I’m prolife and I don’t support contraception.
Just an FYI, outside of Catholic circles, NFP is considered contraception/birth control if you’re TTA. A more Catholic way to understand it is that abstinence is the only morally legitimate means of preventing pregnancy. With NFP fertility charting, couples can know what days they’re most likely to get pregnant. In Catholicism, only abstinence during the fertile time is permitted to avoid. If you used barriers or withdrawl during that time, then you’d confess it as "I engaged in a form of contraception during my fertile time X times. This is different from confessing contraceptive methods like the IUD or the pill because you’re not doing something during the act to render it infertile but doing something in preparation to the act to render it infertile.
Since abstinence is the only moral means of pregnancy prevention, the only variety of things you have are charting methods. Some are taught by official programs approved by the Catholic Church. Others aren’t because the organizations encourage contraception during the fertile time in addition to abstinence.
These methods include
Sympto-thermal method
Billings Ovulation Method
Creighton Fertility Care System
Marquette Method
FEMM - approved in some diocese but is still pretty new. Some places list it as a form of the Ovulation method, but it lets you record BBT and OPKs
Two-Day Method - This is mostly promoted in developing nations and is not on the USCCB approved list because they advocate abstinence or other methods during the fertile time. The method effectiveness isn’t as good as the other methods.
Standard Days Method (Cycle Beads) - This again is promoted mostly in developing nations. Women have to have cycles within the specified length range.
LadyComp - Not promoted by the Catholic Church
Daysy- Very similar to Ladycomp
Natural Cycles - The first method that the medical associations are approving, but the Church doesn’t promote it
In addition, there are devices that help make recording basal body temp a little easier. These cannot be used alone. They must be incorporated into the STM. These include:
TempDrop- Promotes itself to NFP couples. Limited research
Ovusense - This one is only promoted by the organization for couples TTA, but I see no reason why NFP couples can’t use it
Ava Bracelett - It’s basically a fertility fitbit. It records more than your temp. The app does predict fertility but it takes a few cycles for it to become accurate and they haven’t done the research to market it as birth control. So it’s primarily marketed to those TTC and then in fine print it says it can compliment NFP. Basically, don’t rely on the bracelet alone.
Good apps
Fertility Friend (STM)
FEMM
Natural Cycles
Kindara
Fertility P(name removed by moderator)oint
Billings Mentor
NFP Charting
Sympto org
Symptopro (not sure if they have an app or are just web-based)