Moving to Castelldefels in 2026: 6 Essential Apps to Make Life in Spain Easier

Relocating to Spain is an exciting step, especially when your destination is Castelldefels, Gavà Mar, or the Barcelona coast. The lifestyle is exceptional: the sea, international schools, proximity to Barcelona, and a slower rhythm of life without losing access to the city.

However, moving to Spain also means dealing with administration, tax obligations, driving documents, social security, digital identification, and official notifications.

The good news is that many formalities can now be managed online or through official Spanish apps. For international residents, these tools can save time, reduce stress, and make the relocation process much easier.

Below are six essential apps and digital tools worth knowing before and after moving to Spain.

1. Agencia Tributaria

The Agencia Tributaria app is the official tool of the Spanish Tax Agency. It allows users to access tax information, receive notices, and manage certain tax-related procedures directly from a mobile device. The Tax Agency promotes the app as a way to carry out procedures conveniently and receive alerts.

This app can be useful if you need to:

• access your tax information,

• receive official tax notifications,

• manage tax-related appointments,

• check previous filings,

• or follow up on tax procedures.

For foreign residents and property owners, understanding Spanish tax obligations is essential, especially if you own property, rent it out, or become tax resident in Spain.

2. Mi DGT

miDGT is the official app of Spain’s traffic authority, the Dirección General de Tráfico. It gives drivers access to key information related to their driving licence and vehicles. The DGT also highlights the app on its official website and has continued expanding its services in recent years.

With miDGT, you can usually:

• access your digital driving licence in Spain,

• check vehicle information,

• review fines or traffic notifications,

• access driving-related procedures,

• and stay updated on traffic matters.

This is particularly useful for international residents who plan to drive in Spain or bring a vehicle into the country.

3. Mi Carpeta Ciudadana

Mi Carpeta Ciudadana is one of the most useful digital tools for anyone living in Spain. It acts as a personal digital folder where citizens and residents can consult information from different public administrations. The official website describes it as a tool to communicate with public administrations, check personal data, appointments, notifications, files and other official information.

It can help you:

• check official appointments,

• access personal administrative data,

• review notifications,

• follow certain public files or procedures,

• and keep track of interactions with Spanish authorities.

Access generally requires secure electronic identification through Cl@ve, electronic certificate, or similar systems.

For expats, this app can quickly become one of the most practical tools for staying organised.

4. Import@ss Seguridad Social

Import@ss is the digital portal of the Spanish Social Security system. It can be accessed through the Social Security website, Electronic Office, or the Social Security mobile app.

It is especially useful for people who work in Spain, are self-employed, employ domestic staff, or need to check their Social Security situation.

Through Import@ss, users can access information such as:

• personal and contact details,

• employment status,

• contribution history,

• contribution bases,

• and other Social Security-related data.

For anyone relocating to Spain for work or planning to become self-employed, this is an important tool to know.

5. Cl@ve

Cl@ve is Spain’s electronic identification system for public administration procedures. It allows users to identify themselves securely when accessing public services online. The official Cl@ve portal describes it as the common electronic identification system for relations with Spanish public administrations.

The Cl@ve app allows users to authenticate procedures through Cl@ve Móvil or receive a Cl@ve PIN in one place.

This is one of the most important tools for relocation because many official services in Spain require secure digital identification.

With Cl@ve, you can access services from:

• the Tax Agency,

• Social Security,

• DGT,

• regional administrations,

• and other public bodies.

For many newcomers, getting Cl@ve set up is one of the first digital steps toward a smoother life in Spain.

6. Seg-Social Seguridad Social

The Seguridad Social app gives mobile access to Social Security information and services. It can also provide access to Import@ss, allowing users to consult employment history, contribution bases, and other Social Security data.

This app may be useful if you need to:

• check your Social Security status,

• access reports,

• consult contribution information,

• update certain personal details,

• or manage employment-related administrative matters.

For employees, self-employed professionals, and families relocating to Spain, Social Security access is an important part of everyday administration.

How CASTAVA supports your relocation

At CASTAVA, we support international clients moving to Castelldefels, Gavà Mar, and the Barcelona coast with a complete, locally guided approach.

Our services include:

• property search,

• rental support,

• buying property in Spain,

• relocation assistance,

• and property management for owners living abroad.

We help make the transition smoother, more structured, and less overwhelming so you can focus on your new life in Spain.

Planning your move to Castelldefels or Gavà Mar?