Flow Fasting Tracker vs Olla Period App
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Flow Fasting Tracker
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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/
Olla Period App
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Olla is a private period and symptom tracker that lets you track your health in your own words. Instead of filling in endless forms, simply tell Olla what happened. Log your period, spotting, hot flashes, cramps, headaches, mood, sleep, energy, HRT, medication, pain, or anything else you want to remember. Olla turns what you log into a personal health journal you can explore over time. See when symptoms happened, how often they occurred, and how they changed across days, months, periods, and cycles. Compare anything you track to look for patterns in your own data. Ask Olla questions about your history, such as: - When did I last have a headache? - How often have I logged hot flashes? - Did I have more hot flashes before or after changing my HRT? - How does my sleep compare with my period days? - What symptoms have I logged most this month? Olla is especially useful when your cycle isn't predictable. It doesn't require your body to follow a 28-day cycle, making it useful for irregular periods and perimenopause tracking. Set reminders for anything you want to remember, then check them off in your journal. PRIVATE BY DESIGN Your health data stays on your iPhone. No account. No cloud database. No advertising trackers. Your period and symptom history is yours. Under strict GDPR rules! WITH OLLA YOU CAN ⢠Track periods and spotting ⢠Track symptoms in your own words ⢠Keep a daily health and symptom journal ⢠Track perimenopause symptoms ⢠Log HRT and medications ⢠Track sleep, mood, pain and energy ⢠Compare symptoms and other things you track ⢠See symptom patterns over time ⢠Ask questions about your logged history ⢠Set custom reminders ⢠Review your cycle and period history No rigid symptom checklist. No assumption that every cycle is the same. Just tell Olla what happened and build a useful record of your own body over time. Privacy https://app.notion.com/p/ninakolari/Privacy-Policy-Olla-3dae68c52640804a9d23ec3086fe0ded Terms https://app.notion.com/p/ninakolari/Terms-Conditions-Olla-3dae68c5264080029251e10982f09822
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Verdict
The clearest difference is update cadence: Olla Period App at every 3 days against Flow Fasting Tracker's every 10 days. Flow Fasting Tracker's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 26.5). On price, ads and in-app purchases 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. Flow Fasting Tracker sells 2 in-app purchases, starting at $7.99 per month and Olla Period App sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Flow Fasting Tracker ships an update every 10 days, Olla Period App every 3 days. Both last shipped on October 31, 2026.
| Parameter | Flow Fasting Tracker | Olla Period App |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days | Every 3 days ā better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod ā better | iPhone |
| Requires iOS | 13.0 ā better | 26.5 |
| Further details ā not scored | ||
| Size | 16 MB | 16 MB |
| Age rating | 4+ | 17+ |
| Developer | Kristina Kozicynaite | Katja Nina Kolari |
In-app purchases
Flow Fasting Tracker
- Monthly$7.991 Month
- Annual7 Days trial$39.991 Year
Olla Period App
- Olla Weekly Subscription$2.997 Days
- Olla Annual3 Days trial$19.991 Year
Questions
Is Flow Fasting Tracker free?
Is Olla Period App free?
Do Flow Fasting Tracker or Olla Period App have ads?
Which is updated more often, Flow Fasting Tracker or Olla Period App?
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