App-Entwicklung: Web App Performance
A slow web app loses users before it even loads. Core Web Vitals affect search rankings, user retention, and conversion. We systematically analyse your web app's performance, identify the bottlenecks with the greatest impact, and optimise deliberately – delivering measurable improvements in LCP, CLS, and INP.
Challenges you'll recognise
- Your web app takes several seconds to become interactive on mobile devices – you lose users before the app has loaded.
- Your Lighthouse score is mediocre and you do not know which optimisations would actually have the biggest impact.
- Layout shifts during loading frustrate users and cause unintended taps on the wrong element.
Core Web Vitals
LCP (Largest Contentful Paint), CLS (Cumulative Layout Shift), and INP (Interaction to Next Paint) are Google's central web performance metrics. We measure them on real devices and in real network conditions – not just in a Lighthouse report under lab conditions – and optimise based on actual user data.
Bundle Optimisation
Oversized JavaScript bundles are the most common cause of slow web apps. We analyse bundle sizes, identify unnecessary dependencies, implement code splitting and lazy loading, and ensure only the code actually required for the current screen is loaded.
Rendering Strategies
Server-side rendering, static site generation, or client-side rendering – the rendering strategy directly impacts LCP and time-to-interactive. We select or recommend the appropriate strategy per content type and requirement, and combine strategies for optimal results.
Asset Optimisation
Images, fonts, and static assets are often unoptimised and slow the initial load considerably. Modern image formats, lazy loading, optimal caching, and font loading strategies that prevent layout shift – we optimise the entire asset stack.
Good to know
Measure Before Optimising
Without profiling on real devices in real network conditions, performance optimisation is guesswork. We begin every optimisation with structured measurement – and prioritise based on data, not assumptions.
Core Web Vitals as Target
LCP under 2.5 seconds, CLS under 0.1, and INP under 200ms are Google's thresholds for 'Good'. We optimise toward these values – not just a good Lighthouse score under lab conditions.
Code Splitting as Standard
Modern web app development requires code splitting: only the code needed for the current screen is loaded initially. This reduces time-to-interactive significantly – especially on mobile devices with weaker CPUs.
Frequently asked questions
What is the difference between a Lighthouse score and real Core Web Vitals?
How much performance improvement is realistic?
Do Core Web Vitals affect search ranking?
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Success you can measure
With us you're always one step ahead technologically and tap directly into our extensive app development expertise. We take a close look at your app idea, identify key success factors and create tailor-made applications. Your visions and goals are at the heart of our joint project work.
Expert knowledge in app technologies
React Native, Flutter, native iOS and Android — we pick the stack to fit your project, not our preference.
Comprehensive user experience know-how
Intuitive operation and seamless interactions decide ratings and how long users stay in the app.
Proven track record
Published apps in the App Store and Play Store — from MVP to mature platform.
Versatile team
Concept, design, development and backend from one hand — no friction at the interfaces.
Long-term partnerships
We stay after launch and keep evolving your app with maintenance and updates.
READY FOR YOUR APP THAT SETS NEW STANDARDS?
Whether you want to optimize an existing app or bring a new vision to life – we'd love to meet you. A no-obligation conversation is always a great start.
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