Originally Posted by
Alty
Actually, taking your basal temperature, keeping track for 6 months, is almost 100%. Also, it will only cost you a thermometer.
The ovulation apps and calendars online, are based on averages, when the average woman ovulates. Many women don't follow that average, which is why the calendars and apps don't work.
As for ovulation kits, I work at a Dollar store, we sell them, and they are just as accurate as any other kit on the market, at a low cost of $1each. They don't have to be expensive.