SignPDF vs Sign.Plus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SignPDF
Easily sign and fill out PDF documents directly on your device without needing an account. Open PDFs from various cloud services, add your signature, text, and checkmarks, then share or save the completed document.
- Sign documents with your finger
- Fill out PDF forms
- Add name, initial, and date
- Open PDFs from cloud storage
- Export signed documents
- Print documents via AirPrint
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Sign documents anywhere with your iPhone/iPod/iPad! No account required! Need to sign or fill out a document? SignPDF makes it quick and easy to do both and forget about printing, scanning, or faxing. Simply: 1) Open any PDF from your iPhone, iPod or iPad’s Email, Dropbox, Google Drive, Box.Net, etc... 2) Fill out form with your name, initial, date, check boxes and sign realistically with your finger 3) Email the signed document to anyone, print it or upload to Dropbox, Google Drive, Box.Net, etc... SignPDF is typically use to sign and fill documents including NDA’s, sales agreements, celebrity endorsements, real estate contracts, financing agreements, permission slips, marriage documents, and more... *** Key Features: - Sign documents with just a finger - No need to print, sign, or fax documents again - Easily add name, initial, date, check boxes and signature to PDF - Your important docs stays with you on your device. We don't upload it our server! - No sign up process or account is needed. Simply sign docs! - Open documents from your email inbox, Dropbox, and more - Export documents to use in other apps - Printing - Print any document with AirPrint enabled printers Pro Version: - Will have 9 credits - No Advertisement How credits work: - Sign and share one document will consume 1 credit, no matter how many pages long the document is.
Sign.Plus
This app provides a secure and legally-binding electronic signature solution for signing documents on mobile devices. It allows users to fill and sign PDFs, scan paper documents, and send documents to others for signature with tamper-proof audit trails.
- Fill and sign documents
- Send documents for signature
- Tamper-proof audit trails
- Legally-binding electronic signatures
- Paper scanning to digital
- Data encryption
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Sign.Plus is a legally-binding electronic signature solution to sign documents on iPhone and iPad devices and send documents for signature. It’s secure, reliable, cross-platform, and super easy to use. Using this free eSignature app, you can fill and sign PDF documents, Word documents, and other types of supported documents. You can also utilize the paper scanning feature to convert your paper documents to digital documents and sign them electronically. √ Sign.Plus recognized as the best e-Signature solution to fill and sign documents! ◆ Fill and sign documents: Sign.Plus allows you to create an electronic signature to e-sign documents wherever you are and whenever you want. You can draw a signature, type your signature or use your initials. ◆ Send documents for signature: Other than the option to fill and sign documents yourself, you can also send documents for signature. You can send a request for signature even if the signees do not have a Sign.Plus account. You can add various fields to the documents, including signature, initials, date, text, and checkbox. ◆ Tamper-proof audit trails: For every document that goes into the process of signing electronically, there are real-time logs to keep track of any activity that has occurred with information such as name, IP address, email address, device, and much more. The audit trails are non-editable and each document action is thoroughly tracked and time-stamped, serving as legal proof of receipt, review, and signature. ◆ Legally-binding electronic signature: Sign.Plus complies with electronic signature regulations such as ESIGN, eIDAS, and ZertES to ensure it delivers the same legal standing as pen-and-paper signatures. ► Extensive security measurements and compliance offerings ◆ Data encryption: We encrypt all documents at rest using 256-bit Advanced Encryption Standard (AES), with each user’s unique encryption key. Furthermore, to protect data in transit between our apps (currently mobile, API, web) and our servers, we use TLS 1.2+ encryption. ◆ Various compliance offerings: We are committed to certifying ourselves and our e-signing platform for all relevant certifications and compliances, including SOC 2, HIPAA, ISO 27001, GDPR, CCPA, and more. ► Looking for an easy way to e-sign PDF documents? We’ve got you covered If you are looking for a secure document signing app to fill and sign PDF documents, we are here to help. This free eSignature app offers the easiest online signature experience ever, unlike other form filling and e-sign applications. You can sign PDF docs, contracts, leases, NDAs, agreements, and pretty much every type of legal document without having to go through a complicated process. Download Sign.Plus for free on your iOS device, scan/import the document you wish to sign/be signed electronically and, depending on the nature of the document, e-sign it yourself or send it for signature. Sign.Plus features and advantages: • Legally-binding electronic signature solution • Advanced yet easy-to-use document signing platform • Fill and sign PDF documents • Send documents for signature • Create an electronic signature (Type, draw, or use initials) • Extensive regulatory compliance offerings, including SOC 2, HIPAA, ISO 27001, GDPR, CCPA, and more • Scan documents with your mobile camera (automatic document detection, magnifier, border cropping, perspective correctness) • Data encryption • Tamper-proof audit trails • Save documents as draft • Get real-time notifications • Multiple date formats • Free e signature app to sign documents on iPhone and iPad * Sign.Plus is HIPAA compliant, provided the user has advanced security controls activated and enters into a business associate agreement (BAA) with Sign.Plus. Advanced security controls are available on the Enterprise plan tier. Any further questions or requests? Do not hesitate to reach us on our website, app, or by email at support@sign.plus. Our customer support team will be pleased to help you!
