InstAgent is for people who want to look at someone's Instagram without the owner seeing it. You can download from there too, but staying invisible is the real selling point. The profile owner never learns about it and never agreed, and Instagram isn't fond of services like this.
Send the bot a profile and it shows you the contents right in Telegram: photos, videos, Reels, live streams. You never open Instagram yourself, so you won't show up in anyone's viewer list.
The unusual extra is a mutual follows search, which tells you which accounts two people both follow. There's also an updates section, settings and support. The project runs its own news channel, though the bot works without you joining it.
It's a paid bot, and the plans sit behind their own command. How much you can view for free, or whether a free tier exists at all, isn't stated; you'll find out after starting.
Now soberly. Anonymous viewing and digging up mutual follows means watching specific people who never asked for it. Instagram forbids automated data collection, and if the service loses access, you're simply left without what you paid for. What you download belongs to someone else, too: reposting it without the author's permission isn't on.
Tap Open, then Start and send the name of the Instagram profile you want to view.
Tap a star — you can change your vote later.