TrustDoc vs LockSign
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
TrustDoc
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Fake or false trade and transport documents feature in the majority of modern financial frauds and are the greatest menace facing the international trading community. Financial institutions, traders, insurance companies, shipping agents and other intermediaries all rely on transport documents such as Bills of Lading, Seaway Bills, Airway Bills, Sales Contracts, Invoice, Certificate, CMR and FCR when making decisions. A document that appears genuine can induce a bank to pay for goods or finance a trade. It can prompt an insurance company to grant cover on a ship or shipment, import license, or indemnify a fraudulent claimant. It may lead a shipping agent to release a cargo to someone that is not entitled to it. It is important to remember that any document can be forged. In the trade and financial industry, fake documents mostly copy the style of a legitimate trader and it can be difficult for a non-experienced eye to spot the difference. TrustDoc allow any person to authenticate a document anytime, anywhere at almost instantly, Free of charge.
LockSign
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Securely and safely sign, initial, date, and timestamp documents, PDFs, files, photos β even items scanned with your camera. LockSign creates a verifiable electronic signature that is unique to each document, signature, and signing. HOW LOCKSIGN WORKS We combine info into a QR code thatβs part of each electronic signature. This means the final signature is different for each signing and canβt be copied or forged. Each signing starts with an original signature, thus beginning our algorithmic encryption process. IS LOCKSIGN SAFE Our signature verification system recognizes any invalid signatures or document mismatches. All the info that creates a LockSign signature is encrypted. WHAT KINDS OF FORMATS CAN I SIGN? All document types are supported: PDFs, docs, spreadsheets, photos, files, camera scans β you name it. All documents are converted to PDF during the signing process. DO RECIPIENTS NEED A LOCKSIGN ACCOUNT? No. You can send documents to anyone. DOES LOCKSIGN STORE MY DOCUMENTS? Documents are only briefly stored during the process of verifying LockSign signatures. DOES LOCKSIGN HAVE ACCESS TO MY DOCUMENTS? No. We donβt have access to documents submitted or sent via our platform. DOES LOCKSIGN HAVE ACCESS TO MY BIOMETRIC INFORMATION? No. The platform uses biometric info via your smart device. Terms & conditions: https://www.locksign.com/terms-and-conditions
Screenshots
Verdict
The clearest difference is in-app purchases: TrustDoc at none against LockSign's 2. TrustDoc also leads on iOS requirement (13.1 vs 17.4). On price, update cadence, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. LockSign sells 2 in-app purchases, starting at $5.99 per month. TrustDoc asks for nothing beyond the download.
TrustDoc ships an update every 2 weeks, LockSign fortnightly. The most recent releases landed on October 7, 2026 and October 13, 2026 respectively.
| Parameter | TrustDoc | LockSign |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks β better | Fortnightly |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.1 β better | 17.4 |
| Further details β not scored | ||
| Size | 31 MB | 72 MB |
| Age rating | 4+ | 4+ |
| Developer | NFC Touch Limited | LockSign LLC |
In-app purchases
TrustDoc
No in-app purchases
LockSign
- Standard$5.991 Month
- Premium$9.991 Month







