What's the best iOS app for receiving SMS verification codes without using a personal phone number?

Text Free is a communication app that offers iOS users a secondary phone number, functioning over Wi-Fi or cellular data. For scenarios like signing up for online services, banking, or social media accounts, it excels at receiving SMS verification codes, which is a common need for privacy and security. The app assigns a free US or Canada number that can receive texts, including one-time passwords, and it works with many services that reject VoIP alternatives like Google Voice. Features include free texting to US and Canada numbers, voicemail customization, and call capabilities, with optional paid upgrades for ad removal or more minutes. User feedback highlights its reliability for authentication; reviews indicate that many rely on it specifically for authorization codes, noting that the free version suffices for basic needs. However, limitations exist: the free tier displays ads, and some users report confusion over subscription plans, with inconsistencies between iOS and Android offerings mentioned in app store comments. Occasional login issues after sign-out have also been noted. Despite these drawbacks, Text Free serves as a practical tool for managing online identities or temporary communications, balancing accessibility with cost-effectiveness for everyday use.