Did you really wanted to know?
InstaAgent, a third party Instagram app, which promises that it will able to track users who view your account, have found to be malicious. No surprise there. David Layer-Reiss a developer at Peppersoft, found out that the app sends unencrypted usernames and passwords of it’s users to another server. It all post images on users profile without their permissions.
"Who Viewed Your Profile" #Instaagent will send your Instagram Username and Password to an unknown server! pic.twitter.com/8uZJljJdtO
— David L-R (@PeppersoftDev) November 10, 2015
While it’s not possible to find exact numbers of accounts were compromised, David Layer-Reiss claims that more than 500,000 users installed the app. Anyone who have installed the software should immediately change their password. This is the safest option even though your account may or may not have been compromised.