# A-Trust Signatur > Secure digital signature and authentication app for legal European document signing. (iPhone/iPad app by A-Trust GmbH.) - Source: https://appshunter.io/ios/app/a-trust-signatur/id1016945247 (this page in markdown: same URL + `.md`) - Developer: [A-Trust GmbH](https://appshunter.io/developer/460404403) - Category: Business, Utilities - Price: Free - Rating: 4.72/5 from 401 App Store ratings - Age rating: 4+ - Requires: iOS 13.0 · 8 MB - Languages: English, German - Released: 2016-02-16 - Data updated: 2026-08-04 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/a-trust-signatur/id1016945247/reviews.md ## What is A? Mit der A-Trust Signatur App des führenden österreichischen Vertrauensdiensteanbieters können Sie noch einfacher digital und dank eIDAS-Konformität europaweit rechtssicher unterschreiben. Die App ermöglicht eine schnelle Zwei-Faktor-Authentifizierung mittels Geräte-PIN, Touch ID oder Face ID. Sie kann in Verbindung mit einer aktiven Handy-Signatur, ID Austria oder xIDENTITY (EU-Identity Mobile) genutzt werden, welche Sie bei einer Registrierungsstelle beantragen können. Durch Verwendung von zertifikatsbasierten Authentifizierungsprozessen im Hochsicherheitsrechenzentrum von A-Trust wird dabei höchste Sicherheit in der digitalen Welt gewährleistet. Weitere Informationen finden Sie auf der Website von A-Trust unter www.a-trust.at. ## Key features - Digital document signing - Cross-border legal compliance (eIDAS) - Two-factor authentication - Device PIN, Touch ID, Face ID support - Compatible with Handy-Signatur, ID Austria, xIDENTITY ## Frequently asked questions about A ### What does the A-Trust Signatur app do? The A-Trust Signatur app allows you to sign documents digitally and legally across Europe. It leverages secure two-factor authentication methods and is compliant with eIDAS regulations, ensuring your digital signatures are recognized throughout the EU. ### What are the key features of this app? Key features include secure digital signing, eIDAS compliance for pan-European legal validity, and fast two-factor authentication using your device's PIN, Touch ID, or Face ID. It also integrates with Austrian digital identity solutions like Handy-Signatur and ID Austria. ### Is this app free to use? Based on the provided information, the app itself is free to download and use. However, you will need an active Handy-Signatur, ID Austria, or xIDENTITY, which may have their own registration or associated costs from a registration authority. ### What digital identity solutions is this app compatible with? The app is compatible with various Austrian digital identity solutions, including Handy-Signatur, ID Austria, and xIDENTITY (EU-Identity Mobile). You can obtain these digital identities from an authorized registration office. ### How does the app ensure security? The app ensures high security through certificate-based authentication processes conducted within A-Trust's high-security data center. This guarantees the integrity and authenticity of your digital signatures in the digital world. ## Version history (last 5 releases) ### 5.2.4 — 2026-04-20 Improved performance and code maintainability with no functional changes. ### 5.1.12 — 2026-03-23 Ecostats 2025. ### 5.1.11 — 2025-03-17 Aktualisierung der EcoStats für 2024 ### 5.1.9 — 2024-03-26 Fehlerbehebung bei der Anzeige der TAN-Liste ### 5.1.4 — 2024-01-25 Neue Funktion: ÖkoStats --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-04.*