Hello everyone

Please forgive what is probably a very basic question. I'm an amateur vegetable gardener and I'd like to have the capacity to record voice memos, tag them, and then retrieve them by speaking the tag into speech recognition software.

 For example I might record a memo which records what I need to plant in May. I would then speak 'Plant May' into the software and it would automatically retrive and replay the relevant memo. 

Is there any software which enables me to do this. Ideally I would like to use it on my iPhone, but my PC would do. I have the most basic Dragon dictation software on my iPhone which I find reasonably easy to use, but it doesn't have this sort of save and retrieve capacity.

 Thanks in advance for your help.

Chris