Flume supports adding 5 main accounts.
Using the account-linking feature, you can link up to 4 additional child-accounts that can be linked to a single parent account. This theoretically permits up to 24 accounts to be used Flume as a result (5 main accounts, each with 4 child accounts). These limits mirror those of the official Instagram mobile applications.
If you need to add more accounts, you can use Flume's one-click login feature which will allow you to quickly switch which accounts you are logged in with. You will continue to only receive Push Notifications (if enabled) for the accounts currently logged in.
Note: Versions prior to Flume 3.0 permitted an unlimited number of accounts to be added to Flume with a Flume Pro licence. Due to security and technical reasons, this requirement and account limit no longer applies.