# UTM Builder for Mobile Apps

> Build UTM parameters for mobile app deep links and campaigns. Track campaign performance across iOS, Android, and web — free, no signup.

- Canonical: https://redirectly.app/tools/utm-builder
- Site: [Redirectly](https://redirectly.app) — deferred deep linking for Flutter & React Native

Create trackable campaign links with UTM parameters. Build URLs for iOS, Android, and web campaigns. See real-time platform behavior and previews.

## Build your campaign link

This is an interactive tool: enter a base URL (or deep link like `myapp://products`), the required UTM parameters (utm_source, utm_medium, utm_campaign), and optionally utm_term and utm_content at [https://redirectly.app/tools/utm-builder](https://redirectly.app/tools/utm-builder). The tool generates a properly URL-encoded campaign link you can copy to your clipboard.

## See how your campaign link behaves

Your campaign link behaves differently depending on the platform:

**iOS Behavior** — On iOS, if your app supports Universal Links:

1. iOS checks if the domain is associated with your app (via AASA file)
2. If associated, the app opens directly with UTM params intact
3. If not associated, link opens in Safari mobile browser
4. UTM data is captured in your analytics dashboard

**Android Behavior** — On Android, if your app supports App Links:

1. Android verifies the domain association (via assetlinks.json)
2. If verified, the app opens directly with UTM params intact
3. If not verified, link opens in Chrome or default browser
4. UTM data is captured in your analytics dashboard

**Web Browser Behavior** — On desktop or in web browsers:

1. Link opens in default web browser
2. UTM parameters are sent to your server via query string
3. Your analytics platform (GA4, etc.) automatically captures UTM data
4. Users see the content with full tracking context

## What are UTM parameters?

UTM (Urchin Tracking Module) parameters are simple text tags you add to URLs that help you track the performance of your marketing campaigns. They tell your analytics platform where traffic came from, what channel it used, and which campaign it belonged to.

**Before UTM Parameters:**

```text
https://example.com/products
```

You can see that traffic came to your site, but have no idea which campaign drove it or what channel it came from.

**With UTM Parameters:**

```text
https://example.com/products?utm_source=facebook&utm_medium=paid&utm_campaign=summer_sale
```

Now you know the traffic came from Facebook, via paid ads, as part of your summer sale campaign.

### utm_source

Identifies where the traffic came from. Required. Examples: google, facebook, instagram, email, newsletter

### utm_medium

Describes the type of marketing channel. Required. Examples: cpc, email, organic, paid, social, referral

### utm_campaign

Names the campaign for analysis. Required. Examples: summer_sale, q1_promo, welcome_series

### utm_term

Identifies paid search keywords. Optional, mainly for PPC campaigns. Examples: running shoes, best_pizza, mobile_apps

### utm_content

Distinguishes different ads or versions within a campaign. Optional, useful for A/B testing. Examples: banner_v1, cta_button_blue, email_subject_a

## UTM parameters with mobile deep links

UTM parameters work perfectly with mobile deep links. When you add UTM parameters to a deep link, your app receives the campaign tracking data, allowing you to understand which campaigns drive the most valuable traffic.

### Mobile Deep Link with UTM Parameters

Example 1: iOS Universal Link

```text
https://myapp.example.com/products/shoes?utm_source=instagram&utm_medium=paid&utm_campaign=summer_sale
```

Example 2: Android App Link

```text
https://myapp.example.com/checkout?item=shoes&utm_source=google&utm_medium=cpc&utm_campaign=q1_2024
```

Example 3: Custom Scheme Deep Link

```text
myapp://products/shoes?utm_source=email&utm_medium=newsletter&utm_campaign=weekly
```

### Mobile App Tracking Flow

1. User sees your ad (Instagram, email, etc.)
2. They tap the deep link with UTM parameters
3. Your app receives the full URL with UTM data
4. Your analytics SDK captures the UTM parameters
5. Data is sent to your analytics platform (GA4, Mixpanel, etc.)
6. You can measure campaign ROI and optimize future campaigns

### Why UTMs Matter for Apps

- Track which campaigns drive the most installs
- Measure the quality of traffic from each source
- Optimize ad spend across channels
- Build cohorts of users from specific campaigns
- Understand user retention by acquisition channel

## UTM best practices for mobile apps

### 1. Use consistent naming conventions

Establish a naming standard for your organization and stick to it. Use lowercase, avoid spaces, and use underscores or hyphens to separate words.

Good examples:

```text
utm_source=google, utm_medium=cpc, utm_campaign=summer_sale_2024
utm_source=instagram, utm_medium=paid, utm_campaign=product_launch
```

### 2. Never use spaces or special characters

Spaces and special characters can break URLs or get encoded differently across platforms. Always URL-encode parameters properly.

- Bad: `utm_campaign=summer sale 2024`
- Good: `utm_campaign=summer_sale_2024`

### 3. Document your UTM strategy

Create a shared document with your team defining what each UTM parameter means. This ensures consistency and makes reporting easier.

Example UTM strategy:

- utm_source: Which platform (google, facebook, email, etc.)
- utm_medium: Channel type (cpc, organic, email, social, referral)
- utm_campaign: Campaign identifier (summer_sale, q2_launch, etc.)
- utm_content: Test variant (banner_v1, email_variant_a, etc.)

### 4. Test UTM parameters before launching

Use the [Deep Link Tester tool](https://redirectly.app/tools/deep-link-tester.md) to verify that your UTM parameters are being captured correctly by your app.

### 5. Keep UTM parameters short

Long URLs can be ugly and hard to share. Some platforms have URL length limitations. Keep values concise while still being descriptive.

### 6. Don't over-complicate the structure

You don't need to include every bit of metadata in UTM parameters. Focus on the main dimensions you'll actually analyze and act on.

## Build and track campaigns at scale

Use Redirectly to build, manage, and track all your campaign links in one place:

- [Use: Deep Link Generator](https://redirectly.app/tools/deep-link-generator.md)
- [Test: Deep Link Tester](https://redirectly.app/tools/deep-link-tester.md)
- [Learn: UTM Parameters Guide](https://redirectly.app/blog/utm-parameters-mobile-apps.md)

## Frequently asked questions

### What are UTM parameters?

UTM (Urchin Tracking Module) parameters are text tags you add to URLs to track campaign performance. They help your analytics platform understand where traffic came from, what marketing channel it used, and which campaign it belonged to.

### How do UTM parameters work with mobile deep links?

When a deep link with UTM parameters is tapped, your app receives the full URL including the UTM data. Your analytics SDK then captures these parameters and sends them to your analytics provider for tracking.

### What UTM parameters are required?

The three essential parameters are utm_source (where traffic came from), utm_medium (type of marketing channel), and utm_campaign (campaign name or ID). The other two parameters (utm_term and utm_content) are optional.

### Can I use the same UTM parameters across web and app links?

Yes! Using consistent UTM parameters across web and app campaigns helps you track user behavior across different channels. Your analytics platform will combine the data for a holistic view.

### How do I view UTM data in my analytics platform?

This depends on your analytics platform (GA4, Mixpanel, Amplitude, etc.). Most platforms have built-in reports for UTM parameters. Your mobile analytics SDK automatically captures and sends the UTM data from deep links.

---

Full site index for AI agents: https://redirectly.app/llms.txt