Sectra vs LunaDay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sectra
Safely log and analyze your intimate activities, including frequency, duration, and contraception use. Understand your personal health patterns with detailed statistics and a calendar view. Secure your private data with biometric locks and no sign-up required.
- One-tap activity logging
- Partner profiles with memos
- Detailed statistics and trends
- Calendar view of activities
- Apple Health integration
- Biometric and passcode security
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Safely record and manage your private activities. Sectra is a simple tracking app for recording your intimate moments and private activities — dates, frequency, duration, and more. In a completely private space, understand your patterns and rhythms to support your personal health management. ■ Key Features ● One-Tap Recording Just pick a date and tap. Quickly log type, count, duration, and protection use. ● Partner Management Set photos, memos, and tags for each partner. Look back on frequency and patterns. ● Detailed Statistics Monthly trends, weekday heatmaps, time-of-day distribution, streaks, duration analysis — visualize your data from every angle. ● Calendar View See your monthly activity at a glance. ● Apple Health Integration Sync records to the Apple Health app. Toggle on/off per activity. ■ Security ● Lock with Face ID / Touch ID ● 4-digit passcode option (locks for 15 min after 5 failed attempts) ● Background privacy screen (content hidden in app switcher) ● No sign-up required. Open the app and start right away. ■ Recommended For ・Anyone who wants to understand their activity patterns ・Those who want to keep a life log with their partner ・Those managing personal wellness through self-tracking ■ Privacy Your data is strictly managed and never shared with third parties without your consent. *This app is designed for personal health and wellness purposes and does not include any content-sharing features.
LunaDay
A private, offline period tracker focused on digital minimalism. It offers a clean interface, smart predictions, and gentle reminders, with all data stored locally on your device. Enjoy a permanently ad-free experience with a one-time purchase for lifetime access.
- Absolute privacy with local data storage
- Ultra-lightweight and fast performance
- Permanently ad-free interface
- Minimalist calendar view
- Smart period prediction
- Gentle reminders
- iCloud sync for Apple devices
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【Core Philosophy: Your Privacy is Sacred】 In an era of constant connectivity, LunaDay embraces the philosophy of "Digital Minimalism." We believe your cycle data is your most intimate secret. LunaDay is a back-to-basics period tracker that operates entirely offline—no data uploads, no tracking, just a completely private space for you. 【Why Choose LunaDay?】 Absolute Privacy (Pure Local Data) We have no backend servers and collect zero user data. All your records (cycles, symptoms, notes) are encrypted and stored locally on your device or your personal iCloud. Your data belongs to you, and only you. Ultra-Lightweight & Fast Launched in a blink. No bloatware, no social communities, and no irrelevant news feeds. We focus solely on the art of tracking, ensuring the app remains tiny and lightning-fast. Permanently Ad-Free We value your peace of mind. Whether you are a premium user or not, LunaDay’s interface remains clean and elegant. No pop-ups, no banners—just quiet companionship. Fair One-Time Purchase Say goodbye to endless subscriptions. We offer an affordable "Lifetime Membership" for the price of a single coffee. One payment to unlock everything forever and support independent development. 【Feature Highlights】 Minimalist Calendar View: An intuitive interface to see your cycle at a glance. Smart Prediction: Science-based algorithms to help you prepare for your next period. Gentle Reminders: Timely notifications that keep you informed without being intrusive. iCloud Sync: Securely backup and sync your data across your Apple devices. Simple, Pure, and Intuitive. Developer’s Promise: This app does not require internet permissions. All data is stored locally. Your life, your data, your LunaDay.
Screenshots
Verdict
The clearest difference is rating: LunaDay at 5.0 against Sectra's 4.5. Sectra's advantage is in-app purchases (none vs 1) and ratings volume (6 vs 1). On price, update cadence, 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
Both are free to download. LunaDay sells 1 one-off in-app purchase. Sectra asks for nothing beyond the download.
LunaDay holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Sectra has 6 ratings behind it against 1, so its average is the more settled of the two.
Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.
| Parameter | Sectra | LunaDay |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (6 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 6 — better | 1 |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 5 MB |
| Age rating | 17+ | 12+ |
| Developer | Akira Ohnishi | 想 李 |
Customer experience
Sectra
LunaDay
In-app purchases
Sectra
No in-app purchases
LunaDay
- 永久会员权益$0.99









