Best Digital Certificate Validator App

0+ iOS apps curated and reviewed

4.5 avg rating
20 free apps
Updated July 2026

If you already know Signeasy, this is the deeper bench. 0+ digital certificate validator app for iPhone, all reviewed and ranked by user rating, recency, and download trend as of July 2026.

Compare top Digital Certificate Validator App (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Signeasy: Sign PDF DocumentsSigneasy: Sign PDF DocumentsFree4.9★ (34K)NoYesAug 2026
2SignNow: e-Signature appSignNow: e-Signature appFree4.5★ (18K)NoYesAug 2026
3Docusign - Upload & Sign DocsDocusign - Upload & Sign DocsFree4.9★ (822K)NoYesAug 2026
4Authenticator App†Authenticator App†Free4.5★ (2.5K)NoYesAug 2026
5Signature-AppSignature-AppFree4.6★ (2.6K)NoYesAug 2026
6Authenticator App ™Authenticator App ™Free4.4★ (24K)NoYesAug 2026
7Authenticator ℠ AppAuthenticator ℠ AppFree4.3★ (4.7K)YesYesAug 2026
8Genius Sign: PDF doc signatureGenius Sign: PDF doc signatureFree4.9★ (12K)NoYesAug 2026

Top Picks for Digital Certificate Validator App

Signeasy: Sign PDF Documents#1

Signeasy: Sign PDF Documents by Glykka LLC

Signature Maker & Creator App
Editor's Choice
📊 Productivity
4.9😊(34K ratings)
FreeIn-App Purchases
Signeasy: Sign PDF Documents screenshot 1
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Signeasy: Sign PDF Documents screenshot 3
Signeasy: Sign PDF Documents screenshot 4
Signeasy: Sign PDF Documents screenshot 5
Signeasy: Sign PDF Documents screenshot 6

Easily sign and send documents for electronic signatures from your mobile devices. All signatures are legally binding and include a digital audit trail for security and compliance. Works across multiple platforms and integrates with cloud storage.

What We Love

  • ⭐ Excellent app
  • 🚀 Easy and convenient to use
  • 👍 Intuitive and user-friendly
  • 🔒 Secure and trustworthy

Room to Improve

  • 💰 Expensive subscription model
  • 🔒 Restrictive for non-subscribers
  • 🐛 Occasional bugs and glitches
SignNow: e-Signature app#2

SignNow: e-Signature app by airSlate, Inc.

Sign documents & PDF forms
Strong Contender
📊 Productivity
4.5😐(18K ratings)
FreeIn-App Purchases
#66in Productivity
SignNow: e-Signature app screenshot 1
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SignNow: e-Signature app screenshot 5
SignNow: e-Signature app screenshot 6

Easily sign and manage PDF documents and other file formats with this comprehensive e-signature solution. Upload files, create templates, and collect legally-binding signatures from multiple parties. Securely store and access your documents online or offline.

What We Love

  • 🚀 Efficient and legitimate
  • 🚀 Easy to use and convenient
  • 🚀 Smooth and simple
  • 🚀 Awesome and great app

Room to Improve

  • 🐛 Buggy and glitchy
  • 💰 Expensive subscription
  • 🔑 Difficult to cancel/unsubscribe
Docusign - Upload & Sign Docs#3

Docusign - Upload & Sign Docs by Docusign

Sign PDFs & Contracts
Worth Considering
📊 Productivity
4.9😊(822K ratings)
FreeIn-App Purchases
#28in Productivity
Docusign - Upload & Sign Docs screenshot 1
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Docusign - Upload & Sign Docs screenshot 3
Docusign - Upload & Sign Docs screenshot 4
Docusign - Upload & Sign Docs screenshot 5
Docusign - Upload & Sign Docs screenshot 6

Securely send and sign digital documents, contracts, and PDFs from any device. Create your own signature, upload files from various cloud services, and manage the signing process with ease. It's a legally binding and secure way to handle agreements.

What We Love

  • 🚀 Easy to use
  • 🚀 Convenient for signing documents on the go
  • 🚀 Saves time and effort
  • 🔒 Secure digital signatures

Room to Improve

  • 🐛 Glitches with placing signatures and text boxes
  • 🐛 Inconsistent performance across devices
  • 🐛 Issues with editing and updating documents

More Digital Certificate Validator App apps to explore

4
Authenticator App†
Authenticator App†
Authenticator App†
2FA Authentication MFA OTP
Free

Secure your online accounts with a versatile two-factor authentication solution. Manage all your authentication codes in one place, offering enhanced security for websites, services, and crypto wallets. Supports biometric access and offline code generation.

