Casira
Your smart Energiy Assistant
Free · In‑App Purchases
Casira finally makes your energy costs easy to understand. Enter your meter readings for electricity, gas, water and heating oil, and Casira shows you exactly where your money goes.
At the heart of it sits the instalment radar. Casira projects your real usage forward and tells you whether a back-payment is coming or a credit is waiting, and it suggests a monthly instalment that fits. No nasty surprises when the annual bill arrives.
What Casira does for you:
Usage and costs for electricity, gas, water and heating oil in one place. A forecast for the annual bill, with back-payment or credit. A tariff check against your real usage, so you can see whether switching pays off. An AI energy advisor that runs right on your device and explains your numbers. Photo proof for every reading, taken straight with the camera. Clear analyses, trends and a CO2 overview. Sync through your private iCloud between iPhone and Mac.
Your data stays with you. Casira keeps what you enter on your device and in your private iCloud, not on someone else's servers.
Casira is free to download, and for the first 21 days every Plus feature is unlocked. No account, no payment details, it expires on its own. After that you decide: Casira Plus as a monthly or yearly subscription, or you carry on for free. Meters, readings, costs and tariffs stay free for good.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Polish after launch:
- Amounts now use the currency of your region instead of always showing euro
- Numbers no longer break between the figure and the currency symbol
- The yearly balance moved into the sidebar ring
- The tariff page scrolls instead of jumping
- The analysis only cites sources that actually exist
- Now runs on iOS 26.0 instead of 26.5
The developer, Carsten Ratzlaff, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Carsten Ratzlaff
- Size
- 12 MB
- Category
- Finance
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
English and 2 more
- English, German, Polish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Casira Plus (Month) $3.99
- Casira Plus (Year) $12.99
- Copyright
- © 2026 Ratzlaff CX & AI Advisory
