Apps like UDP/TCP Widget

Here are some great alternatives to UDP/TCP Widget by K.J.M. :
UDP TCP Server
UDP TCP Server
★4.1
TCP UDP Server & Client
TCP UDP Server & Client
★4.5
UDP Sender / Receiver
UDP Sender / Receiver
★3.2
Knock on Ports
Knock on Ports
★4.6
NetPal - netcat for Android
NetPal - netcat for Android
★4.3
Network Utilities
Network Utilities
★4.6
Packet Injection
Packet Injection
★3.8
UDP Terminal
UDP Terminal
★3.9
WiFi Controller ESP8266
WiFi Controller ESP8266
★3.8
RoboRemo - Control your Robot
RoboRemo - Control your Robot
★4.7
UDP Guard
UDP Guard
★4.1
Simple TCP Socket Tester
Simple TCP Socket Tester
★4.8
Ping: test high latency, delay
Ping: test high latency, delay
★4.1
TeslaModbusSCADA
TeslaModbusSCADA
★5.0
TCP Telnet Terminal
TCP Telnet Terminal
★4.3
TCP Ports list
TCP Ports list
★4.6