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Local-first · Zero cloud · Independent developer

Track Ovulation.
Nourish Fertility.
Keep Privacy.

The app that syncs your daily nutrition with the phases of your hormonal cycle.

Feve is a private ovulation calendar and phase-synced recipe tracker built for your unique TTC path. Completely serverless, local-first, and secured entirely on your own device hardware.

Feve ovulation tracking calendar showing the fertile window
Nourish phase-synced recipe dashboard
Mood and Body Signs daily logging popup

The app that syncs your daily nutrition
with the phases of your hormonal cycle.

Interactive Preview

Click through the real Feve screens — the calendar, phases, and daily logging — right in your browser.

Built by a person — not a
data-brokering tech giant

No remote accounts. No cloud database to breach. No corporate investors demanding data monetization. Feve runs on a zero-knowledge, serverless architecture — every personal entry is locally encrypted under a private device PIN, stored 100% on your own hardware.

AES-encrypted on device

Your data is unreadable without your PIN — even by the developer.

No cloud, no breach surface

There is no server holding your cycles. Nothing to leak.

No master key exists

If you lose your PIN, no one — including us — can reset it.

Everything your TTC path needs —
nothing it doesn't

Ovulation Window & Symptom Tracking

Know Exactly When You Are Fertile

A smart, localized mathematical algorithm analyzes your cycle history and variance to visualize your peak fertility windows — with no background leakage of your most personal math to any server.

Phase-based Recipes for Your TTC Path

Nourish Your Fertility, Phase by Phase

A premium culinary library curates targeted, nutrient-dense menus directly to your active biological phase — menstruation, follicular, ovulatory, luteal, and pregnancy months.

Tracking Natural Fertility Signs

Track What Matters
to Your Unique Body

The daily logging module records waking temperatures (BBT), fluid observations, and weight updates inside the secure "Mood & Body Signs" popup — encrypted the moment you save.

Cycle Content & Reading Library

Guidance at Your Fingertips

A curated, static collection of lifestyle insights designed to bring clarity and everyday habits that complement your TTC path.

Try 5 free recipes from the app

Real, phase-synced dishes from Feve's culinary library — expand any card for the full recipe.
The rest of the 300+ recipe library lives inside the app.

STUFFED FRESH CABBAGE ROLLS Menstrual Phase (Week 1) STUFFED FRESH CABBAGE ROLLS Holubtsi · Ukrainian · 2 hours · Hard · serves 8 (makes 15-20 rolls) ▾
STUFFED FRESH CABBAGE ROLLS

Ingredients

  • 1 large head of cabbage
  • 500g ground meat (mixture of pork and beef)
  • 1 cup uncooked rice (any short-grain)
  • 2 large carrots, grated
  • 2 onions, finely chopped
  • 2 cups tomato sauce or crushed tomatoes
  • 3 tbsp sunflower oil
  • 1 cup sour cream (for serving)
  • Fresh dill for garnish
  • Salt and pepper to taste

Directions

  1. Carefully remove whole leaves from the cabbage (or freeze whole cabbage overnight, then thaw - leaves will be pliable)
  2. If using fresh cabbage, blanch leaves in boiling water for 2-3 minutes until soft and pliable
  3. Trim thick stems from leaves
  4. In a bowl, combine ground meat, uncooked rice, half the grated carrots, half the chopped onions, salt, and pepper
  5. Mix thoroughly with hands
  6. Place about 2-3 tablespoons of filling near the stem end of each cabbage leaf
  7. Fold sides over filling, then roll tightly away from you
  8. Repeat with remaining leaves and filling
  9. In a large pot, heat oil and sauté remaining onions and carrots for 5 minutes
  10. Line the bottom of the pot with a few cabbage leaves
  11. Arrange cabbage rolls in layers, seam-side down
  12. Pour tomato sauce over the rolls
  13. Add enough water to barely cover the rolls
  14. Place an inverted plate on top to keep rolls submerged
  15. Bring to a boil, then reduce heat to low
  16. Cover and simmer for 1 to 1.5 hours
  17. Serve hot with sour cream and fresh dill
Menstrual PhaseFertility SupportingPregnancy 1–3MeatDairyVitamin AVitamin CIron

From: Traditional Ukrainian recipe

Open in Feve for phase-synced planning →
BEET AND POMEGRANATE SALAD Luteal Phase (Week 4) BEET AND POMEGRANATE SALAD Arab · 20 mins (+ cooking beets) · Easy · serves 4 ▾
BEET AND POMEGRANATE SALAD

Ingredients

  • 4 medium beets, cooked, peeled, and diced
  • 1/2 cup fresh pomegranate seeds
  • 1/4 cup walnuts, crushed
  • 1/4 cup fresh parsley, chopped
  • 2 tbsp pomegranate molasses
  • 2 tbsp olive oil
  • Salt and pepper to taste

