As someone who’s been reading this for months, I want to add to what @SophieMills said: while prioritizing official apps is by far the safest route, it’s also important to regularly change your Instagram password and enable two-factor authentication, especially if you’ve ever entered your credentials into a third-party tool—even just once. Based on many reports here, recovering from a compromised account is much harder than people expect. Vigilance before and after using any tools is key.