Looking at the list of contraception available to women in the UK, it seems like there are loads of choices. Several varieties of both the single hormone or dual hormone pill, the patch, the injection, the hormonal or non-hormonal coil, the implant, male or female condoms, the diaphragm. But should you have migraines, or experience side-effects from hormonal contraceptive use, have a latex allergy, be reluctant or unable to go through an uncomfortable (at best) copper coil insertion, the list gets a lot shorter very quickly. This is where contraceptive apps like Natural Cycles come in.