Sync vs Cycle
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Privacy-focused design
- Local data storage
- Ad-free experience
- Simple interface
- Cycle tracking
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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.
Cycle
This app helps you track your menstrual cycle, contraception, and pregnancy with a modern interface. It offers symptom logging, partner sharing with supportive gestures, and PDF export for medical records. Prioritizing privacy, it uses iCloud sync and Face ID lock.
- Cycle tracking with animated dashboard
- Home screen widgets for quick glance
- Contraception reminders and pack tracking
- Week-by-week pregnancy tracker
- Symptom logging for pain, mood, energy
- Partner sharing with contextual notifications
- PDF export for doctor visits
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Cycle is the period tracker designed for real life - for you, and for the people you trust CYCLE TRACKING Track your period with a modern, animated dashboard. See your cycle day, phase, fertile window, and next period at a glance. HOME SCREEN WIDGETS Glance at your cycle day, phase, and days until your next period right from your home screen - no need to open the app. CONTRACEPTION Never miss a pill. Supports Combined Pill, Mini Pill, Ring, Patch, Injection, IUD, and Implant. Daily reminders, pack tracking, adherence history, and a calendar view to look up any past day. PREGNANCY TRACKER Follow your pregnancy week by week with stunning visuals and baby development milestones. From first trimester through birth. POSTPARTUM Guided postpartum recovery. Log your first period when it returns to resume cycle tracking. SYMPTOM LOGGING Log pain, mood, energy, and flow in seconds. Track multiple symptoms per day and spot patterns over time. PARTNER SHARING Share your cycle on your terms. Your partner gets their own dashboard with contextual notifications. Choose how much to share - just your mood, your phase, or full details. PARTNER PULSE - GESTURES Send and receive small gestures of support throughout the day: "thinking of you," "proud of you," "love you," and more. A quiet way to stay connected without saying a word. PARTNER NOTIFICATIONS Four notification styles: Caring, Informational, Playful, or Minimal. Each adapts the language so it feels right. PDF EXPORT Export a clean PDF of your cycle history to share with your doctor or keep for your records. PRIVACY FIRST iCloud sync only - your data is never stored on our servers. Face ID app lock. Discreet notification mode. ALSO INCLUDES - Apple Health integration - Smart reminders for periods, pills, and appointments - Detailed or discreet notification styles - Automatic iCloud backup and self-healing sync Download Cycle and take control of your health - beautifully, privately, and together. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://mladjan.net/cycle-privacy-policy
Screenshots
Verdict
The clearest difference is in-app purchases: Sync at none against Cycle's 4. Sync also leads on iOS requirement (15.1 vs 18.0). Cycle's advantage is update cadence (every 2 days vs every 3 weeks). On price, rating, review sentiment and ratings volume 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
Both are free to download. Cycle sells 4 in-app purchases, starting at $3.99 per month. Sync asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Sync against 5.0 for Cycle. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Sync ships an update every 3 weeks, Cycle every 2 days. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.
| Parameter | Sync | Cycle |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 3 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 18.0 |
| Further details — not scored | ||
| Size | 41 MB | 108 MB |
| Age rating | 12+ | 4+ |
| Developer | Wei Jian Wong | Imperio |
Customer experience
Sync
Cycle
In-app purchases
Sync
No in-app purchases
Cycle
- Cycle Pro7 Days trial$3.991 Month
- Cycle Pro7 Days trial$24.991 Year
- Unlimited Partners$4.99
- Cycle Pro — Lifetime$39.99









