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Hi, the app does in this version and all future versions not require a login. In future versions you will be prompted for a login if you do operations that require a login. Also you can inspect the code at github https://github.com/riensen/steem-app
Also the code was reviewed by Apple

This is NOT an approved iOS app. Test Flight is a beta Testing channel which does not require the Apple's approval and without going through the real review process. I am a real iOS Developer and I know what I am saying. I exposed his lie here:
https://steemit.com/steemit/@rixky/riensen-s-ios-app-approved-by-apple-is-a-lie-and-misleading

Obviously you should make sure any app you use is legitimate but you can also protect yourself by logging into the app (once that feature is available) using your posting key. That limits the app to posting and voting, and blocks any attempt to access your funds.

If you wrote means to be afraid not worth anything ! go ahead ! This is another step to great success !