Fix Your App: KPIs and User Testing for Mobile Success

Is your app a joy to use, or a source of frustration? The end user experience of their mobile and web applications can make or break a business, and improving it doesn’t have to be a shot in the dark. What if you could pinpoint exactly where users are struggling and fix it with concrete steps?

1. Define Your Key Performance Indicators (KPIs)

Before you start tweaking anything, you need to know what “good” looks like. What metrics will tell you if the end user experience of their mobile and web applications is improving? Here are a few essential KPIs to track:

• App Load Time: How long does it take for the app to become fully functional after launch?
• Crash Rate: How often does the app crash per user session?
• Session Length: How long do users spend in the app on average?
• Conversion Rate: What percentage of users complete a desired action (e.g., purchase, sign-up)?
• User Retention Rate: What percentage of users return to the app after a certain period (e.g., 7 days, 30 days)?

We use Datadog to monitor these KPIs across all our client’s apps. It gives us a centralized view of performance and allows us to drill down into specific issues. We’ve found that Datadog proactive monitoring is essential for our clients.

Pro Tip: Don’t try to track everything at once. Focus on 2-3 KPIs that are most relevant to your business goals.

2. Conduct User Testing

Numbers only tell part of the story. To truly understand the end user experience of their mobile and web applications, you need to observe real users interacting with your app. There are a few ways to do this:

• Usability Testing: Ask users to complete specific tasks in your app while you observe their behavior. Pay attention to where they struggle, get confused, or make mistakes.
• Surveys: Collect feedback from a larger group of users through surveys. Ask about their overall satisfaction, ease of use, and any pain points they encountered.
• In-App Feedback: Implement a feature that allows users to provide feedback directly within the app. This can be as simple as a “Report a Problem” button.

For usability testing, we use UserZoom. It allows us to record user sessions, track eye movements, and gather quantitative data on task completion rates and time on task.

Common Mistake: Only testing with internal employees. They are already familiar with the app and won’t provide the same insights as new users.

3. Analyze App Performance with Profiling Tools

Once you’ve identified areas for improvement, you need to understand why those issues are occurring. App profiling tools can help you pinpoint performance bottlenecks and identify areas where your code is inefficient. Some popular options include:

• Android Profiler (Android Studio): Built-in profiling tools for Android apps.
• Instruments (Xcode): Built-in profiling tools for iOS apps.
• Chrome DevTools (for web applications): Powerful debugging and profiling tools for web apps.

Let’s say you’re noticing slow load times in your Android app. Using the Android Profiler, you can analyze CPU usage, memory allocation, and network activity to identify the root cause. Look for long-running tasks, excessive memory consumption, or inefficient network requests.

Pro Tip: Profile your app on a variety of devices, including older models with limited resources. This will help you identify performance issues that may not be apparent on high-end devices.

4. Optimize Images and Assets

Large images and assets can significantly impact app load time and performance. Optimizing these assets is a simple but effective way to improve the end user experience of their mobile and web applications.

• Compress Images: Use image compression tools like TinyPNG to reduce the file size of your images without sacrificing quality.
• Use Appropriate Image Formats: Use WebP for web applications and optimized formats like JPEG or PNG for mobile apps.
• Lazy Loading: Load images and assets only when they are needed, rather than loading everything at once.

I had a client last year who was complaining about slow load times in their e-commerce app. After analyzing their assets, we discovered that they were using unoptimized images that were several megabytes in size. By simply compressing these images, we were able to reduce the app load time by over 50%.

5. Minimize Network Requests

Each network request adds latency and can slow down your app. Minimizing the number of network requests is crucial for improving performance. If you’re feeling overwhelmed, smart choices for confident business can help.

• Bundle Requests: Combine multiple requests into a single request whenever possible.
• Cache Data: Cache frequently accessed data locally to reduce the need for network requests.
• Use a Content Delivery Network (CDN): CDNs can help deliver content to users faster by caching it on servers located around the world.