Two-factor authentication (2FA)Multi-factor authentication (MFA)Time-based one-time passwords (TOTP)
🔧 Utilities
(2.5K)
free with in-app purchases
5
Signature-App
Signature-App
Signature-App
Sign Docs Now: Fill and Sign
Free

Instantly sign any document from your device without printing. Create a legally valid electronic signature and add it to scanned or uploaded files. Edit documents with text, dates, and checkboxes, then securely share them.

Create legally valid e-signaturesSign, edit, and customize documentsScan or upload any file
💼 Business
(2.6K)
free with in-app purchases
6
Authenticator App ™
Authenticator App ™
Authenticator App ™
Two Factor Authentication
Free

This app provides a secure way to manage two-factor authentication (2FA) for your online accounts. It generates time-based one-time passwords (TOTP) that update every 30 seconds, offering an extra layer of security without needing an internet connection. Features include iCloud backup, cross-device synchronization, and biometric unlock.

Time-based one-time password (TOTP) generationSecure iCloud backup and encryptionSynchronization across all devices
🔧 Utilities
(24K)
free with in-app purchases
7
Authenticator ℠ App
Authenticator ℠ App
Authenticator ℠ App
Authentication App: 2FA, MFA
Free

Secure your online accounts with standards-based two-factor authentication. This app generates time-based one-time passwords directly on your device, offering a reliable second step for sign-ins without relying on SMS codes. Protect personal and work accounts across various platforms.

Secure TOTP verification codesFast and easy account setupFull control over 2FA accounts
🔧 Utilities
(4.7K)
free with in-app purchases
8
Genius Sign: PDF doc signature
Genius Sign: PDF doc signature
Genius Sign: PDF doc signature
Annotate, fill, send documents
Free

Easily sign, date, and annotate documents directly on your device. Import files, add your signature by drawing or scanning, and insert text or dates. Save time with smart features that locate signature fields and repeat initials across pages.

Create and save signatures (draw or scan)Import PDF, Word, and image documentsInsert and format text and dates
💼 Business
(12K)
free with in-app purchases
9
e Signature Scanner, Sign PDF
e Signature Scanner, Sign PDF
e Signature Scanner, Sign PDF
Electronic Document Signer App
Free

Capture your handwritten signature from paper using your phone's camera. The app automatically cleans and refines it for a professional, transparent digital signature to use on PDFs and other documents. Sign contracts, invoices, and agreements quickly and securely.

Scan handwritten signatures from paperAutomatic background cleaning and refinementCreate transparent digital signatures
💼 Business
(2K)
free with in-app purchases
10
Yoti - Your digital identity
Yoti - Your digital identity
Yoti - Your digital identity
Yoti is your ID on your phone
Free

Securely store and share your verified identity and credentials. Prove who you are to businesses and individuals, manage logins with a password manager, and add an extra layer of security to online accounts. Your data is encrypted and only accessible by you.

Secure digital identityProve identity and ageStore and share credentials
📊 Productivity
(12K)
free with in-app purchases
11
VeriFLY: Fast Digital Identity
VeriFLY: Fast Digital Identity
VeriFLY: Fast Digital Identity
Less Contact, More Speed.
Free

This app offers secure digital credentials to streamline in-person experiences. It enables less physical contact, faster processing, and increased confidence for users.

Secure digital credentialsLess physical contactFaster processing
✈️ Travel
(503K)
free
12
Authenticator© App
Authenticator© App
Authenticator© App
Authenticator App - 2FA, OTP
Free

This app provides a secure way to manage two-factor authentication (2FA) for your online accounts. It generates time-based one-time passwords (TOTP) directly on your device, offering enhanced security against interception and SIM swap attacks. Easily set up accounts, access codes offline, and manage your credentials with advanced protection options.

Secure 2FA and OTP generationOffline code accessEasy account setup via QR or manual entry
🔧 Utilities
(398)
free with in-app purchases
13
Singpass
Singpass
Singpass
Your trusted digital identity
Free

Access government services and manage your digital identity securely. Log in quickly using biometrics or a passcode, sign documents digitally, and receive notifications. This app simplifies transactions and provides a trusted way to interact with digital services.

