I’ve tried quite a few system monitoring apps over the years, and Device Kit is one of the better ones. The interface is clean, the information is easy to understand, and it gives you a surprisingly detailed look at your iPhone’s performance without feeling cluttered. I especially like being able to monitor CPU, memory, battery, and network usage in real time, and the widgets make it easy to check everything at a glance. It’s clear that a lot of thought went into both the design and functionality. If you’re someone who likes knowing what’s going on under the hood of your device, this app is definitely worth checking out.

Downloaded it to check battery and RAM, but ended up loving the real tools. The home screen widgets show CPU & network without even opening the app. The Picture-in-Picture mode is great while gaming or on calls. Battery temp and cycle count were accurate, and it helped me catch another app draining my battery for no reason. One of the few apps I actually use daily, and the Lifetime price is very fair compared to others. Recommend it to anyone who cares about their device’s health.

The interface is clean, the information is easy to find, and I ended up using it much more than I expected. If you're buying or selling a phone and want a better understanding of its condition, this app is definitely worth having. Highly recommended!

Really useful utility app for checking device performance. I like how it shows CPU and system info in a clear, simple way without feeling cluttered. It’s handy for quickly understanding what’s going on under the hood, especially when something feels slow or off.