Denpa / Privacy policy

Privacy Policy

Last updated: 2026-09-23 / Applies to: Denpa Network Check (iPhone and Mac)

This is a translation of the Japanese privacy policy. If the two differ, the Japanese version applies.

Denpa is an app for measuring the state of your Wi-Fi and internet connection and narrowing down where a problem is. There is an iPhone version and a Mac version, and they differ in what they can measure and in how the permissions work. See the page for the device you use.

What applies to both

Results and any file you save stay on your device.
Nothing is sent to the developer or to a third party. There is no analytics, advertising, or tracking.
Location is never recorded or sent.
Measuring speed and response time cannot happen without real network traffic. The destinations are listed on the page for each device.
There are no in-app purchases, no ads, and no account.

Where they differ

Each page has the details; the main differences are these.

	iPhone	Mac
Without Location	The network name (SSID) is not shown	Neither names nor addresses are shown, and channel utilization and the least busy channels are not shown either
Without Local Network	Every measurement still runs	Quality to the router cannot be measured
Speed test destination	Cloudflare (three others can be chosen in Settings)	Cloudflare only (cannot be changed)
Nearby networks	Not handled	Names (SSID) and addresses (BSSID) are shown on screen (they never leave the device)

Contact

For questions about this policy, write to the address below.

highislandtec@gmail.com

Replies may take some time.

For how to use the app, or to report a problem, see Support for iPhone or Support for Mac.