their TikTok video. They need to know if they should double down on Instagram or abandon it.
A practical example
Let's say you've built a habit tracking app. You're doing organic marketing on three channels: Instagram, TikTok, and your personal newsletter.
With deep linking: Each link opens the app on a specific habit template. Your newsletter link opens the "Morning Routine" template. Your Instagram link opens the "Fitness" template. Clever, but it doesn't tell you which channel is driving revenue.
With attribution: Each channel gets a unique tracked link. All links go to the App Store. When someone installs and purchases premium, you see: newsletter drove 8 purchases, Instagram drove 3, TikTok drove 1. Now you know where to focus.
With both: Each channel gets a tracked, deep-linked URL. Users land on a specific template and you know which channel they came from. This is ideal but requires significantly more setup.
Most indie developers need the second option. Some need the third. Almost nobody needs the first one alone, but that's often what gets recommended.
When you actually need deep linking
Deep linking makes sense when your app has lots of distinct content that you want to share directly. Think:
- E-commerce apps where you're linking to specific products
- Content apps where you're sharing articles or videos
- Social apps where you're linking to user profiles or posts
- Multi-feature apps where a marketing campaign promotes one specific feature
If a user clicks your link and the ideal experience is landing on a specific screen rather than the home screen, you need deep linking.
When you just need attribution
Attribution alone makes sense when:
- Your app has a simple flow and there's no meaningful deep link destination
- You want to know which marketing channels drive purchases
- You're giving influencers or affiliates unique links to track their performance
- You're running campaigns across multiple platforms and need to compare results
- You're bootstrapped and need the fastest, cheapest way to measure what's working
This covers most indie developers and small brands. You're not linking to specific products inside your app. You're trying to figure out whether Instagram or TikTok is worth your time.
The cost difference matters
Tools that do both tend to price like enterprise products. Branch has a free tier but gets expensive at scale. AppsFlyer starts at around $700/month. Adjust doesn't even publish pricing publicly.
If you only need attribution, you're paying for deep linking features you'll never use. That's money that could go toward actual marketing.
Something like LinkOwl only does attribution. You create a tracked link, share it on whatever channel you want, and when someone clicks through to a purchase, you see which link drove it. 5p per attributed sale, no monthly fee. The setup takes about 15 minutes because there are no universal links to configure, no deep link routing to build, and the SDK is tiny.
If you need deep linking too, Branch or a similar tool is probably worth the complexity. But don't set up deep linking when all you needed was a way to count purchases per channel.
How to decide what you need
Ask yourself two questions:
Does the user need to land on a specific screen when they tap my marketing link? If yes, you need deep linking. If they just need to get to the App Store and install your app, you don't.
Do I need to know which marketing channel or campaign drove each purchase? If yes, you need attribution.
If the answer is "just attribution," don't overcomplicate it. Pick a tool that does attribution and skip the deep linking setup entirely. You can always add deep linking later if your app grows into it.
The bottom line
Deep linking is about where the user goes. Attribution is about where the user came from. They're complementary but independent. Knowing the difference means you pick the right tool for the actual problem you're solving, instead of spending a week configuring universal links when all you wanted was a purchase count next to each marketing link.