Network Analyzer
Network Analyzer is a simple and useful tool for network diagnostics, LAN scanning and detecting possible problems on your iPhone. With the tools it provides, Network Analyzer will help you diagnose various problems with your wifi network setup and internet connection. It also offers the ability to discover Wi-Fi devices including all LAN device addresses and names, display useful information related to your network connection and much more.
System Status: hw monitor
If you are interested in details about your iPhone's system resources, you can try an app called System Status: hw monitor. The System Status app displays basic device parameters such as battery level, disk usage, CPU load, and network connections. Here you can view a graphic display of the battery level, monitor the ratio of used and free disk capacity or perhaps display details of the network connection.
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Device Monitor
Device Monitor also works similarly. This useful helper allows you to view all information about the currently used device in a simple and fast way. You'll have better visibility into which sensors apps have access to, so you can better protect your privacy. In addition, Device Monitor also offers information about memory and freeing options, storage, CPU or network connection.
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CPU Monitor – RAM, OS & Battery
CPU Monitor is an application that provides powerful graphical monitoring of your device. It provides clear and understandable information about the status of your hardware, operating system, processor, memory, GPU, networks, storage and battery, including a real-time visual display for all your iOS device. CPU offers detailed statistics, graphs and other useful data.
SnapStats
SnapStats is a sophisticated tool for monitoring system resource statistics of your iOS device. SnapStats is designed with user comfort in mind, offers the ability to work in offline mode and its user interface is compact and clear. SnapStats shows you all the important statistics, and also offers support widgetto the iPhone's home screen.
What you really need is to have coconut installed on your Mac.Battery and check your battery once in a while iphone