Castro – Check the performance of your device in real-time

[App] Castro


Castro  Castro is a huge collection of information about your device and a set of tools for monitoring its status.

This allows you to check the performance of your device in real-time!

Large collection of the information
Castro processes and displays a huge amount of information, namely:

Detailed processor statistics (CPU and GPU);
Battery monitoring;
Consumption of all kinds of memory;
Data usage via Wi-Fi and mobile networks;
Real-time sensors data with useful graphs;
Detailed information about device’s cameras;
Full list of available audio and video codecs;
Monitoring temperatures of the device;
And many other features, including DRM and Bluetooth!

The most important thing in the “Dashboard”
If you are not interested in too detailed information in a larger volume, you can always use the “Dashboard” window, which collects all the most important information – CPU usage, battery status, network usage, and memory load on the device.

More control with useful tools
Share your device information using “Data export”;
Test your display state via “Screen tester”;
Check the noise around you with “Noise checker”.

Even more features with “Premium”
Deep interface customization with various colors and themes;
Configurable home-screen widget, with information about battery, memory, and more;
Network traffic speed monitor to track your connection speed;
CPU usage monitor to keep abreast of frequency usage;
PDF format for information exporting;
And even more coming soon!

FAQ and localization
Looking for answers to frequently asked questions (FAQ)? Visit this page: pavelrekun.dev/castro/faq/

Want to help in Castro localization? Visit this page: crowdin.com/project/castro

Castro user reviews :

Just great, saves me Googling to find out “Does my phone have x?” So much info about my phone that I didn’t know is available. Clearly laid out, pleasant on the eyes. Useful monitoring as well, like battery temp. And it’s free(mium), with no ads. Can’t see a reason not to recommend to anyone.

Probably the best app to keep an eye on your phone’s temps and gather more knowledge about your phone the simple, minimal and straight forward design really makes this app a pleasure to use. In my opinion this app doesn’t need any improvement its already perfect

Freeze on clicking MEMORY (blank screen) refund the premium, I have send an Email before and was told to include a screen shot which I did but was ignored, note 10+ maybe it is not compatible with 256GB, WORK on Galaxy S7 edge
  • Pavel Rekun
  • Hello Ben. I am working on a fix for this issue, however, it is pretty hard to reproduce it, because in most cases it is a root-related problem. I will let you know when the issue will be fixed.

The best app ever I saw , it’s 100% better than cpuZ and it’s really really user friendly and just simple.

This is probably wierd but when I was younger I use the settings of a phone a game and here I am, more options! I also get know more of my phone and tell what it’s feeling so my phone got better and in a greater condition. I hope y’all fix the bugs and will expect a higher rating.
  • Pavel Rekun
  • Hello and thank you for your feedback.
Very well designed app with tones of system info. I really appreciate the developer offering this app without ads and the premium version that adds even more functionality.
  • Pavel Rekun
  • Hello and thank you for your feedback.
Hey,everything is good with this app I use a redmi note 9 pro international variant It has a 16mp front cam but the app shows that it only has 3.9mp Is it some kind of bug something? Can you let me know or inform about this?
  • Pavel Rekun
  • Hello Ahmed. As I have stated in the app, some devices have incorrect built-in data about cameras and information may be incorrect in any of the apps like Castro. I can’t fix it.
Solid free app, but I just got notification spam for other apps from the developer.
  • Pavel Rekun
  • Hello Marcel, during installation of the app you have been asked about your wish to receive “promotional” notifications, and seems, that you have selected it. This feature is disabled by default and can be changed in the app’s settings. Have a nice day!
It’s a great app, but it doesn’t recognize my face unlock. My ROG Phone 3 got face unlock, but the app says Not Supported.
  • Pavel Rekun
  • Hello and thank you for your feedback. This information is temporary removed from the app, cause it is really incorrect for some devices.
Pretty good, but the dark theme is a little ugly with the pastel colors [Edit] yes, but I cannot change the colors of the icons.
  • Pavel Rekun
  • Hello Matthew, there are a plenty of colours to mix with dark theme, I bet you can find anything pretty looking

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