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How does a successful climate protection app for cities and municipalities work.

Climate Token EN

Gamification for more livable cities.

Changers is a specialist in digital gamification in the fields of health promotion and climate protection. With our Klima-Taler application for cities, we ensure greater citizen participation in municipal climate protection. 17 cities in Germany are active in the Klima-Taler network, as well as other municipalities in Portugal and Finland.

The Klima-Taler App engages citizens in municipal climate protection. Klima-Talers are collected for CO2 savings and can be exchanged for benefits in local shops and city facilities. This digitizes municipal climate protection, promotes the local economy, and makes your city even more livable – with less car traffic and more citizen participation.

Here’s how you can access the Klima-Taler App.

Join the Klima-Taler App, used by many cities together. It offers everything you need to inspire your citizens for climate protection from the start, starting at 2,400 Euros annual fee, including our communication package.

Use the white label version of the aforementioned Klima-Taler App, and we will tailor the Klima-Taler App specifically for your city. Your Klima-Taler App will then appear with its name and app icon in the Apple App Store and Google Play Store. Cities like Vienna, Aachen, or Lisbon use the white label version.

If you already have an app for your city, the white label Klima-Taler App can also be integrated into your existing app using the piggyback principle as a Software Development Kit, or SDK. The advantage: You keep your existing community, which can now continue to grow. Cities like Darmstadt or Hamm use the piggyback option.

First and foremost, data protection.

Climate Token privacy EN

The app can basically be used without specifying a name, email address, or phone number. If participants delete the app, we also have no way to restore the data. If desired, users can create a profile. This requires a name, an email address, and a password. We host and process the data in Germany in compliance with GDPR. Our business model is based on the participation fees of the municipalities. Participation by local retailers in the municipalities is always free.

What can the Klima-Taler App achieve in your city?

Klima-Taler Dashboard

The Klima-Taler App ensures greater citizen participation in municipal climate protection. In a playful, positive, and cheerful way, we encourage more movement and fewer greenhouse gases. Our City App motivates users to walk more, cycle more often, or use buses and trains. The app measures distances, calculates CO2 balances, and rewards CO2 savings and civic engagement with Klima-Talers. The climate currency of your city can be exchanged on the app marketplace for vouchers, tree planting, and participation in raffles. This playfully combines municipal climate protection and economic promotion.

The colorful heart of our software, the Klima-Taler, is based on a 5 kg CO2 saving.

How Klima-Talers are made.

Climate Token Creation EN

Based on GPS data and motion sensors, distances and types of mobility are automatically detected, and CO2 savings are calculated. When 5 kilograms of CO2 savings are achieved, the Klima-Taler is credited to the user’s account. Participants can easily produce their own Klima-Talers.

Earning Klima-Talers for climate protection measures.

Climate Token climate protection Measures EN

With our “Save the planet” widget, you can set an infinite number of self-chosen measures and activities with which users can collect Klima-Talers. Or you can draw from the pool of environmental and climate protection measures already stored by Changers. Activities can include switching to renewable energies, avoiding packaging waste, or consciously buying local and seasonal products. Perhaps you also want to reward civic engagement, such as neighborhood help, club activities, or voluntary work in your city with Klima-Talers.

Gamification is the key to success.

In the app, we playfully motivate through rewards. Those who invite friends or achieve CO2 savings goals are rewarded with Klima-Talers. This is motivating and ensures high citizen participation. Playful competitions are fun and motivating. Seeing the jointly planted forest grow gives a good feeling. However, the central motivational element is collecting and exchanging the Klima-Talers. Klima-Taler participants walk 4.5 times more, cycle twice as much, and reduce car trips by a good third. More on gamification HERE.

Monthly CO2 team competitions.

Cities, districts, clubs, and companies can compete in monthly competitions for the most saved CO2. Push notifications provide daily updates.

Climate Token challenges EN

Running and cycling achievements are linked to tree planting. Users must cover 200 kilometers on foot and by bike in 21 days. Once the goal is achieved, a tree is unlocked, which is planted in a climate protection project. If the distance is not reached within the specified time, the values achieved so far expire, and the challenge starts anew.

Exchange of Klima-Talers.

Klima-Taler Marktplatz

Klima-Talers can be exchanged for discounts at hundreds of climate partners.

Also, allow your local merchants to benefit from the Klima-Taler network. The local retail sector can use the app to highlight its offers and sustainably attract new customers while retaining the existing ones for the long term. Access to the merchant portal is free of charge for city merchants. Registration is done via the “Create offer” button in the navigation bar on

In tutorial videos, we show how easy it is to set up an account and post an offer. All tutorials can be found on our FAQ page for providers.

Climate Token Marketplace EN

Check out this video to see how easy it is to exchange Klima-Talers. Example from the city of Hamm. (Sorry it is only in German language)

Climate Token Marketplace EN

The communication package for your participation.

For a successful start in the Klima-Taler program, good communication is essential. We have prepared a complete marketing package that includes everything from outdoor advertising to a digital data dashboard for your website.

Climate Token Marketing EN

The professional communication package saves valuable time and doesn’t cost a cent more than the annual Klima-Taler participation fee, which starts at 2,400 Euros per year, depending on the size of the municipality.

Here you will find an overview of all communication materials included in the booking of the jointly used Klima-Taler app.

We look forward to hearing from you.

You can reach us anytime at On, you will find many more examples and information.

How do we help you promote the Changers City app?

The success of your City App grows with the number of participants. We support you in your advertising campaign for your app with a complete marketing package. You will receive:

  • an iFrame banner for integration into partner websites. 
  • The app feature “Friends invite friends”. Because up to one third of users join because of a friends recommendation. 
  • Communication materials for contacting Climate Partners.
  • The first 50 nationwide Climate Partners.
  • Info poster templates for partner Point of Sale communication.

In addition, you can also book your own landing page for user and partner acquisition.

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