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Inkstep: Fill & Sign PDF

com.whirlwind.inkstep
Productivity Free In-app purchases Everyone Open on Google Play
100+
installs · ≈322
—
0 ratings
2026-09-15
first release
2026-10-13
last update

Description

Fill and sign PDFs offline. No account, no internet, nothing leaves your phone.

Inkstep fills and signs PDFs on your phone, completely offline. No account. No sign-up. No internet. The app has no internet permission, so Android itself will not let it open a connection. Your documents cannot leave your phone. FILL AND SIGN • Sign a PDF or a photo. Share it to Inkstep from WhatsApp, Gmail, Telegram or Files, or open it from your device. • Draw your signature with a finger or a stylus, or photograph the one you sign on paper. It is saved for next time. • Fill in forms: text, dates, check marks and crosses. • Scan paper to PDF with the camera, then sign it. • Save the result or send it straight back. PRIVATE BY DESIGN • No account, no ads, no analytics, no tracking. • Your original file is never changed. Inkstep works on a copy. • Signatures stay in the app's private storage on your device. YOUR PDF STAYS A PDF Your signature is added on top of the existing page. Text stays selectable and searchable, and the file stays small. FREE Unlimited signing, form filling, saving and sharing. One saved signature. Single-page scanning. PREMIUM: ONE PAYMENT, NO SUBSCRIPTION • Unlimited saved signatures • Add a mark to every page at once • Scan several pages into one document • Organize pages: reorder, rotate, remove, add • Open a PDF with its password, and add a password to yours • Redact: black out text so it is really gone. That page's text can no longer be selected • Your company's stamp: photograph it once, place it on any document Nothing renews. Everything that is free stays free. ABOUT THESE SIGNATURES Inkstep applies a visual electronic signature — the digital equivalent of ink on paper. It is not a certified digital signature (X.509 / eIDAS QES) and makes no cryptographic authenticity claim. ABOUT SCANNING The scanner is Google ML Kit, part of Google Play services. Scanning happens on your device and your scan does not leave it, but that part is Google's software under Google's privacy policy. Everything else in Inkstep works without it. Available in 16 languages.

What's new

New in this version: • Signature from a photo: sign on paper, photograph it, reuse it • A refreshed design • 11 more languages New in Premium: • Organize pages: reorder, rotate, remove, add • Open and protect password PDFs • Redact: black out text so it is really gone • Your company's stamp, from a photo

Details

Version1.1.0
Minimum Android version10
Reviews0
In-app prices$5.99 per item
Available inworldwide (242)
Developer contactson the Business plan
Collected2026-11-13

This data in the API

The full record in JSON costs 1 token.

curl -H "X-API-Key: YOUR_KEY" \
  "https://apkapi.com/api/v1/app?id=com.whirlwind.inkstep"