Question: Connecting the TC01B to an iPhone 15

How do we connect the iOS TC01B to iPhones 15 or newer?

Answer: Lighting to USB-C Adapter

The iPhone 15 or newer uses a USB-C port to charge or attach accessories. In the past, iPhones used a proprietary connection call Lightning to charge and connect to devices, and the TC01B uses this connector. The camera is still fully compatible, but requires an adapter to go from Lightning to USB-C. We know the official first-party Apple adapter works so we recommend that one: 

https://www.apple.com/shop/product/MUQX3AM/A/usb-c-to-lightning-adapter

Question: Connecting the TC01A/TC01B to a phone with a protective case

How do we connect the TC01A or TC01B to smartphones that use thick protective cases?

Answer: Create an inexpensive support with household products

Many users have a protective case over their phones, but the TC01 was designed to fit flush against a bare smartphone. An adapter or extension cord can allow the camera to connect with any thickness of case, but results in the camera left loose and prevents easy use.

To be effective, the camera needs a steady support. A makeshift DIY support structure can be constructed out of simple materials. This allows the user to hold the phone and camera in one hand, and can then easily take photos and video with the other.

For example: a paint stirring stick, L bracket, and rubber bands can hold everything together like so:
(Example here shows specifically a TC01B and Apple Lightning to USB-C Adapter)