Is there a period tracker that tracks prayer and fasting?

Yes, but only if it does more than mark a date. For a Muslim woman, a tracker that tracks prayer and fasting should do three things: pause your prayers the moment hayd begins, count the fasts you owe and nothing else, and never add the prayers you left to that count, because they are not owed.

That last point is where generic apps and some "Islamic" ones go wrong. The hadith of 'Aishah (may Allah be pleased with her) settles it: "When that would happen to us, we were ordered to make up the fasts, and we were not ordered to make up the prayers." (Narrated by al-Bukhari.) So the two columns a tracker needs are different from each other:

• Prayer: excused, not owed. While hayd or nifas lasts, prayer is not required of you, and the prayers you leave are not made up afterward. A tracker should simply mark those days as excused and show when ghusl brings you back to prayer, rather than building a backlog you will never owe. The one edge case, a period that starts or ends right at a prayer's time, is where the schools differ; see which prayer you owe when your period ends for each school's position, and ask that your app lets you choose the school you follow.
• Fasting: a debt that adds up. Allah says of the fasts missed to a valid excuse: "the same number of other days" (Al-Baqarah 2:185), and the missed days of hayd are made up before the next Ramadan; see how to make up fasts missed to your period. A tracker should log each missed day as it happens, because a count rebuilt from memory in Sha'ban is the one most likely to be wrong.
• The day it changes is the hard part. Whether a day of bleeding counts at all depends on the moment it starts or stops, which is why a date alone is not enough; see what to do if your period starts during a Ramadan fast and what to do if it ends during the day. Bleeding that is not hayd does not stop a fast either, so a useful tracker has to help you tell istihadah from hayd instead of treating every spot of blood the same.

Here is a short test for any app you are considering:

• Does it show prayer and fasting separately? If it lumps "missed worship" into one number, it is probably counting prayers you do not owe.
• Can you set your madhab? Where the schools genuinely differ, a tracker that applies one rule to everyone is making the choice for you.
• Does it keep a running fast count that carries across Ramadans? Fasts can be owed from more than one year.
• Does it avoid selling or sharing what you log? A record of your bleeding next to a record of when you prayed and fasted says more about you than either alone. In 2023 the U.S. Federal Trade Commission ordered the maker of the Premom app to stop sharing users' health data with advertisers without consent. Our answer on the best period tracker for privacy covers what to check.

Tracking is worth doing for your body too, not only your worship. The American College of Obstetricians and Gynecologists recommends treating your cycle as a vital sign, and the NHS names a record in an app or diary as the practical way to tell whether your periods are actually irregular. If you are weighing several apps side by side, what to look for in a period tracker built for Muslim women is the fuller checklist, and the best period tracker for Ramadan covers the month itself.

Nisaa was built around this split. It names your state as hayd, istihadah, nifas or tahara using the position of the madhab you choose, treats prayer days as excused rather than owed, and keeps a running total of the fasts you still owe. It does not sell what you log, and it is free on the App Store.

Whether the app also shows ads or needs an account is a separate check; see a period tracker with no ads and no account.

Once you know what to count, how to count your missed Ramadan fasts shows the arithmetic with a worked example.