# idonce — Human Verification

> Human Verification (iPhone/iPad app by Gradient Zero SoftwareentwicklungsgmbH.)

- Source: https://appshunter.io/ios/app/idonce/id6761532271 (this page in markdown: same URL + `.md`)
- Developer: [Gradient Zero SoftwareentwicklungsgmbH](https://appshunter.io/developer/1526658817)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 18 MB
- Languages: American English
- Released: 2026-04-09
- Data updated: 2026-06-05
- User reviews in markdown: https://appshunter.io/ios/app/idonce/id6761532271/reviews.md

## What is idonce?

idonce proves that a real human is actively present and approving an action — without revealing their identity.

HOW IT WORKS
1. A platform shows a QR code
2. You scan it with idonce
3. Confirm with Face ID or fingerprint — done

That's it. No puzzles, no accounts, no personal data shared.

WHAT IT PROVES
idonce generates a cryptographic proof that a real person on a genuine device has actively confirmed an action. This proof is issued as an eIDAS 2.0 compatible Verifiable Credential (SD-JWT-VC) — the same standard the EU uses for digital identity.

PRIVACY BY DESIGN
 • No name, no email, no phone number collected
 • No tracking, no cookies, no fingerprinting
 • Your identity is a pseudonymous device-bound key
 • Biometric data never leaves your device
 • You choose exactly which claims to share

SECURITY
 • Private key stored in Secure Enclave
 • Apple App Attest Integrity verification
 • Keys cannot be copied or exported
 • Biometric authentication required for every verification

BUILT ON OPEN STANDARDS
 • SD-JWT-VC (IETF) — Credential format with selective disclosure
 • OpenID4VP — Credential presentation protocol
 • OpenID4VCI — Credential issuance protocol
 • eIDAS 2.0 compatible — interoperable with EU digital identity wallets

USE CASES
 • Bot protection for communities and forums
 • Fake review prevention for e-commerce
 • Sybil resistance for voting and governance
 • Real-time transaction confirmation for fintech

idonce is not an identity system. It doesn't know your name. It answers exactly one question: "Did a real human on a genuine device just confirm?"

Open source. Zero external dependencies. Built in Germany.

--
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://www.idonce.com/privacy
Terms of Service: https://www.idonce.com/terms


## Version history (last 1 release)

### 1.0 — 2026-04-09

No release notes.

## More apps by Gradient Zero SoftwareentwicklungsgmbH

- [Dubai Swingers App](https://appshunter.io/ios/app/dubai-swingers-app/id6759797517)

All apps by Gradient Zero SoftwareentwicklungsgmbH: https://appshunter.io/developer/1526658817

---

*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 2026-06-05.*