Comparison

Harmonic 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

Harmonic

This app helps prevent burnout by tracking work patterns and encouraging recovery. It provides personalized insights and assessments to build sustainable habits for better mental health and work-life balance.

Highlights
  • Daily work check-ins
  • Burnout risk assessment
  • Recovery activity scheduling
  • AI-powered smart insights
  • Weekly reflection summaries
  • Work-life awareness tracking
Features
Read full description

Harmonic — Burnout Prevention & Wellbeing Burnout doesn’t happen overnight. It builds slowly. One skipped break, one late night, one “I’ll rest later” at a time. Harmonic helps you catch the warning signs early and build sustainable habits that protect your mental health. * Daily Check-Ins Input your work schedule and check in when you've finished for the day! Harmonic will automatically register overtime and nudge when you're going over your scheduled time. * Burnout Risk Score Get a personalized burnout risk assessment based on your check-ins, work patterns, and recovery habits. Watch your score improve as you build healthier routines. * Recovery Blocks Schedule recovery activities that actually recharge you — whether it's a morning walk, reading, time with friends, or simply rest. Set reminders and track your progress. * Smart Insights Receive personalized Recovery suggestions based on the time of day and other metrics via Apple's Foundational Models (AI). * Weekly Reflections Review your week, celebrate wins, and identify what needs attention. Small adjustments lead to lasting change. * Work-Life Awareness Set your work schedule and track time off. Harmonic factors in holidays and PTO to give you a complete picture of your balance.

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. RULES, NOT GUESSWORK. 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. EVERYTHING IN ONE SUBSCRIPTION An active CycleSync Pro subscription unlocks the whole planner: • Cycle logging, phase prediction and a 14-day cycle outlook • Dashboard with today's phase and a 7-day week view • Calendar sync with Apple Calendar and Google Calendar • Conflict detection and unlimited reschedule suggestions • One-tap rescheduling with a 10-second undo • Five notification types: reschedule alerts, phase transitions, period predictions, tomorrow's preview and re-engagement nudges • Insights: energy curve, seasonal capacities and full cycle history • Cycle import from Apple Health • Export your cycle history as JSON or CSV • Light, Dark and System themes BEFORE YOU SUBSCRIBE Onboarding and the plan comparison are free, so you can see how CycleSync works before you pay. The planner opens once your subscription is active, and everything you have already logged stays on your device. Weekly, monthly and yearly plans are available in the app. 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

Harmonic4 screens
Cycle Sync4 screens

Verdict

The call

The clearest difference is ads: Harmonic at none against Cycle Sync's shown. Cycle Sync's advantage is iOS requirement (18.2 vs 26.2). On price, update cadence, 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. Harmonic sells 3 one-off in-app purchases 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

Harmonic ships an update every 3 weeks, Cycle Sync fortnightly. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

Scorecard2 real differences · 7 level
Harmonic versus Cycle Sync: the parameters behind the verdict, then further details
ParameterHarmonicCycle Sync
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 weeksFortnightly — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad — better
Requires iOS26.218.2 — better
Further details — not scored
Size4 MB82 MB
Age rating4+4+
DeveloperSunand KrishnanAmit Kairon

In-app purchases

3 purchases

Harmonic

One-time3
  • Small Tip$1.99
  • Medium Tip$4.99
  • Large Tip$9.99
3 purchases

Cycle Sync

Subscriptions3
  • CycleSync Pro — Weekly3 Days trial$4.997 Days
  • CycleSync Pro7 Days trial$9.991 Month
  • CycleSync Pro14 Days trial$59.991 Year

Questions

Is Harmonic free?
Harmonic 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 Harmonic or Cycle Sync have ads?
Cycle Sync shows ads; Harmonic does not.
Which is updated more often, Harmonic or Cycle Sync?
Harmonic ships an update every 3 weeks, and Cycle Sync fortnightly. Most recently, Harmonic was updated on October 31, 2026 and Cycle Sync on November 5, 2026.

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