The climate is
changing - are you
changing too?

The climate is
changing - are you
changing too?

How does our app work


The energy consumption of our digital lives contributes significantly to climate change. CO₂free is the first app* that actively improves your carbon footprint by making your cell phone, and soon your entire digital lifestyle, nearly climate neutral.

How do we help save the climate?

Our process


Our app scans the files, photos and videos on your smartphone and shows you at a glance how much greenhouse gas they cause


A lot of data on your smartphone is outdated or obsolete - for example, because the perfect selfie often doesn't succeed on the first try. Our app suggests such photos and videos; you can delete them with just one swipe.


With the app, you can ask us to decommission CO₂ certificates to offset your remaining footprint. You also get a climate protection plus, because the app eats less energy than we compensate for each download.

Why CO₂free?

Nothing threatens our planet and our humanity as much as climate change - this is scientifically well studied and proven. Some of the effects are already clearly visible today: weather extremes such as severe storms and droughts, melting polar ice caps and floods endanger the lives of many people and can lead to famine, epidemics and refugee movements.

With the Paris Climate Agreement of December 2015, almost 190 countries agreed on strategies to significantly reduce CO₂ emissions. In the long term, the aim is to limit the rise in average global temperature to well below 2°C compared with pre-industrial levels.

The majority of scientists and climate researchers agree that we ourselves are responsible for the fact that the earth continues to warm up. Since the Industrial Revolution in the 18th century, mankind has increasingly contributed to feeding CO₂ and other heat-trapping gases into the atmosphere. The result: the so-called greenhouse effect, which ensures that less and less sunlight is reflected back out from the earth. This causes the average temperature in the world to rise.

There are numerous ways in which alliances of states and governments are currently trying to halt or at least slow down climate change. For example, the European Union (EU) has decided to reduce its greenhouse gas emissions by at least 40% by 2030 compared to 1990. This is to be achieved, among other things, through the expansion of sustainable energy sources, the strengthening of low-carbon transport and emissions trading that limits the emission of greenhouse gases from industry.

But some companies are also taking extensive measures to combat climate change. For example, some organizations already have rules in place to forego a business flight if in doubt, to produce more energy-efficiently, and to rely more on climate-friendly processes overall in their own supply chain.

And private individuals? They can do something too! Every time you take your bike and leave your car behind, prefer regional and seasonal products when shopping, and use energy-saving lighting, you make a small contribution to climate protection. And the more people do this and carry this attitude into the companies or organizations in which they work, the greater this positive effect will be.

The car trip to the supermarket, the weekend flight to the vacation island, the cruise in the Caribbean - in many areas there is now a much greater awareness that our personal actions leave a smaller or larger CO₂ footprint. Terms like "flight shame" remind us that we ourselves can influence what our impact on the climate looks like.

Less well known: Our digital lifestyle also causes greenhouse gas emissions - and not in short supply: Data stored today on servers and in clouds requires enormous amounts of energy. Facebook alone, for example, emits as much CO₂ as 30,000 citizens in the European Union combined. By 2025, the amount of data generated each year could rise to 175 zettabytes, contributing significantly to the increase in CO₂ emissions in the ICT* sector. By 2040, emissions from this sector could account for 14% of total global emissions.

Too big numbers? Too abstract? Then let's make it concrete here: The global CO₂ footprint of the Internet, for example, is comparable to that of air travel and, at one billion metric tons, is responsible for around 2% of global annual emissions. But it already starts on a small scale, with each and every one of us: If you store 100 cell phone photos in your cloud for a year, you produce just as much CO₂ as traveling 11.5 kilometers by train, while backing up a one-hour video in the cloud emits about as much as a long-distance bus trip between 80-100 kilometers.

*ICT = information - and communications technology
Sources: Information Service of the German Economy (2019); European Commission (2020); Federal Environment Agency (2018, 2020)

How can you get to grips with this problem without renouncing all digital technology? By first analyzing how much CO₂ your smartphone actually causes - and then trying to reduce this figure.

This is exactly where CO₂free comes in: The app determines the ecological footprint of cell phones and gives users the option of deleting superfluous data directly. This reduces the energy consumption of the device as well as that of the cloud services and data centers, thus reducing the burden on the environment. The remaining CO₂ emissions from additional data on the cell phone can be offset directly via CO₂free.

But even independent of CO₂free, users literally have it in their own hands to reduce the impact of their smartphone on the environment: for example, by avoiding unnecessary services, superfluous e-mails, and redundant search queries, and by using social media more consciously.

This is how

our CO₂free App works

The energy consumption of our digital lives contributes significantly to climate change. CO₂free is the first app* that actively improves your carbon footprint by making your cell phone, and soon your entire digital lifestyle, nearly climate neutral.

How does it work? Our app* detects unnecessary data on your smartphone and allows you to delete these photos and videos with just one swipe. This reduces the energy these files consume in the cloud and reduces CO₂ emissions.

But the app* offers you another tool for even more climate protection...

CO₂free compensates for your digital footprint by setting aside CO₂ certificates - in three ways:

● CO₂free offsets one kilogram of CO₂ with every download of the app*.

● You can ask CO₂free to offset your CO₂ footprint left after deleting data.

● For deleting data you will receive vouchers from our climate alliance partners, who will decommission further certificates for you.

Our partners

Our supporters