New version of "Welder's Handbook" https://play.google.com/store/apps/details?id=insain2.spravochik_svarshika
More grades of electrodes, more types of electrodes, a more detailed and complete description of grades of electrodes (Standards, description of welding electrodes, position of welds in space, chemical composition of deposited metal, mechanical properties of weld metal, application features)
Once you download the Welder's Handbook application, in the future you will be able to find information useful to you without access to the Internet. The application contains information about electrodes, selection of current to electrodes, selection of electrodes by metal thickness, types of electrodes.