iPv4Stuff!PRO app for iPhone and iPad

Ipv4 Stuff! is a pedagogical tool that can be used to teach or learn about IPv4 addressing, including basic ANDing operations to find a network address, and very very flexible subnetting and VLSM calculations. All subnet calculations can be stored or shared by email, sms, facebook and twitter.
Summary of all main features:

IPv4 CALCULATOR.
* It includes an Interactive Network Form to play with IP Settings (host, gateway and network). In addition, it includes a new classful and reserved addresses chart.

SUBLETTING CALCULATOR.
* It includes a subnet chart and a decimal to binary chart.

VLSM CALCULATOR.
* It includes two calculation modes: an automatic mode based on entered net sizes, and a manual mode that exercises the use of table of masks.

IPv4 ROUTE SUMMARIZATION.
* It supports classful and classless route summarization.

PING MONITORING TOOL.
* Monitoring tool to test site reachability. It can also use the IP geolocation tool for site geolocation.

IP GEOLOCATION.
* Tool for positioning on a map the entered IP addresses or dos names, including its related host and ISP data. It also gives your external IP and its Geolocation.

Optimized for iPhones 5/5S. Fully-compatible with iPhone 6, and iPhones 4/4S.