KDN Technologies is the developer of the Hyakume IP Camera Viewer app for Android, available on the Google Play Store and Amazon Appstore.
A Viewer Client for IP Camera Video Streams; Watch, Record, Relay

In Japanese folklore, the Hyakume (百目, "hundred eyes") is a yōkai ("strange apparition") covered by a multitude of large, unblinking eyes. It usually shelters overnight in abandoned temples, protecting them from would-be thieves & vandals.

When a suspicious individual approaches, the Hyakume will send an eye out to attach to the stranger's garment. It remains with the person until he or she passes out of range, then returns to the Hyakume's body.

Use the Hyakume app to easily view & record the H.264 & MJPEG video streams produced by a wide range of IP cameras (security, surveillance, doorbell, webcams, traffic, weather, repurposed smartphones, etc.).

Hyakume can store up to one hundred Camera entries in 10 Camera Lists (10 Cameras per List). Create separate Camera Lists for your various IP camera locations (home, business, storage, etc.).

To add a Camera entry, give it a unique name & provide the target IP camera's IPv4 address, video stream path, format & port number.

Tap a Camera entry to view it.

While viewing, you can record video, capture snapshot images, & expand the view to full-screen.

Hyakume can be run in dedicated Relay Server mode, which provides free on-demand remote viewing of local IP cameras (spare Android device required).

Relay Server Setup
• Install Hyakume on the device & add local IP Cameras to your DEFAULT Camera List
• In Settings, enable Relay Server mode & specify a username/password & listening port number
• Port-forward the Relay Server's IPv4 address & selected port on your router/gateway if necessary
• Start the Relay Server to enable free remote access

Enable Web Client mode to remotely view IP cameras with desktop/mobile web browsers.

NOTE:  Remote connections are secured by strong TLS/SSL encryption & mandatory client authentication.

Hyakume Features
• Supports the low-latency H.264 & MJPEG video streaming formats
• Records video segments & captures snapshot images
• ONVIF device discovery locates local IP cameras
• Relay Server provides FREE remote access
• Basic motion detection
• Displays cameras in List/Grid format, Dark/Light modes
• Designed for phones & tablets

Hyakume requires no subscriptions, fees or cloud accounts.

Buy the app once, use it forever (well, for the life of your phone).

App Screenshots
Hyakume Privacy Policy