About this app
SignAuth SignAuth uses advanced AI technology to identify autographs and assess their authenticity in seconds. Simply snap a photo of any signature and receive a comprehensive authentication report with market insights. Features Instant Autograph Identification Upload one clear photo and our AI expert system identifies who signed it based on signature characteristics and known exemplars. Authentication Analysis Get detailed authenticity assessments including signature characteristics, ink analysis, writing pressure, and red flags to watch for. Market Valuations Receive estimated market value ranges based on comparable authenticated examples from auction records. Collection Vault Build and manage your autograph collection with full analysis reports saved for every signature you scan. Rarity and Collectability Scores Understand how rare each autograph is and current collector demand in the market. Comparable Examples View similar authenticated autographs and auction references to validate your findings. SignAuth Pro Unlock unlimited scans and full analysis reports with SignAuth Pro. Weekly: 4.99 per week with 3-day free trial Annual: 39.99 per year with 7-day free trial - Best Value Lifetime: 99.99 one-time purchase Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. Manage subscriptions in your device Settings. About SignAuth provides AI-powered authentication analysis for educational and informational purposes only. This is not a professional authentication service or investment advice. Always seek professional authentication for valuable autographs. Privacy Policy: https://angelapplications.co.uk/privacy-policy/ Terms of Use: https://angelapplications.co.uk/terms-of-use/
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 6, 2026 · 8:50 PM Free