Note: The Square reader can only be used in the Acuity App by businesses with US-based Square accounts.
Currently, the Square readers are available for use from iOS devices.
The magstripe reader can be connected via the headphone jack. Once connected, the mobile app should recognize the reader. You will then be able to swipe the client's credit card to make a payment.
Just a heads up: The app might request permission to access the headphone jack/microphone. Make sure to tap Okay or Accept so that the Acuity Mobile App can access the connected swiper.
There's no need to download the Square payment app separately; you can connect your contactless reader through the Acuity Mobile App directly. (But it's absolutely fine if you have the Square app installed already!)
If your reader is not currently connected, tap the Reader Settings button. Tap the Connect a Reader button and follow the on-screen instructions to pair your device and reader. You should only have to do this once.
Once the reader is successfully paired, use the back arrow and the the X at the top of the screen to return to the payment page.
Then, when you're ready to take payment, tap the Pay with Square Reader button at the bottom and either dip the client's card or have them tap their device to the reader to take payment.
Check out this quick gif to see the whole process. This uses the contactless reader, but the process works the same for the magstripe swiper. After clicking on the green Pay with Square Reader button at the bottom, swipe the card through the magstriper reader to process.