Free texting apps give you a number, but most are VoIP lines that apps refuse for verification. Here is which kinds of app and service actually receive verification codes, and when to use each.
The kinds of apps
- Free texting and calling apps: good for chatting; VoIP numbers that banks and many apps refuse.
- Authenticator apps: create two-factor codes on your phone; they do not receive SMS.
- SMS verification services: give you a real mobile number to receive one code or rent for days.
- Public receive-SMS sites: free and shared; anyone can read your code.
Which to use when
- Sign-up code for one account: an SMS verification service, one-time number.
- Two-factor on an account you keep: an authenticator app.
- Codes again later: a rental number.
- Quick test: a free public number.
Free options
Our free numbers lend real mobile numbers in 100+ countries for one code. When an app refuses a free number, a private number from a few cents usually works.
How to choose
- Decide whether you need the number once or again later.
- Check if the app you are verifying refuses VoIP numbers (most popular apps do).
- For one code, use a one-time non-VoIP number; for repeat codes, rent one.
- For two-factor on your own account, prefer an authenticator app.
Red flags
- Services that charge before any code arrives with no refund.
- Promises that every app will work.
- Apps that ask for your codes or passwords for other services.
FAQ
What app can I use for verification codes?
For receiving SMS codes, an SMS verification service with non-VoIP numbers; for two-factor, an authenticator app.
Do free texting apps work for verification?
Sometimes, but many apps refuse their VoIP numbers.
Is there a free app for verification codes?
Authenticator apps are free for two-factor; free numbers work for tests.
Are these apps legal?
Yes, for your own accounts and privacy.
Which authenticator app is best?
Google Authenticator, Microsoft Authenticator and similar apps all work; pick one that can back up to your account.
Can one app receive codes for every service?
No service controls what each app accepts; a non-VoIP number works with most.
Related: temporary phone number for verification · non-VoIP numbers · free numbers.
