What are the most important performance metrics to track when developing mobile apps with a framework?

2 Rendering Time

Rendering time is the amount of time it takes for your app to render the UI elements and content that the user interacts with. It is a measure of how smooth and fluid your app's animations, transitions, and interactions are, and how well your app adapts to different screen sizes and orientations. A high rendering time can cause your app to lag, stutter, or freeze, which can degrade the user's experience and satisfaction. A low rendering time can make your app look polished, professional, and responsive, which can increase the user's engagement and loyalty. Rendering time can be affected by the framework that you use to build your app, the quality and optimization of your code, and the performance of the device and platform that your app runs on.

3 Memory Usage

Memory usage is the amount of RAM that your app consumes while running. It is a measure of how efficiently your app manages the resources and data that it needs to function. A high memory usage can cause your app to crash, drain the battery, or slow down the device, which can annoy the user and make them uninstall the app. A low memory usage can make your app run smoothly, reliably, and efficiently, which can improve the user's experience and satisfaction. Memory usage can be influenced by the framework that you use to build your app, the amount and type of data that your app stores and processes, and the memory management techniques that you implement in your code.

4 Network Usage

Network usage is the amount of data that your app transfers over the network while running. It is a measure of how well your app handles the communication and synchronization of data between the device and the server or other devices. A high network usage can cause your app to consume more bandwidth, increase the loading and rendering time, or fail to load or update data, which can frustrate the user and make them lose interest in the app. A low network usage can make your app run faster, more reliably, and more cost-effectively, which can enhance the user's experience and satisfaction. Network usage can be affected by the framework that you use to build your app, the frequency and size of data requests and responses that your app makes, and the network optimization techniques that you apply in your code.

5 Battery Usage

Battery usage is the amount of power that your app drains from the device's battery while running. It is a measure of how well your app balances the performance and efficiency of your app. A high battery usage can cause your app to reduce the device's battery life, overheat the device, or trigger the device's power-saving mode, which can irritate the user and make them quit the app. A low battery usage can make your app run longer, cooler, and more sustainably, which can improve the user's experience and satisfaction. Battery usage can be influenced by the framework that you use to build your app, the intensity and duration of the tasks that your app performs, and the battery optimization techniques that you use in your code.

6 User Feedback

User feedback is the collection of ratings, reviews, comments, suggestions, and complaints that your app receives from the users. It is a measure of how well your app meets the user's expectations, needs, and preferences, and how satisfied and loyal they are with your app. A positive user feedback can indicate that your app is performing well, delivering value, and solving problems for the user, which can increase your app's popularity and reputation. A negative user feedback can indicate that your app is performing poorly, causing issues, or missing features for the user, which can decrease your app's downloads and retention. User feedback can help you identify the strengths and weaknesses of your app, and guide you to make improvements and updates based on the user's voice.

7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?