The text discusses some of the drawbacks associated with using the Google Authenticator app for Two-Factor (2FA) authentication on iOS devices, specifically in relation to Time-based One-Time Passwords (TOTP). Some of these issues include:

1. Lack of backup functionality: Unlike other authenticators, Google Authenticer does not allow users to save or back up their one-time codes anywhere except within the app itself.

2. Clunky user interface: Users have reportedly found navigating through certain features in the application somewhat challenging due to its design and layout choices made by developers at that time when compared against alternative solutions available today!

3. Inadequate support for wearables like smartwatches: The absence of compatibility with wearable devices such as watches means users cannot access two-factor authentication using these types if they prefer doing so.

4. Treating non-Google properties poorly - the app seems to view any property that isn't directly managed by Google itself (for example, a personal domain) less favourably compared against its own services which may lead some people feeling discriminated upon usage experience alone without clear justification provided within application settings themselves let alone receiving proper support when issues arise from using third-party apps outside mainstream ecosystem standards established primarily around google products only.

5. Limited customization options: Users are unable to customise certain aspects of the app's behaviour or appearance beyond what is pre-set by default, which may not suit everyone's preferences regarding how they want their two-factor experience presented on screen each day before entering unique codes every time requested via separate apps installed separately from main browser windows open across multiple tabs simultaneously but still within same larger computing environment overall.

6. Lack of protection for OTPs: Unlike other authenticators, Google Authenticator does not provide any robust mechanisms to protect the one-time passwords (OTPs) themselves once they are generated and stored on the device. This vulnerability leaves users susceptible to various types of attacks if an unauthorized party gains access to their device or extracts sensitive data from memory.

Overall, while still functional for basic TOTP needs due historical reasons mentioned earlier - especially before more modern alternatives became widely available years later after initial release date back then!

Google authenticator ios app totp