A clear process. A strong partner.
Website Relaunch Agency
Platform change, version migration or complete relaunch? We take over with a system. We have packed all our experience into a structured roadmap and a compact relaunch checklist. So you know: you've come to the right place.
Free relaunch checklistWhat is important for a relaunch

Website Relaunch
A website relaunch at ACID21 means more than just a new design - we strategically realign your online presence and combine modern web design with technical excellence. We optimize your existing CMS infrastructure or assist you with the changeover to create a high-performance, target group-oriented and future-proof website.

Onlineshop Relaunch
An online store relaunch with ACID21 means making your store technically and strategically fit for the future - whether with Shopware, Shopify or Magento. We optimize performance, UX and interfaces to measurably increase visibility, conversion and growth. With our experience from numerous relaunch projects, we take your store to the next level.

App Relaunch
An app relaunch with ACID21 brings your application up to date in terms of technology and design - for Android and iOS. We improve performance, usability and design in a targeted manner to strengthen user loyalty and optimally position your brand in everyday mobile life - for more engagement, better ratings and long-term user loyalty.
Technologies & Systems Customized. Scalable. Future-proof.
At ACID21, we focus on your individual requirements - regardless of whether they involve special functionalities, complex interfaces or a customized design. We rely on a wide range of modern technologies to implement your wishes efficiently and sustainably. The result is a digital presence that is technically impressive and individually inspiring.
Successful relaunch projects
Globus Baumarkt
Relaunch of the Globus Baumarkt online shop incl. workshops, strategy and conversion consulting, migration from Shopware 5 to 6 as well as frontend and backend development.
Conversion Rate
Articles
deinSchrank.de
Website relaunch and optimization of the online shop by implementing a modular design system and product configurator for custom-made cabinets and shelves.
Conversion Rate
Article
Our relaunch process
A successful website relaunch requires structure, clear processes and an experienced team. As a specialized relaunch agency, we support you with a transparent, methodical process - from analysis to ongoing optimization. Our proven relaunch project plan ensures a smooth process and sustainable success.
In the concept phase, we analyze existing systems, define goals, target groups and functions. This results in a strategic roadmap for the relaunch - including technical architecture, UX concept and design draft.
Request a free auditAs soon as the concept is ready, we finalize the screen designs and prepare the backend and frontend architecture. This phase lays the visual and technical foundation for the development.
Now the implementation begins: Our developers program the defined functions, interfaces and layouts - clean, high-performance and responsive on all devices.
Parallel to development, we fill the new platform with content, carry out structured data imports and migrate product, customer and other relevant data.
Before the launch, we check all functions in detail - with a focus on usability, performance, security and SEO. After the successful go-live, the hypercare phase begins: we provide close support and react quickly to possible optimizations.
After the launch is before the launch: During ongoing operation, we ensure technical stability, regular updates and, if desired, continuously develop your platform further - in a data-based and targeted manner.






Why ACID21?
Because we are problem solvers by conviction.
As an experienced relaunch agency & experts in the field of e-commerce with more than 25 years of experience, we accompany you every day on the path from problems to customized solutions - and we do this successfully for numerous companies, several times a year.

25
Digital experts & years of digital know-how

1.000 +
realized projects

100%
Owner-managed
Frequently asked questions about shop relaunch
It always makes sense to relaunch a website, online store or app if the existing solution is technically outdated, no longer meets current design and usability standards or no longer optimally supports business objectives. Frequent triggers are falling conversion rates, slow loading times, poor mobile usability or new requirements from marketing, such as the introduction of new products or brands. Technological changes - such as new store or app platforms - or a change in user behavior can also make a relaunch necessary. If you want to be digitally successful today, you need to regularly check whether the existing solution meets user expectations - a strategically planned relaunch can be the decisive basis for future growth.
The costs depend heavily on the scope, the technical requirements and the individual goals of the project. A professional website relaunch with a specialized relaunch agency includes design and development as well as strategy, SEO and quality assurance - and usually starts at €30,000. The requirements for an online store relaunch are usually more complex - such as product data migration, interfaces to ERP systems or special checkout logics - which can quickly lead to mid-five-figure sums. App relaunches also vary greatly, depending on whether they are native apps for iOS and Android or hybrid applications. The costs here can range from €15,000 to €100,000. The important thing to remember is that a good relaunch is an investment in better user experiences, conversion rates and long-term growth - so a strategic and qualitative approach is worthwhile.
The duration of a relaunch project depends largely on the scope and complexity of the project. A classic website relaunch can be realized in 2 to 4 months, depending on the initial situation and objectives. Online store relaunches generally require more time, as issues such as product data maintenance, technical interfaces, payment and shipping processes and SEO migration also need to be taken into account - 4 to 6 months are realistic here. An app relaunch can be even more time-consuming, especially if new functions are developed or the architecture is fundamentally revised. Such projects often take between 4 and 8 months. Structured planning, close cooperation between all those involved and a realistic assessment of internal resources are crucial for the timetable.
A successful relaunch requires careful SEO planning in order to avoid loss of visibility. This includes, for example, redirects (301 redirects), structured data, loading time optimization and a clean site architecture. Our SEO experts will support your relaunch closely and sustainably.
A redesign usually only concerns the visual design, while a relaunch is a holistic reboot - including technical infrastructure, user guidance, content strategy and performance optimization. As a specialized relaunch agency, we think further than just "design new".
An online store relaunch brings with it specific challenges that go beyond a classic website project. The handling of existing product data, customer accounts and orders is particularly critical - these must be seamlessly transferred without any loss of data. Search engine optimization (SEO) also plays a central role: redirects (301 redirects) for existing URLs must be set up properly in order not to lose rankings and visibility. In addition, complex functions such as filters, shopping cart and checkout must be re-evaluated and optimized so that they function smoothly and the conversion rate does not suffer. Finally, the relaunch must be carried out without any lengthy downtime so that ongoing sales are not interrupted.
When relaunching an app, it is particularly important not to lose existing users and to tap into new potential at the same time. The focus is therefore on improved user experience (UX), performance optimization and the targeted integration of new functions that offer real added value. From a technical perspective, the relaunch must ensure that updates are distributed smoothly via app stores and that no data or user preferences are lost. App store optimization (ASO) must not be neglected either: A revised app icon, screenshots and a customized description can significantly increase visibility and downloads after the relaunch. A targeted rollout, ideally staggered, is also important in order to identify problems at an early stage and be able to react quickly.
When relaunching a website, online store or app, there are typical mistakes that can have serious consequences - especially for visibility, user satisfaction and conversion rates. One of the most common mistakes is the lack of a clear relaunch project plan with defined goals, responsibilities and milestones. Missing redirects of old URLs also often lead to ranking losses in search engines. Insufficient testing before the go-live, for example on mobile devices or under real load conditions, can cause technical problems after the launch. In addition, there is often a failure to obtain user feedback at an early stage and incorporate it into development. Avoiding these mistakes lays the foundation for a successful and sustainable relaunch.
The success of a relaunch is best measured by a combination of qualitative and quantitative key figures. Key KPIs include the development of traffic via search engines (SEO), the conversion rate, the time spent on the site or app and the bounce rate. For online stores, key sales figures, shopping cart abandonment and repeat purchase rates are also included. In the app sector, ratings in the app stores, download figures and user retention rates are relevant indicators. Technical monitoring - e.g. loading times, error messages or server availability - also provides information on whether the relaunch was technically successful. It is crucial to set clear target values before the relaunch and to check these regularly after the go-live.