Use case: "how to download a file using a link"
The idea is simple: every Telegram post has its own link. If you already have access to the source, SpyGrabs can process that link and return the files along with the message text, when it is available in the post.
Many users try to save materials by forwarding messages to Saved Messages. This does not always work: forwarding can be disabled, inconvenient, or simply too slow when there are many files.
A post link solves the problem more precisely. It points to one specific message, so the bot works on that exact post rather than browsing the whole channel.
For public channels you get 2 free downloads per day — usually enough to check how the service works.
If you regularly work with Telegram materials or need to access private sources, Personal is the right option: it covers regular downloads and private scenarios that require authorization or a working invite link.
If you need not one post but an entire course, archive, or library of materials, collecting dozens of links one by one makes no sense. The better choice is Archive Start for 1490 RUB: a one-time full export for a single channel or chat, which also includes 30 days of Personal as a bonus.