We use Amazon CloudFront for our CDN needs. It’s reliable, scalable, and integrates well with our existing infrastructure.

6. Optimize Database Queries

Slow database queries can be a major performance bottleneck, especially in data-intensive applications. Optimizing your database queries is essential for improving the end user experience of their mobile and web applications.

• Use Indexes: Indexes can significantly speed up database queries by allowing the database to quickly locate the data you need.
• Optimize Query Structure: Write efficient queries that only retrieve the data you need. Avoid using “SELECT *” and instead specify the columns you want to retrieve.
• Use Caching: Cache frequently accessed query results to reduce the load on your database.

Common Mistake: Neglecting to use indexes on frequently queried columns. This can lead to full table scans, which are extremely slow.

7. Monitor and Iterate

Improving the end user experience of their mobile and web applications is an ongoing process. You need to continuously monitor your app’s performance, gather user feedback, and make adjustments as needed.

• Set up Monitoring Alerts: Configure alerts to notify you when key performance metrics fall below acceptable thresholds.
• Regularly Review User Feedback: Pay attention to user reviews, support tickets, and in-app feedback to identify areas for improvement.
• A/B Testing: Experiment with different UI designs and features to see what works best for your users.

We ran into this exact issue at my previous firm. We had a mobile banking app that was experiencing a high crash rate. After analyzing the crash reports, we discovered that the crashes were occurring primarily on older devices with limited memory. We optimized the app’s memory usage and released an update, which significantly reduced the crash rate and improved the end user experience of their mobile and web applications.

8. Code Splitting for Web Applications

For web applications, code splitting is a technique that allows you to break your code into smaller chunks that can be loaded on demand. This can significantly improve the initial load time of your app, especially for large and complex applications.

• Route-Based Splitting: Split your code based on the different routes or pages in your application.
• Component-Based Splitting: Split your code based on the different components in your application.

Most modern JavaScript frameworks like React and Angular provide built-in support for code splitting.

Pro Tip: Use tools like Webpack to automate the code splitting process.

9. Minify and Compress Code

Minifying and compressing your code can significantly reduce the file size of your JavaScript, CSS, and HTML files. This can lead to faster load times and improved performance.

• Minification: Remove unnecessary characters (e.g., whitespace, comments) from your code.
• Compression: Compress your code using tools like Gzip or Brotli.

Again, tools like Webpack can automate the minification and compression process.

10. Implement Caching Strategies

Caching is a powerful technique for improving performance by storing frequently accessed data in a cache. There are several different types of caching you can use: Caching can speed up your tech or leave you behind.

• Browser Caching: Configure your web server to set appropriate cache headers so that browsers can cache your static assets.
• Server-Side Caching: Cache data on your server using tools like Redis or Memcached.
• Content Delivery Network (CDN) Caching: Use a CDN to cache your static assets on servers located around the world.

Here’s what nobody tells you: caching is great, but invalidation is hard. Make sure you have a strategy for invalidating your cache when the underlying data changes.

Let’s look at a concrete case study. A local Atlanta-based news organization, let’s call them “ATL News Now”, was struggling with the performance of their mobile web app. Their average page load time was over 5 seconds, which was causing a high bounce rate. We implemented a combination of image optimization, code splitting, and browser caching. We used TinyPNG to compress their images, Webpack to split their code, and configured their Apache web server to set appropriate cache headers. As a result, their average page load time decreased to under 2 seconds, and their bounce rate decreased by 30% within the first month.

Improving the end user experience of their mobile and web applications requires a combination of technical expertise, user empathy, and a willingness to experiment. By following these steps, you can identify areas for improvement, implement effective solutions, and create apps that your users will love.

Don’t just assume your users are happy. Start actively monitoring, testing, and optimizing your apps today. You’ll be surprised at the improvements you can achieve, and the positive impact it will have on your business. The end user experience of their mobile and web applications is the key to long-term success.