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
★3.1
Knock on Ports
Knock on Ports
★4.6
NetPal - netcat for Android
NetPal - netcat for Android
★4.3
iperf - Bandwidth measurements
iperf - Bandwidth measurements
★3.8
UDP Terminal
UDP Terminal
★3.9
Packet Injection
Packet Injection
★3.8
WiFi Controller ESP8266
WiFi Controller ESP8266
★3.8
RoboRemo - Control your Robot
RoboRemo - Control your Robot
★4.7
nc - Netcat for Android
nc - Netcat for Android
★4.0
Network Utilities
Network Utilities
★4.6
Simple TCP Socket Tester
Simple TCP Socket Tester
★4.8
Ping: test high latency, delay
Ping: test high latency, delay
★4.2
TeslaModbusSCADA
TeslaModbusSCADA
★5.0
TCP Telnet Terminal
TCP Telnet Terminal
★4.3