ephira vs ParamWatch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ephira
This period tracker prioritizes your privacy by encrypting all data locally on your device. Log your cycle, symptoms, moods, and medications with confidence, knowing your information is secure and can be protected with biometrics or a password.
- Local data encryption
- Track flow, symptoms, moods
- Log medications and birth control
- Biometric and password lock
- Open source code available
- Data deletion option
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Stay aware of your cycle without sacrificing your privacy. Ephira is a secure period-tracker that keeps your data encrypted locally on your device. Track Your Health: Log menstrual flow, symptoms, moods, medications, birth control, and notes. Privacy First: Data is encrypted and never leaves your device. It can be locked behind biometrics (Face ID/Fingerprint) or a custom password, and can be deleted at any time. Open and Transparent: Ephira is open source under the MIT license, and you can review the code at any time on Github.
ParamWatch
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ParamWatch turns your Apple Watch into a real-time dashboard for your body and your surroundings. No extra hardware, no subscription — just clean, live data directly from your watch sensors. BIOMETRICS PAGE · Heart Rate — continuous BPM from HealthKit · SpO₂ — blood oxygen saturation · HRV — heart rate variability in milliseconds, a key indicator of recovery and stress · Respiratory Rate — breaths per minute ACTIVITY PAGE · Speed — real-time GPS speed in km/h with satellite lock indicator · Altitude — elevation above sea level in metres · Distance — total walking/running distance for the day · Steps — step count since midnight · Calories — active energy burned today · Weather — outdoor temperature and humidity, refreshed every 2 minutes from your current location DESIGNED FOR WATCH ParamWatch is a standalone watchOS app. No iPhone app required, no companion needed. The interface fits the watch face with two swipeable pages so every metric is one glance away. PRIVACY FIRST All health data stays on your device. ParamWatch reads from HealthKit but never stores or uploads your personal data. Weather is fetched anonymously from the open-source Open-Meteo API using only your current coordinates — no account required. COMPLICATION INCLUDED A watch complication lets you pin heart rate, speed, and distance directly on any watch face that supports rectangular complications.
Screenshots
Verdict
The clearest difference is update cadence: ParamWatch at every 2 weeks against ephira's every 6 months. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
ephira ships an update every 6 months, ParamWatch every 2 weeks. The most recent releases landed on October 1, 2026 and September 30, 2026 respectively.
| Parameter | ephira | ParamWatch |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 6 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 15.1 — better | 16.0 |
| Further details — not scored | ||
| Size | 34 MB | 1 MB |
| Age rating | 17+ | 4+ |
| Developer | Alexander Ulbrich | Luca Ceci |
In-app purchases
ephira
No in-app purchases
ParamWatch
No in-app purchases









