Strengths
- Launch speed. From shortcut to finished image in a few seconds, with no windows in between.
- Light install. A small installer and minimal background memory use.
- Markup right on the capture. No need to switch to a separate editor for an arrow or a note.
- Simple interface. One toolbar, no nested menus — easy to figure out without a manual.
- Link sharing without a file. Handy when the recipient only needs to view the image in a browser.
Limitations
- Still images only. Video capture needs a different tool.
- Shared upload server. An uploaded capture is reachable by anyone with the link — worth keeping in mind for sensitive material.
- Basic editor. No layers, masks, or fine control over markup tools.
- No full-page capture. Scrollable content is limited to the visible screen area.
For quick markup and sharing, the tool gets out of the way. Once a task goes beyond "select, annotate, send," it makes more sense to look at a tool with a broader feature set.
— overall conclusion of this review
A rundown of tools built for exactly that, and how they differ from each other, is on the alternatives page.