Flowly vs Mirror Delay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flowly
This app tracks your menstrual cycle, integrating biometric data like HRV and sleep from your Apple Watch to predict cognitive peaks, energy windows, and recovery needs. It offers personalized daily recommendations for work, nutrition, and movement based on your cycle phase.
- Predicts periods and cognitive peaks
- Integrates Apple Watch HRV and sleep data
- Personalized daily action recommendations
- Tracks symptoms, mood, and energy
- 5-dimension cognitive performance forecast
- Privacy-focused local data storage
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Flowly is the first cycle tracker built for performance. By combining your menstrual cycle data with real-time HRV, wrist temperature, and sleep quality from Apple Watch, Flowly predicts not just your next period — but your cognitive peak, energy windows, and recovery needs for every day of your cycle. WHAT MAKES FLOWLY DIFFERENT Unlike traditional period trackers, Flowly is built for women who want to understand how their hormones shape their focus, decision-making, creativity, and resilience — not just their fertility. CYCLE & PERIOD TRACKING • Predict your next period with personalized accuracy • Track irregular cycles with adaptive algorithms • Log symptoms, mood, energy, and flow • Sync with Apple Health for seamless data integration HRV & BIOMETRIC INSIGHTS (Apple Watch Required)---Works perfectly with or without an Apple Watch. • Read your Heart Rate Variability (HRV) daily • Monitor wrist skin temperature deviation (Series 8+ / Ultra) • Track sleep quality: deep sleep, REM, and total duration • Calibration mode: 7-day baseline for accurate temperature deviation COGNITIVE PERFORMANCE PREDICTION • 5-dimension radar: Focus · Decision · Creativity · Resilience · Communication • 7-day cognitive forecast based on your cycle phase + HRV • Daily S/A/B/C performance rating on your calendar • Identify your personal peak windows for high-stakes work SMART DAILY ACTIONS (307 personalized templates) • Phase-matched recommendations for work, movement, nutrition, and recovery • Quiet Mode: triggered automatically when HRV drops below your baseline • 4-7-8 breathing guide for stress recovery • Seed Syncing nutrition protocol by cycle phase APPLE WATCH INTEGRATION • Watch face complications: HRV, cycle day, temperature, energy score • Smart Stack card with daily phase summary • Morning check-in: 3-question daily log from your wrist • Ultra: one-tap anomaly marking with Action Button PRIVACY FIRST All data is stored locally on your device. No server uploads. No data selling. Ever. Note: Flowly is not a medical device and should not be used as contraception. Consult your healthcare provider for medical advice. Subscription Terms: https://10m.com.cn/doc/dance/Subscription_Terms_en.html Privacy Policy: https://10m.com.cn/doc/browser/Privacy_Policy_en.html User Agreement: https://10m.com.cn/doc/browser/Terms_of_Services_en.html
Mirror Delay
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See the move you just made. Mirror Delay is a simple delay mirror for training. Open the app, allow the camera, and watch your movement a few seconds later — built for athletes, dancers, martial artists, and anyone improving their form, without recording a full video to review later. Free: - Delay mirror (front camera) - Choose your delay, from 1 to 30 seconds - No account, no sign-up Mirror Delay Plus adds tools for building a better practice setup: - Two-Device Mirror — one device is the camera, the other is the display - Landscape — hold your device sideways for a wider view - Interval Timer — hear a sound at each delay interval while you train - Zoom — zoom in for detail (rear 0.5× ultra-wide supported) - Flip — switch between the front and rear cameras Mirror Delay does not require an account. Your camera view stays on your device unless you use Two-Device Mirror to show it on another nearby device. Mirror Delay Plus is an auto-renewable subscription. Choose monthly or yearly (with a 14-day free trial); the price is shown on the App Store and in the app. Payment is charged to your Apple Account at purchase confirmation. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms of Use: https://kaoru811.github.io/mirror-delay/terms Privacy Policy: https://kaoru811.github.io/mirror-delay/privacy
Screenshots
Verdict
Flowly and Mirror Delay are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Flowly sells 2 in-app purchases, starting at $2.99 per month and Mirror Delay sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
Flowly ships an update every 10 days, Mirror Delay every 6 days. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | Flowly | Mirror Delay |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | — |
| Update frequency | Every 10 days | Every 6 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Requires iOS | 17 | 17.0 |
| Further details — not scored | ||
| Size | 13 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | HOOROO NETWORK PTE. LTD. | Kaoru Okamoto |
In-app purchases
Flowly
- Pro · Monthly7 Days trial$2.991 Month
- Pro · Annual7 Days trial$17.991 Year
Mirror Delay
- Mirror Delay Plus Monthly$3.991 Month
- Mirror Delay Plus Yearly14 Days trial$29.991 Year









