a private cycle tracker built with fiqh
nafs is a muslim period and ovulation tracker with built-in fiqh guidance for prayer and fasting during your cycle. predictions run entirely on your device, so your data never leaves your phone. you can also export an encrypted PDF for your healthcare provider on nafs+.
most cycle trackers sell your data. one major islamic app was caught doing it last year. nafs was built specifically to solve that. predictions run entirely on your device and never send your symptoms, mood, or cycle dates to a server.
the fiqh layer is built in. when you're on your cycle, prayers and fasts mark themselves excused, and you can read the relevant rulings for each of the four major sunni schools right in the app. if you want to share data with a doctor, you can export an encrypted PDF from nafs+. everything else stays with you.
what's inside
cycle and ovulation tracking
log periods, track cycle length, and see ovulation windows with privacy by default.
on-device predictions
predictions run entirely on your device to forecast your next cycle. nothing leaves your phone.
symptom and mood logging
track symptoms, mood, energy, and pain levels with full encryption.
built-in fiqh guidance
rulings on prayer, fasting, and worship during your cycle, sourced from hanafi, shafi'i, maliki, and hanbali positions.
rest and restore mode
during your cycle, prayers and fasts mark themselves excused so you can rest without guilt.
encrypted medical PDF export
on nafs+, export an encrypted PDF of your cycle data to share with a healthcare provider.
questions
is my cycle data really private?
yes. predictions run entirely on your device. your cycle, symptoms, and notes are AES-256 encrypted and never leave your phone unless you turn on encrypted cloud backup yourself.
does it work for irregular cycles?
yes. the on-device model learns your patterns over time and adapts. you don't need a perfectly regular cycle for it to be useful.
which madhabs does the fiqh layer follow?
all four major sunni schools (hanafi, shafi'i, maliki, hanbali) are represented for rulings around menstruation, prayer, and fasting.