Comparison

Calliope mini vs Die Klima App

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calliope mini

This app allows users to program a micro-controller to build robots, transmit messages, and make things move. It features LEDs, buttons, sensors, and Bluetooth for creative coding projects.

Highlights
  • Program micro-controller
  • Build robots
  • Transmit messages
  • Control LEDs
  • Use motion sensor
  • Bluetooth communication
Features
Read full description

With Calliope mini you have countless creative options right at your fingertips. You want to build a robot or transmit messages? With just a few clicks you can create a program for the controller and make things move. Besides 25 red plus three RGB-LEDs and two programmable buttons the board contains a combined position sensor with motion sensor and compass as well as a bluetooth module that allows the Calliope mini to communicate with other devices.

About

Die Klima App

Experience climate change impacts through immersive augmented reality modules. Learn about flood disasters, ocean pollution, forest fires, and personal stories of those affected by a changing climate. Includes interactive games and factual information.

Highlights
  • Augmented reality flood disaster simulation
  • Interactive 'Save the Sea' plastic cleanup game
  • Virtual forest fire experience
  • Personal stories of climate change impact
  • Offline functionality
  • Lesson plans for educators
Read full description

WHAT IT’S ALL ABOUT Following on the highly successful WDR augmented reality app covering history from 1933–1945, which was downloaded 1.5 million times, the German broadcaster is releasing its “Die Klima App” (The Climate App). Digital education will never be the same. Use a tablet or smartphone and learn in a thrilling and hard-hitting new way. The app offers a choice of four different modules: - Receive a virtual classroom visit from survivors of the flood disaster in Germany’s Ahr Valley. As they stand face to face with you, they’ll describe how they were trapped by the rising waters and feared for their lives. The augmented reality technology lets you experience the deluge and destruction for yourself. - When you play the Save the Sea game, your classroom turns into an ocean, with plastic waste floating in it. You dive through a portal into the water and use a gripper to fish out the rubbish and earn points. At the end, you’re awarded a medal. There are also bonus bottles with animated information. - Step into a virtual environment and experience the devastating regional forest fire in Gummersbach, Germany, as well as the dangers faced by residents and volunteers during the rescue operations. One firefighter recounts what it was like being up close to the blaze. - Four young people join you virtually in the classroom to talk about the different ways in which climate change has impacted them. Anna is a farmer from Overath whose cows suffer from the heat. In Dinslaken, Aaron is cultivating a forest. Tina lives in Kuckum, a village affected by lignite mining. A Fridays for Future activist, Leonie talks about flooding in Uganda. On top of that, there are facts and additional information (i) on the various topics. We would love to read your feedback and review. Contact us: ar@wdr.de THE APP IN THE CLASSROOM Teachers can access the dedicated lesson plans on various subjects as well as worksheets in the app menu (available only in German). Designed for students aged 13 to 16 years and suitable for inclusive learning groups, the climate app modules lend themselves to varied, interdisciplinary use. FEATURES o By downloading the WDR “Die Klima App”, you can use it offline without worrying about the quality of your network connection. o The app is easy to use and inclusive. o Different people and life stories play an important role. o Climate change is brought to life through interdisciplinary topics. The use of animations in the many factual, informative videos keeps things exciting. o The WDR “Die Klima App” is free of charge. WHAT AUGMENTED REALITY MEANS Augmented reality (AR for short) is a technology that blends the real world with virtual elements, allowing you to place virtual, three-dimensional animations and people in real rooms. This means you can go on a voyage of discovery, exploring and moving around in the virtual environment. Virtual visitors who appear in real-world rooms will tell you their stories. These are short – 1:30 to four minutes – but very intense and very moving.

Screenshots

Calliope mini4 screens
Die Klima App4 screens

Verdict

The call

The clearest difference is update cadence: Die Klima App at every 4 days against Calliope mini's every 3 months. Die Klima App also leads on review sentiment (40% vs 26%) and iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Calliope mini ships an update every 3 months, Die Klima App every 4 days. The most recent releases landed on October 20, 2026 and October 22, 2026 respectively.

Scorecard3 real differences · 7 level
Calliope mini versus Die Klima App: the parameters behind the verdict, then further details
ParameterCalliope miniDie Klima App
PriceFreeFree
Rating—1.0 (1 ratings) — better
Positive reviews25.6% of reviews40.4% of reviews — better
Number of ratings—1 — better
Update frequencyEvery 3 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size37 MB1.7 GB
Age rating4+4+
DeveloperCalliope gGmbHWDR

Customer experience

Calliope mini

Written reviews39 reviews
Positive25.6%
Neutral12.8%
Negative61.5%

Die Klima App

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews52 reviews
Positive40.4%
Neutral0.0%
Negative59.6%

In-app purchases

None

Calliope mini

No in-app purchases

None

Die Klima App

No in-app purchases

Questions

Is Calliope mini free?
Calliope mini is free to download, with no in-app purchases.
Is Die Klima App free?
Die Klima App is free to download, with no in-app purchases.
Do Calliope mini or Die Klima App have ads?
Neither Calliope mini nor Die Klima App shows ads.
Which is updated more often, Calliope mini or Die Klima App?
Calliope mini ships an update every 3 months, and Die Klima App every 4 days. Most recently, Calliope mini was updated on October 20, 2026 and Die Klima App on October 22, 2026.

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