Yes — the text processing all happens on your device. This means:
• Bionic Reading, formatting, OCR, and text-to-speech all happen entirely on your device
• During the free trial, nothing you open is uploaded anywhere at all
• There is no analytics or tracking
There are two exceptions, and both apply once you have a license. The first is cross-device library sync. Once you activate a license on a device, documents you add to My Library are stored securely on our servers, along with your highlights and reading position, so they follow you between your Windows, Android, and web apps. This is capped at 250MB across up to 3 devices per license, and each document syncs as a full copy including its original formatting. You can turn sync off on any device with the Sync switch in My Library; while it is off, nothing from your library is uploaded or downloaded. To have copies already stored with us deleted, email us at support@typeshifter.com. See our Privacy Policy for the full detail.
The second is the optional AI Tools add-on (Summarize, Translate, Simplify, Ask a Question, Flashcards, OCR Cleanup, and Describe Images). Using any of these sends the relevant document text to our AI provider to generate a response, only when you actively choose to use one of these tools. Offline Translate on Windows is different: it runs entirely on your device and never sends text anywhere.
The only data stored on your device regardless of sync is:
• Your trial/premium status (to know if you've purchased)
• Names of your last 5 files (for the Recent Files feature - NOT the content)
• Your preference settings (like Bionic Reading intensity)
This data stays on your device and can be cleared by clearing your browser storage. We don't use analytics, tracking pixels, or any data collection tools beyond what's needed to make sync itself work.