They say a habit takes
21 days.
That’s the bar we build for: small, privacy-first browser tools that do one job so well they disappear into your routine — and never ask for more than they need.
day 1 → day 21 · the point where a tool stops being a tool
Shipping now,
built the Day21 way
Shipping now · browser extension
Bulk Social Media Downloader
Bulk-download photos and videos from most major social platforms — queued, resumable, and processed entirely on your device.
Shipping now · browser extension
FreezeFence
Keep the background tabs you choose awake — stop the browser from freezing or discarding them.
What’s next
on the workbench
- Social BackupBack up your own social accounts — posts, photos, and videos — into a tidy folder tree you control.coming soon
- KeepLocalPrivate, AI-assisted bookmarking designed to keep your data under your control.coming soon
- CameraSubtitleLive bilingual subtitles over your camera feed in video calls, with a transcript you can revisit.coming soon
Each of these ships with its own plain-English privacy policy and terms — same as everything we make.
Three rules,
every product
One job, done well
Every tool has a single, clearly stated purpose. No feature sprawl, no upsell mazes, no settings you need a manual for.
Privacy as the default
Processing happens on your device wherever possible, and each product’s privacy policy says exactly what it does — in plain English.
No dark patterns
No nagging, no fake urgency, no hard-to-cancel anything. If a tool has to trick you into keeping it, it isn’t good enough.
Questions? A real person reads every email.
No ticket queues, no chatbots — just day21dev2026@gmail.com.