Screenshots
Verdict
The clearest difference is rating: Sign.Plus at 4.8 against SignPDF's 4.4. Sign.Plus also leads on update cadence (every 3 weeks vs every 3 months). SignPDF's advantage is iOS requirement (6.0 vs 15.0). On price, review sentiment, ratings volume and ads 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
Both are free to download. SignPDF sells 3 one-off in-app purchases and Sign.Plus sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Sign.Plus holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 105 and 288 respectively. Written reviews split almost evenly too, at 85% and 86% positive.
SignPDF ships an update every 3 months, Sign.Plus every 3 weeks. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.
| Parameter | SignPDF | Sign.Plus |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (105 ratings) | 4.8 (288 ratings) — better |
| Positive reviews | 85.1% of reviews | 86.0% of reviews — better |
| Number of ratings | 105 | 288 — better |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 6.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 12 MB | 137 MB |
| Age rating | 4+ | 4+ |
| Developer | Tektrify, Inc | Alohi |
Customer experience
SignPDF
Sign.Plus
User reviews
SignPDF
From 105 App Store ratingsWhat we love
- 👍 Easy to use and intuitive interface
- 📱 Convenient mobile document signing
- 💰 Affordable pricing with free version available
- ⚡ Fast document processing and export
- 🎯 Saves time eliminating printing and scanning
Room to improve
- 🐛 Frequent crashes and freezing issues
- ❌ App fails to open or load past splash screen
- 💳 Limited free credits requiring paid upgrades
- 🔄 Compatibility issues with iOS updates
- 😤 Poor customer support and unresponsive developers
Sign.Plus
From 288 App Store ratingsWhat we love
- 👍 Easy to use interface
- 🚀 Efficient document signing
- 🔒 Secure document handling
- 💡 Scans everything easily
- 👍 Convenient for quick signatures
Room to improve
- 🐛 Horrible app interface
- 🐛 Difficult to use on phone
- 🐛 Bait and switch tactics
- 🐛 Tricky to unsubscribe
- 🐛 App not working
Bugs and requests
SignPDF
Reported bugs
10 issues- App crashes when saving or exporting documents
- Signature placement doesn't match preview
- App hangs after opening PDF files
- Freezes on iOS 13.1.3 and newer versions
- Grey screen loading issue on tablets and phones
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- PDF export produces unreadable or smeared output
- App stops working after purchase of paid credits
- Missing from 'Open in' menu options
- Fails to open PDFs from Google Drive after updates
- Sample PDF reappears after deletion
Requested features
7 requests- Better credit system or ad-supported alternative
- Automatic text and signature positioning
- Ability to delete saved signatures
- Sync functionality between iPhone and iPad
- More advanced PDF editing features
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- Free credits for positive reviews
- Improved export options and formats
Sign.Plus
Reported bugs
3 issues- App not working
- Freezes occasionally
- Support obstructing work
Requested features
2 requests- Ability to send documents out
- Improved phone interface
In-app purchases
SignPDF
- 6 Credits$1.99
- 24 Credits$4.99
- Unlimited Credits$19.99
Sign.Plus
- Personal Plan (One Month)$14.99
- Premium Plan (One Month)$29.99
- Personal Plan (One Year)$119.99
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- Professional Plan (One Year)$239.99
Questions
Is SignPDF free?
Is Sign.Plus free?
Which has better reviews, SignPDF or Sign.Plus?
Do SignPDF or Sign.Plus have ads?
Which is updated more often, SignPDF or Sign.Plus?
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