Add Daily Biorhythm Readings to Your Wellness App

About the author: Tatiana Zhuravleva is a Numerologist and Esoteric Author with 19 years of experience in numerology and crystal healing. She specializes in Pythagorean life path analysis and the Destiny Matrix system, and has authored three books on numerological self-development with over 200,000 copies sold across Russia, Ukraine, and the Baltic states.

Why daily biorhythm belongs in every wellness app

Wellness apps thrive on daily engagement. Users open them for morning routines, mood tracking, meditation reminders, and energy forecasts. A daily biorhythm reading fits naturally into this pattern. It gives users a number they can act on: a 3/10 energy day means rest and recovery, an 8/10 means tackling that hard problem.

The challenge is consistency. If your push notification says "Energy: 7/10" at 7 AM, the in-app widget must show the same value at 3 PM. Traditional biorhythm calculations require a birth date, which creates friction during onboarding. Users who skip the birth date field get no value from the feature.

The RoxyAPI Biorhythm API solves both problems with a single daily endpoint that uses seeded randomness and requires no birth date at all.

How the daily biorhythm endpoint works

The /daily endpoint accepts a seed string and a date. It returns the same reading every time you call it with the same inputs. No birth date. No user profile lookup. One stateless request.

Here is what you get back:

• energyRating: A score from 1 (Deep Recovery) to 10 (Peak Performance)
• overallPhase: One of high_energy, mixed, recovery, or critical
• spotlight: A featured cycle (physical, emotional, or intellectual) with its value, phase, and a personalized message
• quickRead: Values for all three primary cycles (-100 to 100)
• dailyMessage: A pre-formatted string ready for push notifications
• advice: One to two sentences of actionable guidance

The seed determines which cycle gets the spotlight. Pass a user ID as the seed, and each user sees a different featured cycle while getting consistent results throughout the day.

Ready to build this? RoxyAPI Biorhythm API gives you daily readings with zero configuration and deterministic caching. See pricing.

Complete working example with curl

curl -X POST https://roxyapi.com/api/v2/biorhythm/daily \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_API_KEY" \
  -d '{"seed":"user123","date":"2026-04-11"}'

Response:

{
  "date": "2026-04-11",
  "seed": "user123-2026-04-11",
  "energyRating": 6,
  "overallPhase": "mixed",
  "spotlight": {
    "cycle": "intellectual",
    "value": 19,
    "phase": "rising",
    "message": "Your intellectual energy is building..."
  },
  "quickRead": {
    "physical": 82,
    "emotional": -43,
    "intellectual": 19
  },
  "dailyMessage": "Your biorhythm for 2026-04-11: Energy rating 6/10 (Balanced)...",
  "advice": "Start engaging with complex material..."
}

Notice the seed in the response: user123-2026-04-11. The API combines your input seed with the date automatically. Call it again with the same inputs tomorrow and you get a fresh reading. Call it again today and you get the exact same one.

Implementation pattern: morning cron plus push notification

The most common integration pattern is a morning cron job that fetches readings and triggers push notifications. Here is a complete TypeScript implementation:

import RoxyAPI from "@roxyapi/sdk";

const roxy = new RoxyAPI({ apiKey: process.env.ROXYAPI_KEY });

async function sendMorningBiorhythm(userId: string) {
  const today = new Date().toISOString().split("T")[0];

  const reading = await roxy.biorhythm.daily({
    seed: userId,
    date: today,
  });

  await sendPushNotification(userId, {
    title: `Energy: ${reading.energyRating}/10`,
    body: reading.dailyMessage,
    data: { screen: "biorhythm", date: today },
  });
}

// Run at 7 AM for each user
for (const user of activeUsers) {
  await sendMorningBiorhythm(user.id);
}

This pattern works because the reading is deterministic. If the user taps the notification and opens the app, you can call the endpoint again with the same seed and date. The widget renders the same energy rating the notification showed. No database storage needed for the reading itself.

Energy rating scale and what each level means

The energy rating maps to ten distinct levels. Each level carries a label that you can display directly in your UI:

Your app can use the rating to customize the entire daily experience. A meditation app might suggest longer sessions on low-energy days. A fitness app might recommend lighter workouts during recovery phases. A productivity app might defer hard tasks to high-energy mornings.

Building a biorhythm widget for daily check-ins

A biorhythm widget needs three things: the energy rating as a headline number, the spotlight cycle as the featured insight, and the advice as the call to action. Here is how to structure it:

function BiorhythmWidget({ reading }) {
  return {
    headline: `${reading.energyRating}/10`,
    phase: reading.overallPhase,
    insight: reading.spotlight.message,
    action: reading.advice,
    cycles: reading.quickRead,
  };
}

The quickRead object gives you three values to render as a mini chart: physical, emotional, and intellectual. Each ranges from -100 to 100. Positive means the cycle is in its active phase. Negative means recovery. Values near zero indicate a critical transition day.

For in-app notifications, use the dailyMessage field directly. It comes pre-formatted with the date, energy rating, and spotlight cycle. No string templating needed on your end.

Why seeded randomness matters for wellness features

Traditional biorhythm calculators require a birth date because they model sine waves from the day of birth. This creates two problems for app developers. First, you need the birth date during onboarding, which increases friction and drop-off. Second, every user with the same birth date gets identical readings, which feels impersonal.

The daily endpoint uses seeded pseudorandomness instead. The seed (typically a user ID) determines which cycle gets featured. The date determines the cycle values. This means:

• Two users with the same birth date get different spotlight cycles
• The same user always sees the same reading on the same day
• No birth date collection required
• No user state to manage on your server
• Cached responses (the endpoint sets a 1-hour cache TTL)

For apps that do collect birth dates, the Biorhythm API also offers a full /reading endpoint with all 10 cycle calculations personalized to a specific birth date. You can offer both: a quick daily check-in with no setup, and a personalized deep-dive for users who provide their birth date.

Frequently Asked Questions

Q: Does the daily biorhythm endpoint require a birth date? A: No. The daily endpoint is birth-date-independent. It uses a seed string and a date to generate consistent readings. This makes it ideal for biorhythm widgets, daily notifications, and check-in features where collecting a birth date would add friction.

Q: Will the same API call return different results at different times of day? A: No. The same seed and date combination always produces the same response. You can call it from your cron job at 6 AM and again from your widget at 9 PM. The energy rating, spotlight cycle, daily message, and advice will be identical.

Q: How do I make each user see a different daily biorhythm reading? A: Pass a unique identifier as the seed parameter. A user ID, email hash, or any stable string works. The seed determines which cycle gets featured as the spotlight, so different users see different insights even on the same day.

Q: What is the difference between energyRating and quickRead values? A: The energyRating is a composite score from 1 to 10 representing overall energy. The quickRead contains individual cycle values from -100 to 100 for physical, emotional, and intellectual cycles. Use the rating for headlines and notifications, and the individual values for detailed charts.

Q: Can I use the daily biorhythm endpoint for push notifications? A: Yes. The deterministic nature of the endpoint makes it perfect for biorhythm notifications. Fetch the reading in your cron job, send the push with the energy rating, and when the user taps it, call the same endpoint again to render the full widget. Results will match.

Start building today

The daily biorhythm endpoint turns a single API call into a complete daily engagement feature. No birth date collection. No state management. No inconsistency between notifications and in-app display. One seed, one date, one reading that stays stable all day.

Integrate the Biorhythm API into your wellness app and give users a reason to check in every morning. View the full API reference for all available endpoints, or check pricing to get started.