Comparison

CyclePrivate vs Cycle Sync

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CyclePrivate

Features
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Your cycle is personal. CyclePrivate keeps it that way. Built for women who want powerful cycle tracking without sacrificing privacy. No account. No signup. No login. Just open the app and start tracking immediately. PRIVATE BY DESIGN - All data stored securely and locally on your device - Face ID, Touch ID, and PIN lock protection - No account, email, or login required, ever - 100% ad-free, no data sharing, no trackers FREE CYCLE TRACKING FEATURES - Log period start and end dates in one tap - Accurate period predictions based on your cycle history - Ovulation day and fertile window calculation - Visual calendar showing past and upcoming cycles - Daily logging for basic moods and standard symptoms (cramps, bloating, fatigue, headache, etc.) - Smart local reminders (notifies you before your next period begins) CYCLEPRIVATE PREMIUM: UNLOCK DEEPER INSIGHTS Upgrade to CyclePrivate Premium to unlock advanced tools and customization to better understand your body: 1. UNLIMITED CUSTOM SYMPTOMS & TAGS Personalize your tracking! Create and log custom tags for unique symptoms, moods, medications, workouts, or notes that matter to you. 2. ADVANCED CHARTS & TREND ANALYSIS Go beyond basic tracking. Get detailed visual charts showing cycle length trends, mood patterns over time, and average cycle analytics to understand your health patterns. 3. DOCTOR-READY PDF HEALTH REPORTS Export your complete cycle, symptom, and mood history into a clean, professional PDF report. Share it directly with your doctor during visits. 4. PRIVATE PARTNER SYNCHRONIZATION Share your cycle phase, fertile window, and mood predictions with your partner securely and privately, keeping them in the loop. YOUR PRIVACY. YOUR CHOICE. We built CyclePrivate with one core belief: Your health data belongs to you. Not to advertisers. Not to cloud servers. Not to anyone else. Everything you log stays on your phone, protected by biometrics and visible only to you. SUBSCRIPTION INFORMATION: CyclePrivate Premium offers two auto-renewing subscription options: - Monthly Premium Access - Yearly Premium Access (Save 50% compared to the monthly plan) Price may vary by location. Subscriptions will be charged to your credit card through your iTunes account. Your subscription will automatically renew unless canceled at least 24 hours before the end of the current period. You can manage your subscriptions in Account Settings after purchase. Terms of Service: https://www.navelosoftware.com/projects/cycle-private/terms-and-conditions Privacy Policy: https://www.navelosoftware.com/projects/cycle-private/privacy-policy Download CyclePrivate today, your most private health companion.

About

Cycle Sync

Features
Read full description

CYCLE-AWARE CALENDAR CycleSync helps professional women align their work schedules with their natural menstrual cycle phases. Instead of fighting through low-energy days, you get smart suggestions to move demanding meetings to days when your focus and energy peak. WORK WITH YOUR RHYTHM, NOT AGAINST IT Your cycle isn't an obstacle. It's a compass. Menstrual Phase (Winter) Rest and recovery. Reschedule high-stakes meetings. Follicular Phase (Spring) Rising energy. Schedule creative work and planning. Ovulation Phase (Summer) Peak performance. Take on negotiations and leadership. Luteal Phase (Autumn) Focused wind-down. Finish projects and organize. SMART RESCHEDULING CycleSync connects to your calendar and automatically detects: • Events on heavy-flow days • Events on rest-phase days • Dense meeting days during focus phases (3+ events) One tap on a conflict card opens the Time Slot Picker. Your available slots on better days are pre-calculated. Reschedule in seconds. An undo option gives you 10 seconds to reverse. NO AI. NO GUESSING. The recommendation engine is rule-based: 1. Your cycle history predicts your phase for any date. 2. Your phase preferences determine focus or rest classifications. 3. Your calendar events are flagged when they conflict with your classifications. 4. Available slots on recommended-phase days enable one-tap rescheduling. WHAT'S FREE • Cycle logging and phase prediction • Calendar sync (Apple Calendar and Google Calendar) • Dashboard with today's phase and a 7-day overview • Basic conflict detection • Five notification types including phase transitions, daily insights, and period predictions • Cycle history for the last three cycles • Focus and rest customization for each phase • Light, Dark, and System themes WHAT'S PRO Unlock everything: • Unlimited reschedule suggestions • One-tap rescheduling with undo • Advanced conflict detection • Unlimited phase history • Priority notifications • Tomorrow's preview alerts • Re-engagement reminders PRIVACY FIRST • All cycle data is stored locally on your device • No cloud sync and no tracking • Health data is read-only from Apple Health • Export your data anytime as JSON or CSV HOW TO START 1. Open CycleSync and log your last period start date. 2. Connect your calendar using Apple Calendar or Google Calendar. 3. Set your typical cycle length (default: 28 days). 4. Review your dashboard. Suggested reschedules appear automatically. Download CycleSync and work with your natural rhythm. By subscribing, you agree to our Terms of Use (EULA): https://cyclesync.tunnxo.com/legal/eula.html Privacy Policy: https://cyclesync.tunnxo.com/legal/privacy.html

Screenshots

CyclePrivate4 screens
Cycle Sync4 screens

Verdict

The call

The clearest difference is update cadence: CyclePrivate at daily against Cycle Sync's fortnightly. CyclePrivate also leads on iOS requirement (15.1 vs 18.2). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CyclePrivate sells 2 in-app purchases, starting at $4.99 per month and Cycle Sync sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

CyclePrivate ships an update daily, Cycle Sync fortnightly. Both last shipped on September 10, 2026.

Scorecard2 real differences · 4 level
CyclePrivate versus Cycle Sync: the parameters behind the verdict, then further details
ParameterCyclePrivateCycle Sync
PriceFreeFree
Update frequencyDaily — betterFortnightly
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better18.2
Further details — not scored
Size50 MB55 MB
Age rating4+4+
DeveloperNavelo SoftwareAmit Kairon

In-app purchases

2 purchases

CyclePrivate

Subscriptions2
  • Premium Monthly Access$4.991 Month
  • Premium Yearly Access$29.991 Year
3 purchases

Cycle Sync

Subscriptions3
  • CycleSync Pro — Weekly$4.997 Days
  • CycleSync Pro$9.991 Month
  • CycleSync Pro$59.991 Year

Questions

Is CyclePrivate free?
CyclePrivate is free to download, with in-app purchases available.
Is Cycle Sync free?
Cycle Sync is free to download, with in-app purchases available.
Do CyclePrivate or Cycle Sync have ads?
Neither CyclePrivate nor Cycle Sync shows ads.
Which is updated more often, CyclePrivate or Cycle Sync?
CyclePrivate ships an update daily, and Cycle Sync fortnightly. Most recently, CyclePrivate was updated on September 10, 2026 and Cycle Sync on September 10, 2026.

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