Period Tracker vs Full Moon Flow
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Period Tracker
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PREMIUM ā PURCHASE REQUIRED: All features described below are part of Pro and require a purchase: a weekly or yearly auto-renewing subscription, or a one-time lifetime purchase. Mark the days you bleed on a clean calendar and CycleLog shows when your next period is likely due ā with no account, no cloud, and no one else ever seeing a single entry. Most period apps want your email, your consent to analytics, and your cycle history on their servers. CycleLog is the opposite: every entry is stored on your iPhone only. There is no sign-up, no sync, no ad SDK, and nothing is sent anywhere. Turn on the Face ID lock and even someone holding your unlocked phone sees nothing. WHAT YOU GET ⢠Open the app to "Day 14" and "Around Sep 2, about 6 days away" ā no counting backwards through a paper calendar ⢠A month view where logging a day takes one tap: period, spotting, cramps, mood swings, fatigue, or a short note ⢠An estimate that stays honest ā it tells you how many of your own logged cycles it is built on, and says so plainly when your logging lapses instead of pretending ⢠A reminder up to 3 days before your estimated date, with discreet wording so your lock screen never shows the word "period" ⢠Charts of how often each symptom appears and how much your cycles vary ā drawn only from what you logged ⢠Your whole history exported as a CSV you can hand to a clinician, and a delete-all button that actually deletes PERFECT FOR ⢠Anyone who wants period dates written down without handing them to an ad-funded platform ⢠Anyone who needs the app itself to stay discreet ā Face ID or passcode lock, neutral notification wording ⢠Irregular loggers: a missed month never corrupts your record, the estimate simply picks up at your next entry ⢠Anyone whose doctor has asked "when was your last period?" one time too many WHY NOT JUST USE THE BIG-NAME TRACKERS? The famous apps are built around accounts and data. Your cycle history sits on their servers, subject to their policies and their breaches. CycleLog has no server to breach: entries never leave your iPhone, and the app works entirely offline. Its dates are estimates from the days you logged ā not medical advice and not a diagnosis. Anything that worries you belongs with a clinician, and the app says exactly that. PRIVATE BY DEFAULT No account. No cloud. No analytics or ad SDKs. An optional Face ID / passcode lock guards the app, reminders can use neutral wording, and export and deletion are built in ā your record belongs to you, on your device, full stop. PREMIUM (PURCHASE REQUIRED) CycleLog Pro unlocks symptom pattern analysis: which day of your cycle each symptom usually lands on, worked out from your own log. Choose the weekly or yearly subscription, or a one-time lifetime purchase. Logging, the calendar, your estimate, reminders, export, and deletion all work without Pro. Log today before you put your phone down ā your next-period estimate begins with the very first entry. Terms of Use: https://leanstudio.asia/terms-of-use Privacy Policy: https://leanstudio.asia/privacy-policy Support: support@leanstudio.asia
Full Moon Flow
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Your cycle, your data, your device. Full Moon Flow is a simple, private period tracker that keeps all your data on your device. No accounts, no cloud sync, no tracking. Just open the app, tap a day, and log your flow. What it does: ⢠Log your daily flow intensity (spotting, light, medium, heavy) on a clean monthly calendar ⢠Log your mood if desired, track patterns over time to see how your cycle affects your mood. ⢠See your cycle history at a glance- period duration and cycle length for each past cycle ⢠View averages and trends- know your typical cycle length and how it's changing over time ⢠Get a gentle estimate of when your next period might start, based on your own history ⢠Export your data as a CSV file anytime. It's your data, you control it. What it doesn't do: ⢠No accounts to create ⢠No data sent to any server ever ⢠No ads, no analytics, no tracking ⢠No fertility or ovulation predictions ⢠No notifications (yet) Privacy first. Full Moon Flow was designed from the ground up to keep your menstrual health data completely private. Everything is stored locally on your device in an encrypted database. Nothing is transmitted over the internet. When you delete the app, your data is gone, because it was never anywhere else. Simple by design. No cluttered dashboards, no gamification, no social features. Just a calm, clean interface that helps you understand your cycle without the noise.
Screenshots
Verdict
The clearest difference is update cadence: Full Moon Flow at every 9 days against Period Tracker's every 4 months. 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Period Tracker ships an update every 4 months, Full Moon Flow every 9 days. The most recent releases landed on October 12, 2026 and October 8, 2026 respectively.
| Parameter | Period Tracker | Full Moon Flow |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 9 days ā better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad ā better |
| Requires iOS | 17.0 | 16.4 ā better |
| Further details ā not scored | ||
| Size | 3 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | LEAN ASIA CO., LTD | Daniel Delellis |
In-app purchases
Period Tracker
No in-app purchases
Full Moon Flow
No in-app purchases









