Yes! Sling Money only works on smartphones. We don't have a browser version right now (we're exploring the idea, so please let us know if this is something you're interested in). You need a recent smartphone running iOS or Android with biometric verification enabled to:
Use the Sling Money app
Set up a Sling Wallet
Send Sling Links
In our supported countries, you do not need a smartphone to redeem a Sling Link to your bank account, debit card, or mobile money wallet.
Also, keep in mind that the main reason we ask for your phone number is so your contacts can find you in the Sling Money directory, if you allow them to. You can log in to and use Sling Money via email, so even if you do not have access to your phone number (while traveling, etc.), you are still able to use Sling Money.