Sony Cyber-shot DSC-RX100 IV - Manual (Page 195)

[212] How to Use Using Wi-Fi functions Connecting this product and a Smartphone
Calling up an application using [One-touch(NFC)]
You can call up a desired application from the application menu of this product by touching
an NFC-enabled Android smartphone to the product. If the application you call up has a
feature that works with the smartphone, the product and the smartphone will be connected
via Wi-Fi. To use this function, register the desired application in advance.
1.
MENU →
(Wireless)
→ [One-touch(NFC)] → desired application.
2. Switch this product to shooting mode, then touch an NFC-enabled smartphone to the
(N mark) on the product for 1-2 seconds.
PlayMemories Mobile launches on the smartphone, and the application you have
registered launches on this product.
Note
When the product is in playback mode, the registered application will not launch even if
you touch the smartphone to the product.
When you call up an application with one touch, even if that application does not work with
a smartphone, PlayMemories Mobile on smartphone will launch. Exit PlayMemories
Mobile without performing an operation. If you do not exit PlayMemories Mobile, the
smartphone stays in standby connection status.
[Smart Remote Embedded] is assigned to [One-touch(NFC)] as a default setting.
[213] How to Use Using Wi-Fi functions Controlling this product using a Smartphone