TSN Studio is an independent studio building fast, private, and powerful tools — free for sellers and everyday users.
Our Products
8 free tools built for print-on-demand entrepreneurs — profit calculator, Etsy fee calculator, break-even planner, seasonal calendar, mockup generator, and more. No sign-up, works instantly in your browser.
Prepare for the Canadian citizenship test the smart way. Study the complete official question bank, take timed mock exams to build real confidence, and learn faster with an AI study assistant that gives personalized explanations and study paths. Plus weekly “Did You Know?” episodes of fascinating Canadian facts. No subscriptions, no paywalls — always free.
A powerful PDF toolkit for iPhone and iPad. Scan documents with your camera, sign PDFs with your finger or stylus, fill forms, merge files, and manage your document library — all on your device, all private.
The Android version of DOKR PDF Pro brings the same powerful PDF toolkit to your Android device. Scan, sign, merge, split, and annotate PDFs — completely on-device.
TSN Studio is an independent studio building digital tools for e-commerce entrepreneurs and everyday users. We believe powerful tools shouldn't require expensive subscriptions or complicated setup.
Everything we build is designed to be fast, private, and useful from the moment you open it — whether on the web or on your phone.
Need help with DOKR PDF Pro? View our privacy policies or reach out directly.