Comparison

ULA Period Tracker vs Flow State Cycle

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

Head to head
About

ULA Period Tracker

Features
Read full description

Your cycle should not be a product. Keep it yours with ULA. ULA is the period tracker built on one non-negotiable principle: everything stays on your device. No servers. No cloud. Your data belongs only to you, no one, not even us, can see your information. You've seen what happens when others do. Most period tracking apps have become something else entirely, wellness platforms, advertising engines, data brokers dressed in pink. They offer horoscopes, social feeds, and premium subscriptions, while your most sensitive health information quietly becomes their most valuable asset. Some have faced the legal consequences. Their users faced worse. ULA is the opposite of all that. One thing, done right. ULA tracks your cycle. That's it.  No social features. No ads. No upsells. No account required. Just an intelligent, private tool that learns your unique pattern, including considerations for irregularities like PCOS or PMS, and gives you predictions for your period, fertile windows, and ovulation. All on your iPhone. All offline. Track what actually matters: From bleeding intensity to ovulation pain, mood swings to fatigue, ULA gives you the depth to truly understand your body, without broadcasting it to anyone. Log symptoms, sexual activity, and cycle phases with precision. Edit past entries anytime. Your history is yours, no excuses. Nothing hidden. Nothing leaving your phone: ULA's prediction and business logic is open source. Audit it on GitHub. Verify the architecture yourself. We publish our math because we have nothing to hide and because you deserve to know exactly how your data is handled. Not a promise. Proof. ULA Period Tracker: Privacy. Period.

About

Flow State Cycle

This private period tracker logs your cycle with a single tap and uses your data for smart predictions. It offers symptom and mood tracking, cycle insights, and doctor-ready reports. Your health data stays on your device, ensuring complete privacy.

Highlights
  • Smart cycle predictions
  • Symptom and mood logging
  • Cycle insights and patterns
  • Doctor-ready PDF reports
  • Health ecosystem sync
  • CSV data export
  • Dark mode support
Features
Read full description

Flow State is a private, local-first period tracker that keeps your health data on your device — no account required, no cloud, no tracking. Log your period with a single tap. Flow State learns your unique cycle and predicts your next period using your own data, not assumptions. FEATURES • Smart predictions — weighted rolling average based on your cycle history, not a generic 28-day guess • Symptom and mood tracking — log cramps, headache, fatigue, mood changes, and more • Cycle insights — flow intensity patterns, symptom frequency, mood distribution, and correlations • Doctor-ready PDF report — share a clean summary with your healthcare provider • Apple Health and Google Health Connect sync — read and write menstrual data across your health ecosystem • Curated essentials — helpful products for each phase of your cycle • Dark mode — full light, dark, and system theme support • CSV export — download your complete cycle history anytime PRIVACY FIRST Your data never leaves your device. No account, no servers, no analytics, no ads. Period.

Screenshots

ULA Period Tracker4 screens
Flow State Cycle4 screens

Verdict

The call

The clearest difference is in-app purchases: Flow State Cycle at none against ULA Period Tracker's 4. Flow State Cycle also leads on update cadence (every 3 weeks vs every 3 months) and iOS requirement (15.1 vs 26.0). On price, ads 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. ULA Period Tracker sells 4 one-off in-app purchases. Flow State Cycle asks for nothing beyond the download.

UpkeepUpdate frequency

ULA Period Tracker ships an update every 3 months, Flow State Cycle every 3 weeks. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

Scorecard3 real differences · 7 level
ULA Period Tracker versus Flow State Cycle: the parameters behind the verdict, then further details
ParameterULA Period TrackerFlow State Cycle
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, Apple WatchiPhone, iPod
Requires iOS26.015.1 — better
Further details — not scored
Size10 MB33 MB
Age rating12+4+
DeveloperJeronimo Emiliano Ainchil CalahorraBrett East

In-app purchases

4 purchases

ULA Period Tracker

One-time4
  • Small Tip$0.99
  • Medium Tip$2.99
  • Large Tip$3.99
Show 1 more
  • Huge Tip$8.99
None

Flow State Cycle

No in-app purchases

Questions

Is ULA Period Tracker free?
ULA Period Tracker is free to download, with in-app purchases available.
Is Flow State Cycle free?
Flow State Cycle is free to download, with no in-app purchases.
Do ULA Period Tracker or Flow State Cycle have ads?
Neither ULA Period Tracker nor Flow State Cycle shows ads.
Which is updated more often, ULA Period Tracker or Flow State Cycle?
ULA Period Tracker ships an update every 3 months, and Flow State Cycle every 3 weeks. Most recently, ULA Period Tracker was updated on October 16, 2026 and Flow State Cycle on October 5, 2026.

Other comparisons