This is a phone ring holder that's Magsafe compatible. Theoretically.

I haven't been able to test it yet as I don't have the required magnets. I've also not yet managed to print a version that snaps shut as intended without anything breaking. This is very much a work in progress, and all feedback is appreciated!

The idea: Phone ring holders are expensive, especially Magsafe-compatible ones. But theoretically, Apple's Magsafe technology is "just" a magnet ring. Anything magnetic sticks to it. So why not use that to our advantage? Using magnets in 3d printing is nothing new, and hinges have been a classical print-in-place 3d printing feature!

This design is supposed to work by using 24 3x1mm magnets, for which there are symmetrical holes in the base ring. Depending on the used magnets' strength, with the distance the magnets will have to the phone, the holding strength should be somewhere between 1000 and 350g. Apple recommends 650-900g.

After the magnets are placed, carefully pull the cap over the ring by bending the four individual sections to the side. The cap is technically not needed, but it looks much nicer and makes the whole construction more secure.

Once you're done, please test how much and which kind of force the ring can take before actually using it. Phones are expensive; don't entrust its integrity to a hobbyist's amateur design and 3d-printed material. I also recommend not leaving the gadget on the phone if you're not specifically using it, at least until it has proven itself reliable to you.

Disclaimer: This design is not in any way affiliated with, supported or approved by Apple; no money is being made with it, and it does NOT abide by Apple's Accessory Guidelines. No magnetic shielding is provided, and no other Magsafe Accessory or inductive charging shall be used while using this gadget. The phone and the accessory could be seriously damaged.