DSLR or IPhone with macro attachment?

Hi, I am a complete novice when it comes to photography but would like to be able to take good close up shots of my watch collection. A friend of mine has given me his Nikon D3300 to play around with. It comes with an 18-105mm lens but no macro.

I'm not sure whether to buy this combo from him and in addition purchase a macro lens and tripod, or buy one of the macro lens attachments you can attach to an iPhone.

I'd only really use the camera for watch shots and cannot imagine getting seriously into photography.

Can anyone please recommend a macro lens to go with the above camera within say £100 (is that even possible?!)

If I go for a phone lens, can they still be used if my phone is upgraded or will I have to buy a new one each time I upgrade. I believe I could buy something decent for less than £100.

I have been reading various posts on this forum and that has been very helpful but would be very grateful for any advice from the knowledgeable OF members.

Thanks!

Setting up the shot is more important than the gear. Lighting in particular.

Thanks, it does have a macro setting which I had a look at yesterday. I will give it a try with the inexpensive light box I received at Christmas.

Thanks, This is what I am thinking of buying rather than the more expensive DSLR option. Still looking at both options though as I have a few weeks to play around with the Nikon.

As a slight aside, there are many mirrorless options these days that are fantastic. I used to be a hardcore dSLR user but I actually prefer mirrorless interchangeable lens cameras.

Guess it depends on how the pic taken is being used....a lot of sites compress images to a much smaller image so doesn't it impact the quality again. When using ebay I would use my phone with a macro lens, but for personal use or emailing an image of a watch I have for sale, a dlsr would be preferable.7