Comparison

ephira vs ParamWatch

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Local data encryption
  • Track flow, symptoms, moods
  • Log medications and birth control
  • Biometric and password lock
  • Open source code available
  • Data deletion option
Features
Read full description

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.

About

ParamWatch

Features
Read full description

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

ephira4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard1 real difference · 8 level
ephira versus ParamWatch: the parameters behind the verdict, then further details
ParameterephiraParamWatch
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 6 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS15.1 — better16.0
Further details — not scored
Size34 MB1 MB
Age rating17+4+
DeveloperAlexander UlbrichLuca Ceci

In-app purchases

None

ephira

No in-app purchases

None

ParamWatch

No in-app purchases

Questions

Is ephira free?
ephira is free to download, with no in-app purchases.
Is ParamWatch free?
ParamWatch is free to download, with no in-app purchases.
Do ephira or ParamWatch have ads?
Neither ephira nor ParamWatch shows ads.
Which is updated more often, ephira or ParamWatch?
ephira ships an update every 6 months, and ParamWatch every 2 weeks. Most recently, ephira was updated on October 1, 2026 and ParamWatch on September 30, 2026.

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