Comparison

Flow Fasting Tracker vs Cycluna

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

Head to head
About

Flow Fasting Tracker

Read full description

Your cycle changes everything. Most fasting apps ignore it. Estrogen, progesterone and testosterone each shift your metabolism, energy and hunger differently across your cycle. Flow Fasting tracks where you are and guides your fasting practice around it, so you always know the right window for your phase, and why it works. Whether you struggle to fast during your luteal phase, feel unstoppable in follicular, or want to understand why your results change week to week - Flow Fasting gives you a science-backed approach for every phase of your cycle. FIVE PHASES. FIVE DIFFERENT FASTING STRATEGIES. Bleed: Rest and restore. Shorter windows, nourishing breaks. Follicular: Your peak window. Longer fasts, stronger results. Ovulatory: High energy. Maintain momentum and protect your gains. Early Luteal: Shift with your hormones. Moderate and consistent. Late Luteal: Listen to your body. Gentle windows, no force. WHAT'S INSIDE: Phase-synced fasting windows Fasting recommendations that adapt to your cycle every day. Built around your phase, your goals and your rhythm. Fasting timer A clean, focused timer with real-time milestone markers at 14, 16 and 24 hours. Know exactly where you are in your fast and what your body is doing. Cycle insights Charts that connect your fasts, weight and steps over time. Spot your patterns, track your progress and understand how your cycle shapes your results. Daily log Track weight, steps, symptoms, energy, mood and sleep every day. Watch your insights build as your data grows. Sync your steps from Apple Health with one tap. Toggle it on in Settings to see your activity alongside your fasting and cycle date. Phase nutrition guide What to eat in every phase of your cycle. Food directly affects how well you fast - Flow Fasting connects the two. By phase comparison See how your energy, mood, sleep and fasting performance compare across all five phases. Built from your own data over time. Week planner Plan your fasting windows ahead. Map your cycle, set your intentions and remove the daily guesswork. Science guide The research behind cycle-synced fasting. Hormones, metabolism, autophagy, cortisol and more - all explained through a cycle lens. START FREE: Try Flow Fasting free for 7 days with annual plan. Full access. After your trial, you will be charged $39.99 unless cancelled before the trial ends. Monthly plan available at $7.99 per month, billed immediately. Cancel anytime in App Store settings. For wellness purposes only. Not medical advice. Terms of use: https://flowfasting.com/terms-of-service/

About

Cycluna

Features
Read full description

Cycluna is a period and cycle tracker that keeps everything on your iPhone. No account. No sign-up. No data leaving your device, because there is nowhere for it to go. Know where you are Your cycle day, your phase, your fertile window, and when your next period is likely to arrive. One look and you know. A calendar that knows your rhythm Period days and fertile days marked across the month, so planning ahead doesn't take math. What your body is actually doing Each phase explained in plain language, with a hormone reference chart showing how oestrogen, progesterone, LH and FSH move through a typical cycle. A journal that's actually private Moods, headaches, and anything you want to write down. Lock it behind Face ID if you like. Patterns, only when they're real Cycluna looks at your mood and headache logs across your days, your cycle phases, and the lunar month. It only names a pattern when there is enough data to support one β€” and says so plainly when there isn't. No invented insights. The moon, every night Tonight's moon phase, the nights ahead, and how your own logs sit across the lunar month. Research has not established a moon–mood link, and Cycluna does not pretend otherwise β€” this lens describes your logs and nothing more. Reminders before it matters A gentle nudge before your period or ovulation, scheduled by your own phone. Turn them off and they're gone. Yours to take with you Export your data whenever you want. Delete it and it's gone from the device for good β€” there is no copy anywhere else, because we never had one.

Screenshots

Flow Fasting Tracker4 screens
Cycluna3 screens

Verdict

The call

The clearest difference is in-app purchases: Cycluna at none against Flow Fasting Tracker's 2. Flow Fasting Tracker's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, update cadence and ads there is nothing between them.

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

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

Both are free to download. Flow Fasting Tracker sells 2 in-app purchases, starting at $7.99 per month. Cycluna asks for nothing beyond the download.

UpkeepUpdate frequency

Flow Fasting Tracker ships an update every 10 days, Cycluna weekly. Both last shipped on September 28, 2026.

Scorecard3 real differences Β· 3 level
Flow Fasting Tracker versus Cycluna: the parameters behind the verdict, then further details
ParameterFlow Fasting TrackerCycluna
PriceFreeFree
Update frequencyEvery 10 daysWeekly β€” better
AdsNoNo
In-app purchasesYesNo β€” better
DevicesiPhone, iPad, iPod β€” betteriPhone
Requires iOS13.0 β€” better17.0
Further details β€” not scored
Size16 MB6 MB
Age rating4+4+
DeveloperKristina KozicynaiteSeema Jagadeesh

In-app purchases

2 purchases

Flow Fasting Tracker

Subscriptions2
  • Monthly$7.991 Month
  • Annual7 Days trial$39.991 Year
None

Cycluna

No in-app purchases

Questions

Is Flow Fasting Tracker free?
Flow Fasting Tracker is free to download, with in-app purchases available.
Is Cycluna free?
Cycluna is free to download, with no in-app purchases.
Do Flow Fasting Tracker or Cycluna have ads?
Neither Flow Fasting Tracker nor Cycluna shows ads.
Which is updated more often, Flow Fasting Tracker or Cycluna?
Flow Fasting Tracker ships an update every 10 days, and Cycluna weekly. Most recently, Flow Fasting Tracker was updated on September 28, 2026 and Cycluna on September 28, 2026.

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