Operations | Monitoring | ITSM | DevOps | Cloud

When a mobile application takes too long to launch or becomes unresponsive, it can be difficult to find the cause. Datadog Real User Monitoring (RUM) helps developers detect these issues and understand which users are affected. But knowing that an application is slow doesn’t tell you which part of its code is responsible. Engineers often need to reproduce the problem locally, piecing together performance metrics and code execution information from separate tools.

Well-designed service level objectives (SLOs) help you track the benchmarks your app needs to meet to deliver a successful user experience (UX). To track performance against these SLOs, many SRE teams are turning to real user monitoring (RUM) and synthetic monitoring for their service level indicators (SLIs), as these forms of data provide more direct measurements of UX than backend performance metrics.

Frontend and mobile applications depend on technical steps that users expect to work in every user journey: loading search results, signing in, saving a payment method, or processing a payment. Datadog Real User Monitoring (RUM) captures detailed events about these interactions, including views, actions, resources, and errors. But examining those events individually does not always provide a direct answer to more fundamental questions: Did a critical application step work, and how long did it take?

Why do tickets about a slow application keep arriving while every server, link and service check reports normal? That mismatch is the problem end user experience monitoring exists to solve. A healthy server is one thing, but the business notices something else: whether people can finish their work or complete a purchase without delays or errors. Monitoring in most IT operations groups was built to watch the systems from the inside, so it reports CPU load, memory and uptime.

Why does a page that scores well in testing still draw complaints from customers about slowness? A lab test runs on one fast machine over a stable connection. Customers use older phones, congested mobile networks and browsers loaded with extensions, so their experience can only be measured on their own devices. Real user monitoring captures that experience, and it produces a long list of measurements.

Many revenue-critical interactions, such as ecommerce checkouts and customer portals, run on Shopify and Salesforce. But engineering teams have less control over the frontend runtime on these platforms, and this lack of control can make user monitoring difficult to implement and maintain. These monitoring limitations can leave gaps in visibility across important parts of the user journey.

Datadog Real User Monitoring (RUM) SDK settings live in your application code, so changing how the SDK collects RUM data has traditionally required shipping a new application version. These configuration changes can include adjusting sampling rates, enabling Session Replay, or changing which events the SDK collects. For mobile teams, this means that updates often sit in app store review for days or weeks before users start adopting the new version. Full user adoption can take weeks or months longer.

Most IT teams learn their application feels slow when a customer complains. Server metrics never measure what a person on a phone waits for. The best real user monitoring tools close that gap by collecting timings from your users' browsers. Choosing one got harder this year, because the measurement standard moved. In this blog, we compare the best tools for real user monitoring, including their pros, cons, and key features. By the end you will know which one fits your stack.

In the hospitality industry, every second counts—especially when it comes to online bookings. Recently, I’ve been working with a hospitality customer who relies on eG Innovations SaaS to monitor the performance of their booking website. Like many modern sites, theirs is powered by numerous plugins and external third‑party services, each playing a crucial role in delivering a smooth booking experience while also introducing potential points of delay.

As.NET Multi-platform App UI (MAUI) becomes the default cross-platform UI framework in the Microsoft ecosystem, many teams are standardizing on it to build mobile applications for iOS and Android. However, observability has not kept pace with the shift in adoption. Developers often rely on unsupported community bindings or maintain their own wrappers around native iOS and Android SDKs, which introduces instability and ongoing maintenance.