Chargy Transparency Software

GraphDefined GmbH

About this app

This app lets you validate the transparency and integrity of your EV charging sessions.

Under the German Calibration Law (Eichrecht) — and within the upcoming EV Quality Infrastructure (EVQI) initiative supported by NLnet — all legally relevant charging data is cryptographically secured.

This ensures that meter values, tariffs, timestamps, and session metadata cannot be altered unnoticed.

The app acts as an independent verification tool:
- It validates cryptographic signatures attached to charging records
- It checks data integrity and authenticity end-to-end
- It enables third-party, vendor-neutral verification of charging sessions

This makes charging processes auditable, transparent, and trustworthy — for EV drivers, operators, auditors, and regulators alike.

No proprietary cloud required.
No vendor lock-in.
Just verifiable facts.

What’s new

Fixes problems with the AppIcon.