Should I get a DSLR camera or Get a lens for my iPhone 6?

I have an iPhone 6 and all my photography is done via my phone.

My birthday is coming up and I was wondering if I should rather get a DSLR or if buying a macro for my phone would be better.

What do you recommend?

Depends on you and how interested you are in photography or quality images.

This is the Photography category and the contributors that populate here are kinda serious about Photography and are interested in quality images (properly composed and exposed, interesting shots).

If you are happy with the performance from the iPhone then fair enough go in that direction (there are websites dedicated to iPhonePhotography) so you aren't alone, just don't expect many people that are seriously into Photography to encourage you.

The DSLR is without a doubt the better tool, BUT there's a learning curve and you need to put effort into learning how to approach a subject, compose the shot and understand how to set the camera to get the effect you might want, this isn't difficult if you are genuinely interested in photography, BUT if all you want is a device that's quick and easy to point and shoot then stay with the iPhone.

Have a look for digital camera buying guides online and then decide

If it is true that "all my photography is done via my phone." then buying a bulky DSLR and hauling it around is stupid. But even more stupid is the idea that a $100-150 lens for an iPhone 6 somehow can be balanced against a $600-2500 DSLR for features and quality. But if you don't have your DSLR with you and do have your phone, then the choice will be moot.

Depends if you're interested in photography or just random snapshots.

I would get the dslr, but thats just me

Agree with what's been written so far. It does depend upon your interest, but also what you plan on doing with the files. No iPhone with any kind of accessory lens is going to be able to produce an image like a real camera with a real macro lens. You don't have the control over the exposure or focusing with a smartphone. It's the control that allows you to get the shot the way you want to get it.

However, if you are just taking pictures of flowers or other common cliche type photos, and just posting them onto social media, then using smartphone with a lens converter would work too. But if you need to make prints, shoot in less than ideal shooting conditions (which often produces the most dynamic, dramatic and interesting light), then a smartphone is going to be useless.

Any DSLR with a kit lens will allow you to get acceptable macro shots. If you need to photograph smaller objects, then either an extension tube (cheap < $100) or a true macro lens (not cheap at about $500 - $1,500) will do the job very well.

The problem with macro work is that it is specialized and challenging. Not only for you, but challenging for the gear too. You're going to find that macro shots will always have a very shallow depth of field (area that's in focus = depth of field). So, in order to get what you want in focus, you'll need to use smaller apertures which means you need a camera with that kind of control which isn't found on smartphones. You'll also find that your exposures are going to be very long requiring a good tripod. Again, not readily available for smartphones.

Macro shots are difficult, but not so difficult that you need a specialized DSLR. Any DSLR will be able to be used very effectively in macro work. Having an articulated LCD screen is extremely useful and I wouldn't recommend a camera without one. You'll also need a decent tripod that has legs which can be moved and locked independently. Manfrotto, Gitzo, and Really Right Stuff makes the best. Indurro is cheaper but still decent stuff too. Just stay away from plastic tripods or those by brands which don't make tripods such as Nikon, Sunpak, Polaroid, etc…