If you're not completely new to Instagram, you're likely to have linked your account with a third party Service at a few points and forgot about it. These services still have access to data like your media and profile information, so it's important that you not only know how to find these "authorized" apps, but you know how to revoke their permissions.
You may not even realize that you linked your Instagram account with another app and it is even more credible that you forgot that you did. Maybe you used an app to monitor who didn't follow you, handle multiple social media, enter a contest or share information on dating platforms. Even if you stop using these third-party apps, they still have access to your account if you don't do something about it.
Even if you sign out or delete a third-party app from your iPhone or Android phone, getting apps with access to your Instagram profile may be able to perform unauthorized actions such as posting content, resembling media, and commenting. Apps that have access to your login email and password are likely to be hacked, and they can only be flattened trying to steal your information.
To increase security and get rid of services you no longer use, as well as possible malicious apps and other bad apples, withdraw their access. But for some reason, Instagram doesn't make this option comfortable, so you won't find the ability to recall apps from the settings in the app on iOS and Android.
Step 1: View your Authorized Apps  Because you cannot recall services from the Instagram app, you need to do so in a web browser. Visit instagram.com/accounts/manage_access in any browser and sign in to your account. If it asks you to save your data after logging in, select "Not Now" – there is no need to save your login to a browser, unless you use the browser for all of your Instagramming.
Alternatively, you can access these settings by logging in to instagram.com in your browser, choosing to save login details or not, tapping the cogg on your profile page and selecting "Authorized Apps" from the menu that appears.
Step 2: Revoke Access to Unused Services
Under Authorized Apps you can see every application that has access to your Instagram account with an app summary of each. If you do not have any connected services, it will say "you have not approved any applications for accessing your Instagram account."
If you have little, you see what shows what permissions each app has, for example access to your basic information, such as viewing pictures, commenting on posts, uploading to your account, etc. To stop an app from doing any of this, press "Revoke access" and then "Yes" when you ask if you is certain.
Do this for every third party application you want to revoke access to. By recalling access, the connection between Instagram and that app will break. For example, if you revoke access to Hootsuite, you can no longer configure scheduled posts on Instagram with it. You must re-grant access to the social media management platform to access this feature again.
Step 3: Change your password only in case
If you suspect a third party has posted unauthorized content on your Instagram account, or if you do not recognize a service that you have just revoked, you should definitely change Your password.
To set a new Instagram password, open the app on iOS or Android and tap the profile icon. Then press the menu with three points and go to "Settings". Go to "Privacy and Security" on iOS or Account on Android and select "Password". Enter your old password, enter a new one and then save.
This article has been produced under the Gadget Hack's special coverage of smartphone privacy and security. Look at the entire privacy and security series.