Comparison

Period Tracker ⋆ vs Sync

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

Head to head
About

Period Tracker ⋆

This app helps you track your menstrual cycle, predict periods, and monitor ovulation. Log symptoms, moods, and intimate life for personalized insights and receive timely reminders. It offers customizable tracking for irregular cycles and provides fertility period notifications.

Highlights
  • Cycle and menstruation forecasting
  • Menses date tracking
  • Customizable cycle length
  • Mood and symptom logging
  • Intimate life tracking
  • Fertility and menses notifications
Features
Read full description

CYCLE & PERIOD TRACKER! Meet a completely new approach to tracking your cycle. Everyday tips, opportunity to send REMINDERS about the beginning of cycle, pms, ovulation. In PERIOD TRACKER, you will find multiple capabilities: * Forecasting your cycles and menstruation periods * Tracking your menses dates * Customizing individual menses duration, the length of cycle for irregular menses * Including specific moods and symptoms * Tracking your intimate life * Notifications for fertility periods and menses You can log your symptoms, including the intensity of secretions and your mood. A personal card in the profile will let you know the date of the beginning of cycle. Period Calendar is used for recording and forecasting your period, fertile, and ovulation days. Note: Due to individual differences, such as menses cycle, regularity of periods, etc., Period Calendar might not always forecast accurately. Therefore, it can be used for tracking your personal data, but not as the only method of unwanted pregnancy prevention. Pricing and subscription terms: Automatically renewable monthly subscription: $4,99 (billed monthly) Payment will be charged from the credit or debit card associated with your iTunes account when you confirm the initial subscription purchase. Subscriptions renew automatically unless auto-renewal is turned off at least 24 hours before the end of the current subscription period. Your account will be charged a renewal fee 24 hours before the end of the current period, the renewal fee will be listed. You can manage your subscription and turn off the auto-renewal in your account settings after the purchase. Any unused part of the free trial period will be canceled when you purchase your subscription, if applicable. Learn more about our terms and conditions here: Terms of Use: http://myperiodtracker.net/terms_of_use Privacy Policy: http://myperiodtracker.net/privacy_policy

About

Sync

A privacy-focused period tracker that stores all your data locally on your device. It offers a simple and ad-free experience for managing your menstrual cycle.

Highlights
  • Privacy-focused design
  • Local data storage
  • Ad-free experience
  • Simple interface
  • Cycle tracking
Features
Read full description

Sync Period tracks cycles locally and supports private sharing with a partner or friend. Log periods, symptoms, moods, and notes; view your calendar and pattern summaries; set optional reminders; and import supported Flo, Clue, Drip, or generic CSV data after reviewing what Sync can recognize. Your cycle history is encrypted on your device. Private predictions adapt to your recent cycle history and confirmed corrections entirely on your device. Sync shows a likely-start window and confidence level, learns recurring pre-period patterns, and can use an enabled BBT signal or positive ovulation test without uploading those health details. Predictions become more cautious when history is sparse or variable. Partner sharing is optional and off by default. You choose which supported cycle details to share. Updates are end-to-end encrypted and require the complete private invite to open. Each encrypted relay update expires after no more than 30 days; active sharing renews that rolling expiration when a new update is published. Recent physical symptoms and flow, sex-drive and intimacy check-ins, and moods are three separate opt-ins that can each be turned off again. Intimate sharing is off by default and never indicates consent. Discharge, medications, written notes, and other sexual details remain private. Sync Period has no ads, no behavioral analytics SDKs, and no required account. You can export a private backup or permanently delete local app data at any time. Cycle predictions and pattern summaries are estimates. Sync Period does not provide diagnosis, contraception, or medical advice.

Screenshots

Period Tracker ⋆3 screens
Sync4 screens

Verdict

The call

The clearest difference is in-app purchases: Sync at none against Period Tracker ⋆'s 1. Sync also leads on ads (none vs shown) and review sentiment (100% vs 75%). Period Tracker ⋆'s advantage is ratings volume (23K vs 1) and iOS requirement (13.0 vs 15.1). On price 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. Period Tracker ⋆ sells 1 in-app purchase, starting at $4.99 per month. Sync asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sync holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Period Tracker ⋆ has 23K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 75% of Period Tracker ⋆'s written reviews are positive against 100% of Sync's.

UpkeepUpdate frequency

Period Tracker ⋆ ships an update every 2 months, Sync every 3 weeks. The most recent releases landed on September 25, 2026 and September 2, 2026 respectively.

Scorecard8 real differences · 2 level
Period Tracker ⋆ versus Sync: the parameters behind the verdict, then further details
ParameterPeriod Tracker ⋆Sync
PriceFreeFree
Rating4.7 (23K ratings)5.0 (1 ratings) — better
Positive reviews75.2% of reviews100.0% of reviews — better
Number of ratings23K — better1
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.0 — better15.1
Further details — not scored
Size122 MB41 MB
Age rating4+12+
DeveloperLUCKY LABS LPWei Jian Wong

Customer experience

Period Tracker ⋆

All ratings18,224 ratings
Positive93.9%
Neutral4.2%
Negative1.9%
Written reviews475 reviews
Positive75.2%
Neutral8.0%
Negative16.8%

Sync

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Period Tracker ⋆

Reported bugs

2 issues
  • Automatically adds period dates even when none
  • Inaccurate predictions for irregular cycles

Requested features

4 requests
  • Add more symptom tracking options
  • Allow manual adjustment of period dates
  • Improve navigation to view past cycles
  • Provide more customization options

Sync

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Period Tracker ⋆

Subscriptions1
  • Premium$4.991 Month
None

Sync

No in-app purchases

Questions

Is Period Tracker ⋆ free?
Period Tracker ⋆ is free to download, with in-app purchases available.
Is Sync free?
Sync is free to download, with no in-app purchases.
Which has better reviews, Period Tracker ⋆ or Sync?
Sync is rated higher. Period Tracker ⋆ averages 4.7 out of 5 from 23K ratings, while Sync averages 5.0 from 1 ratings.
Do Period Tracker ⋆ or Sync have ads?
Period Tracker ⋆ shows ads; Sync does not.
Which is updated more often, Period Tracker ⋆ or Sync?
Period Tracker ⋆ ships an update every 2 months, and Sync every 3 weeks. Most recently, Period Tracker ⋆ was updated on September 25, 2026 and Sync on September 2, 2026.

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