Biometric login (fingerprint, face)QR code loginDigital signing of documents
📊 Productivity
(7.6K)
free
14
eSign App
eSign App
eSign App
Official Electronic Signatures
Free

Easily create and manage electronic signatures for documents. Convert images to signable files, edit PDFs, and securely store your documents with cloud sync. Offers a free tier with limited sign requests and a premium option for unlimited usage.

Unlimited self-signingUnlimited usersLink sharing
💼 Business
(764)
free with in-app purchases
15
Authenticator App ◦
Authenticator App ◦
Authenticator App ◦
Two Factor Authentication, 2FA
Free

This app enhances your digital security by protecting your online privacy and identity. It offers features like privacy detection for photos, two-factor authentication for accounts, secure storage for personal files, and detection of phishing websites. Safely scan QR codes and barcodes to guard against online threats.

Privacy detection for photosTwo-factor authenticationSecure password-protected folder
🔧 Utilities
(982)
free with in-app purchases
16
RSA Authenticator (SecurID)
RSA Authenticator (SecurID)
RSA Authenticator (SecurID)
by RSA Security
Free

This app provides multi-factor authentication for enterprises, offering passwordless security through device-bound passkeys. It supports various authentication methods like OTP, biometrics, and push notifications to secure digital access.

Multi-Factor Authentication (MFA)Passwordless Security with PasskeysOne-Time Passcodes (OTP)
💼 Business
(327)
free
17
Authenticator
Authenticator
Authenticator
Authentication for Google
Free

Enhance your online account security with this two-factor authentication utility. Easily add accounts by scanning QR codes and benefit from bank-grade encryption and biometric unlock for peace of mind. Supports thousands of websites and services.

Bank-Grade EncryptionSecure 2FA and MFA TokensEffortless Setup (QR Scan)
📊 Productivity
(406)
free with in-app purchases
18
Photo to PDF Convert Scanner +
Photo to PDF Convert Scanner +
Photo to PDF Convert Scanner +
Scan Document, Image, Receipt
Free

Transform your phone into a portable scanner to digitize documents, receipts, and images. Convert scanned content to various formats, extract text using OCR, and manage your files efficiently. Secure your documents with advanced features.

Quick document scanningConvert to TXT, PDF, JPEGOCR text recognition and editing
💼 Business
(26K)
free with in-app purchases
19
Authenticator app - 2FA, MFA
Authenticator app - 2FA, MFA
Authenticator app - 2FA, MFA
Two Factor Authentication, OTP
Free

This app provides secure two-factor authentication for over 1000 popular online accounts. It offers quick access via widgets and Apple Watch, and ensures your data is safe with no internet exchange. Easily set up accounts by scanning QR codes or entering secret keys.

Two-factor authentication (2FA)Multi-factor authentication (MFA)Supports 1000+ apps
🔧 Utilities
(5.7K)
free with in-app purchases
20
eSign App: Sign PDF Documents
eSign App: Sign PDF Documents
eSign App: Sign PDF Documents
e-Signature: Signature Maker
Free

Transform your device into a powerful tool for signing PDF documents and other file types. Easily import, scan, sign, and share documents locally, or send them to others for their signatures. Integrates with popular cloud services for seamless workflow.

Sign documents anywhereFill and edit documentsCreate custom e-signatures
💼 Business
(1.5K)
subscription

FAQ about Digital Certificate Validator App

What is the best digital certificate validator app for iPhone?
Signeasy: Sign PDF Documents tops our digital certificate validator app ranking as of July 2026, with a 4.9-star average from 34K App Store ratings, and it's free to download.
Yes — 20 of the top digital certificate validator app we rank are free to download, including Signeasy: Sign PDF Documents and SignNow: e-Signature app.
Signeasy: Sign PDF Documents has no ads and offers in-app purchases, according to its App Store listing as of July 2026.
This app allows you to easily sign documents electronically, send them to others for their signatures, and fill out PDF forms. You can draw, scan, or import your signature, and add various fields like initials, dates, and text. It also supports collecting in-person signatures and managing frequently used documents as templates.
Yes, all signatures made through the app are legally binding. The app provides a detailed digital audit trail for each document, which includes information like the signer's email address, device IP, and completion time, ensuring compliance with regulations like ESIGN and UETA.