Comparison

StampDoc vs Blitz Key

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

StampDoc

Easily sign PDFs and images, create custom digital stamps, and manage your documents securely from your iPhone or iPad. Streamline your workflow by going fully digital, eliminating the need for printing and scanning.

Highlights
  • Sign PDFs and images
  • Create custom digital stamps
  • Signature editor and scanner
  • Import and reuse stamps
  • Built-in PDF and image viewer
  • Save and share signed files
Features
Read full description

Do you need to sign documents, stamp PDFs, or add signatures to images directly from your iPhone or iPad? With StampDoc, your device becomes your digital signing tool. StampDoc helps you sign PDFs, create professional stamps, and manage your documents securely—all in one place. Forget about printing, scanning, or using complex software. Key Features Sign PDFs and Images: Add digital signatures to PDFs, photos, or images (JPG, PNG) with precision. Ideal for contracts, invoices, agreements, and more. Signature Editor: Create and personalize your signature. Choose thickness, color, and style, then save it for future use. Signature Scanner: Capture your handwritten signature using the camera or import from your gallery to convert it into a digital signature. Digital Stamp Creator: Design stamps—circular, square, or angled—with custom text, colors, and styles. Perfect for professionals who need official marks on their documents. Import and Reuse Stamps: Bring in existing stamps from your gallery or scan them to apply on any file. Built-in PDF and Image Viewer: Open and review your PDFs and images directly within the app. Save and Share: Export signed documents as high-quality PDFs or images, then share them instantly via email, cloud services, or messaging apps. With StampDoc you can Sign PDFs securely and professionally. Create digital signatures and stamps in seconds. Convert handwritten signatures into electronic ones. Manage, save, and share your signed files anytime. Streamline your workflow by going fully digital. Turn your iPhone or iPad into your mobile signing and stamping office. Download StampDoc today and simplify the way you sign and manage your documents. Privacy Policy: https://www.amcompany.net/privacy-policy-am-payroll/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Blitz Key

Read full description

Blitz Key is a mobile corporate authenticator for employees of organizations using the Blitz Identity Provider platform. The app provides secure and convenient access to corporate systems by enabling second-factor authentication – one-time codes and push notifications for login confirmation. One-Time Code Generation (TOTP): Blitz Key generates time-based one-time passwords for login, adding an extra layer of security to your account. Offline Mode: Generate codes and confirm logins even without an internet connection – ensuring reliable performance in any environment. Push Notifications: Blitz Key instantly sends a notification to your phone so you can confirm login with a single tap – no need to manually enter a code. Integration with Corporate Services: A single app for login confirmation across all systems connected to Blitz Identity Provider – one tool for every employee. Multiple Account Support: Access different services using multiple accounts within one app – no need to switch between apps or devices. Ease of Use: An intuitive, user-friendly interface with quick setup. Link your account and get started – with no unnecessary complexity. Blitz Key combines convenience and security, helping employees meet corporate compliance requirements effortlessly. Make multi-factor authentication a seamless experience with Blitz Key!

Screenshots

StampDoc4 screens
Blitz Key4 screens

Verdict

The call

The clearest difference is device support: StampDoc at 3 against Blitz Key's 1. StampDoc also leads on iOS requirement (15 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

StampDoc ships an update every 2 months, Blitz Key every 6 weeks. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

Scorecard2 real differences · 7 level
StampDoc versus Blitz Key: the parameters behind the verdict, then further details
ParameterStampDocBlitz Key
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 2 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15 — better18.0
Further details — not scored
Size67 MB8 MB
Age rating4+4+
DeveloperAnyelo MorenoREAK SOFT, OOO

In-app purchases

None

StampDoc

No in-app purchases

None

Blitz Key

No in-app purchases

Questions

Is StampDoc free?
StampDoc is free to download, with no in-app purchases.
Is Blitz Key free?
Blitz Key is free to download, with no in-app purchases.
Do StampDoc or Blitz Key have ads?
Neither StampDoc nor Blitz Key shows ads.
Which is updated more often, StampDoc or Blitz Key?
StampDoc ships an update every 2 months, and Blitz Key every 6 weeks. Most recently, StampDoc was updated on October 4, 2026 and Blitz Key on October 9, 2026.

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