Shottr is free, tiny and very good at scrolling capture anywhere on screen. Aspects is a renderer with a different job. When each one wins.
Shottr deserves its reputation. It is about three megabytes, it is free, it is fast, and its scrolling capture works in places a browser extension cannot reach — a Slack thread, a Pages document, a PDF in Preview.
If you want a scrolling screenshot of something that is not a web page, Shottr is the answer and Aspects is not. Aspects loads URLs; it does not capture arbitrary windows.
Where they genuinely differ
Stitching versus rendering
Shottr scrolls the thing on screen and stitches the result into one tall image. That is the right approach for a document and it is very well executed.
Aspects drives a page in its own WebKit view and renders frames from it. The output can be a still, but it can also be an MP4 of the page scrolling — which is a different artefact, not a better screenshot.
Shape
A stitched screenshot is as tall as the page. An Aspects export is whatever ratio you set, with the source composed inside it. If the destination is a feed, that difference is the whole job.
Price
Shottr is free. Aspects is a paid app with an optional subscription for cloud. That is a real difference and it should be part of the decision — a free tool that does your job is better than a paid one that does more than your job.
Which to use
- Scrolling capture of anything on screen, at no cost — Shottr.
- A web page at a specific ratio, or as video, or twenty of them consistently — Aspects.
- Both — they do not overlap enough to conflict.