The days of printing out a contract, signing it with a pen, taking a photo of it, and converting that photo back into a PDF are officially over.
Today, you can execute legally binding contracts, lease agreements, and NDA documents entirely on your Android smartphone using an electronic signature. But how do you do it without paying a $15/month subscription to DocuSign or Adobe Acrobat? The answer is an offline PDF signer like OfflyPDF.
Are Mobile Electronic Signatures Legally Binding?
Yes. Under the U.S. ESIGN Act of 2000 and the European Union's eIDAS regulation, an electronic signature carries the exact same legal weight as a wet-ink signature for almost all standard business and personal contracts.
As long as the intent to sign is clear and the document is not tampered with post-signing, a signature drawn on your Android touchscreen is fully enforceable in court.
How to Draw Your Signature with OfflyPDF
OfflyPDF allows you to apply signatures locally on your device, meaning your contract is never uploaded to a third-party server for processing:
- Open OfflyPDF and tap the 'Sign & Stamp' tool.
- Select the contract PDF from your phone's storage.
- Tap the 'Signature' icon and choose 'Draw Signature'.
- Use your finger or a stylus to sign your name on the screen. OfflyPDF converts your strokes into scalable vector graphics, meaning it will look incredibly crisp even if the document is printed later.
- Drag the signature to the correct line on the contract, pinch to resize, and tap 'Apply'.
Using an Image or Company Stamp
If you have a PNG image of your official company seal or a pre-scanned wet signature, you can use the 'Image Stamp' feature to overlay it seamlessly onto the document with a transparent background.
Frequently asked questions
Quick answers to what people ask most about this topic.
No. Unlike cloud-based signing portals, offline apps like OfflyPDF require zero account creation. You just open the app, sign the file, and save it directly to your phone.
Adding a signature on Android should be fast, free, and private. Stick to offline tools to execute your contracts securely on the go.
Try every tool mentioned here
Free, offline, on Android — no account required.
