Period or Not vs EveLock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Period or Not
This app tracks your menstrual cycle and provides smart predictions for your period and bleeding duration. It prioritizes user privacy by storing all data locally on your device, with no cloud sync or tracking. You can export your data at any time.
- Local data storage
- Smart cycle predictions
- Bleeding duration predictions
- Data export and backup
- Optional calendar sync
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Your cycle data belongs to you. Not us. Not advertisers. Not anyone. Period or Not is the period tracker built for people who value their privacy as much as their health. How it works: Log your period Get smart cycle & bleeding duration predictions Export your data anytime (Backup & Restore) Sync to Apple or Google calendar (optional) Why we're different We went Full Local. Your data lives 100% on your device. We don't have servers, and we don't have a database of your cycles. Unlike usage of "secure cloud storage" in other apps, we chose Zero Cloud. Nothing leaves your phone unless you export it. No analytics or behavioral tracking No data selling (we literally can't, we don't have your data) Built by a woman, for women. This isn't a VC-backed data harvesting machine. It's an indie app made by someone who actually uses it and gives a damn about your privacy. In a world where period apps have made headlines for privacy breaches, we built something different. Your health data is yours. Period.
EveLock
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Private, offline cycle & mood tracker. EveLock helps you log periods, symptoms, and moods—without accounts, cloud sync, or tracking. Your data lives on your iPhone and can be protected with a PIN/Face ID. Why EveLock * No account or cloud — nothing leaves your device * PIN / Face ID lock — keep entries private * Simple calendar — log periods in seconds * Predictions — see upcoming cycles and fertile windows (wellness only) * Moods & symptoms — cramps, headaches, energy, notes, and more * Dark Mode + large text — easy on the eyes and accessible * Export — optional local backup/share when you choose Privacy, by design EveLock doesn’t use analytics, ads, or third-party SDKs. We don’t collect or sell data—ever. Important EveLock is a general-wellness app and does not provide medical advice or diagnosis. Always consult a qualified professional for health decisions.
Screenshots
Verdict
The clearest difference is in-app purchases: EveLock at none against Period or Not's 1. Period or Not's advantage is update cadence (every 3 weeks vs every 8 months). On price, ads, device support and iOS requirement 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. Period or Not sells 1 one-off in-app purchase. EveLock asks for nothing beyond the download.
Period or Not ships an update every 3 weeks, EveLock every 8 months. The most recent releases landed on October 20, 2026 and October 4, 2026 respectively.
| Parameter | Period or Not | EveLock |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (3 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 3 weeks — better | Every 8 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 16.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 44 MB | 8 MB |
| Age rating | 9+ | 12+ |
| Developer | Antonija Pek | Sasa Milat |
In-app purchases
Period or Not
- Super Turbo$3.99
EveLock
No in-app purchases
