Comparison

KireiCycle 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

KireiCycle

Features
Read full description

Kireicycle is a self-care journal for tracking daily skin, hair, nail, and mood conditions and reviewing your personal rhythm over time. Main features: - Daily phase logging - 5-point skin, hair, nail, and mood notes - Monthly calendar review - Monthly condition averages - 16 phase-based self-care tips - A post-log card that helps you revisit today's tip - Four phase-based three-step self-care paths Kireicycle Pro (auto-renewable subscription): - Weekly and yearly plans - All 16 self-care tips, four self-care paths, monthly review, and condition averages. - Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. - You can manage or cancel subscriptions in Settings > Apple ID > Subscriptions. Privacy Policy: https://starcrown.co.jp/privacy Terms: https://starcrown.co.jp/legal Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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

KireiCycle3 screens
Cycle Sync4 screens

Verdict

The call

The clearest difference is update cadence: KireiCycle at every 4 days against Cycle Sync's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. KireiCycle sells 2 in-app purchases, starting at $0.99 per 7 days 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

KireiCycle ships an update every 4 days, Cycle Sync fortnightly. The most recent releases landed on October 2, 2026 and September 29, 2026 respectively.

Scorecard1 real difference Ā· 5 level
KireiCycle versus Cycle Sync: the parameters behind the verdict, then further details
ParameterKireiCycleCycle Sync
PriceFreeFree
Update frequencyEvery 4 days — betterFortnightly
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad — better
Requires iOS17.0 — better18.2
Further details — not scored
Size19 MB55 MB
Age rating4+4+
DeveloperStarcrown IncAmit Kairon

In-app purchases

2 purchases

KireiCycle

Subscriptions2
  • Kireicycle Pro 週锍7 Days trial$0.997 Days
  • Kireicycle Pro 幓锍$17.991 Year
3 purchases

Cycle Sync

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

Questions

Is KireiCycle free?
KireiCycle 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 KireiCycle or Cycle Sync have ads?
Neither KireiCycle nor Cycle Sync shows ads.
Which is updated more often, KireiCycle or Cycle Sync?
KireiCycle ships an update every 4 days, and Cycle Sync fortnightly. Most recently, KireiCycle was updated on October 2, 2026 and Cycle Sync on September 29, 2026.

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