iPhone Screenshots


SlimCD for iPhone enables iPhone based credit/debit card authorizations for keyed or swiped (card present) retail environments. Both keyed and swiped authorizations are conducted over a secure 3G or WIFI connection.

For swiped transactions, the IDTECH Unimag II Mobile MagStripe Reader is used; connected using the iPhone headset port. When using the UNIMAG II swipe reader, secure authorizations are conducted with minimal keying. PLEASE BE ADVISED THAT THE UNIMAG II MUST BE INJECTED WITH THE SECURE POSX ENCRYPTION KEY.

For keyed transactions, the cardholder number, expiration date, CVV2 code and amount is entered. Keyed transactions are generally conducted when the card is non-present.

Both keyed and swiped transactions use the SlimCD payment gateway for authorization. All transactions are conducted using either a 3G or WIFI connection using Secure Sockets Layer (SSL) communications.

Prior transactions can also be searched using a comprehensive historical search capability; useful for issuing voids and credits for previously entered transactions as well as for repeating transactions for a given cardholder.

Daily and batch totals can also be reviewed by an administrator.

For printing, you can print to any AirPrint printer on your wifi network. We also support the following Star Bluetooth printers:
[SM-S220i PPID] 121976-0002
[SM-T300i PPID] 121976-0004

What’s New

Version 5.3.1

Update support for card readers in iOS 13

Ratings and Reviews

5.0 out of 5
2 Ratings

2 Ratings

Michael Fritts ,

Great, and getting better!

A great, easy way to accept credit cards. Quick, intuitive app for business owners and their employees. Plus, they're adding features all the time!

Apple fan 3333 ,

Just works

Best way to take cards


Slim CD, Inc
21.7 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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