Don't know if this is the right forum, but is the closest match I could find. Recently, I searched through the APP Store for ham radio-related apps. Searched using the term "QRZ" and also "ham radio". Saw a variety of apps, some free and some up to $3. Some were for propagation, antenna construction, call signs, etc. My question is: Of those of you who use smartphone ham apps, which ones do you find outstanding (whether they are free or costly) and which are a waste of time and/or money? I know this is a general question, but curious if any apps are especially recommended in the ham community. Thanks. Dave WA6TXU.