It means you pay $59.99 once and the synced cross-device library is yours — no renewal, no “renew to keep getting updates,” no per-seat math. There's also a $3.99/month and a $24.99/year option if you'd rather not pay upfront, but the lifetime is the headline and the reason most people land on this page.
Just as important: the screenshot tool itself is free. You do not need the lifetime license to capture, mark up, save, and share screenshots. On Mac and Windows, region/window/scrolling/ fullscreen capture, the full 8-tool markup editor (pen, highlighter, arrow, shapes, text, blur/redact, crop, unlimited undo), on-device text grab (OCR), local save, and clipboard copy are all free with no account. The lifetime license only unlocks the cross-device layer: cloud upload, a synced web library, shareable links, and cross-device clipboard.