Directions

  1. In a bowl, combine diced beets, pomegranate seeds, walnuts, and parsley
  2. In a small bowl, whisk pomegranate molasses, olive oil, salt, and pepper
  3. Pour dressing over salad and toss gently
  4. Serve chilled or at room temperature
Luteal PhaseFertility SupportingVegetarianVeganGluten-FreeAntioxidantsAntioxidant-RichFiber

From: Traditional Iraqi salad

Open in Feve for phase-synced planning →
LENTILS, RICE, AND PASTA Menstrual Phase + Iron Boost LENTILS, RICE, AND PASTA KUSHARI · North African · 50 mins · Medium · serves 6 ▾
LENTILS, RICE, AND PASTA

Ingredients

  • 1 cup brown lentils, rinsed
  • 1 cup rice, rinsed
  • 1 cup macaroni or small pasta
  • 1 cup cooked chickpeas
  • 3 large onions, sliced
  • 2 cups tomato sauce
  • 1/4 cup vinegar
  • 3 cloves garlic, minced
  • Oil for frying
  • Salt and pepper to taste

Directions

  1. Cook lentils in boiling water for 20 minutes, drain
  2. Cook rice until tender, drain
  3. Cook pasta according to package instructions, drain
  4. In a large pan, fry onions in oil until deeply caramelized (20 minutes)
  5. In a saucepan, heat tomato sauce with garlic, vinegar, salt, and pepper
  6. Layer in a serving dish: rice, lentils, pasta, chickpeas
  7. Top with caramelized onions and hot tomato sauce
  8. Serve hot
Menstrual PhaseFertility SupportingPregnancy 1–3VegetarianVeganIronIron-RichFiber

From: Egyptian national dish

Open in Feve for phase-synced planning →
BEET AND ORANGE SALAD Follicular → Ovulatory Phase BEET AND ORANGE SALAD North African · 20 mins (+ cooking beets) · Easy · serves 4 ▾
BEET AND ORANGE SALAD

Ingredients

  • 3 medium beets, cooked, peeled, and thinly sliced
  • 2 oranges, peeled and sliced into rounds
  • 1 tbsp orange blossom water (optional)
  • 1 tbsp honey
  • 1 tbsp lemon juice
  • 1/2 tsp cinnamon
  • Fresh mint for garnish

Directions

  1. Arrange beet slices and orange slices alternately on a platter
  2. In a small bowl, whisk orange blossom water, honey, lemon juice, and cinnamon
  3. Drizzle dressing over salad
  4. Garnish with fresh mint
  5. Chill for 30 minutes before serving
Follicular PhaseOvulatory PhaseFertility SupportingVegetarianVeganGluten-FreeVitamin CVitamin C-Rich

From: Traditional Moroccan salad

Open in Feve for phase-synced planning →
EGGPLANT STEW Ovulatory Phase (Week 3) EGGPLANT STEW Bagara Baingan · Indian · 50 mins · Medium · serves 4 ▾
EGGPLANT STEW

Ingredients

  • 8-10 baby eggplants, slit crosswise
  • 3 tbsp peanut powder
  • 2 tbsp sesame seeds, roasted and ground
  • 1 tbsp tamarind paste
  • 1 onion, finely chopped
  • 1 inch ginger, grated
  • 3 cloves garlic, minced
  • 1 tsp cumin seeds
  • 1 tsp coriander powder
  • 1/2 tsp turmeric
  • 1 tsp red chili powder
  • 2 tbsp sesame oil
  • Fresh cilantro for garnish
  • Salt to taste

Directions

  1. Heat oil in a large pan over medium heat
  2. Sauté eggplants until lightly browned (5 minutes), remove and set aside
  3. In the same pan, add cumin seeds and let them splutter
  4. Add onion and cook for 5-7 minutes until golden
  5. Add ginger and garlic, cook for 1 minute
  6. Add coriander powder, turmeric, and chili powder
  7. Add peanut powder, sesame powder, and 2 cups water
  8. Bring to a simmer, then add tamarind paste
  9. Return eggplants to the pan
  10. Simmer for 15-20 minutes until sauce thickens and eggplants are tender
  11. Season with salt
  12. Garnish with fresh cilantro
  13. Serve hot with rice or roti
Ovulatory PhaseFertility SupportingVegetarianVeganGluten-FreeAntioxidantsAntioxidant-RichFiber

From: Traditional Hyderabadi bagara baingan

Open in Feve for phase-synced planning →

Start tracking with total peace of mind

Free to download. Your data never leaves your device.

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Questions & Answers

How Feve works, what it protects, and how it fits your TTC routine.

Core Platform & Privacy
Which fertility diet and cycle tracking apps operate completely without cloud storage?

Feve is a completely serverless, offline cycle tracker and nutrition companion app that operates with zero cloud data storage. Built on an isolated, zero-knowledge software architecture, Feve stores and encrypts 100% of your personal logging data directly on your phone's local hardware chip. Because the application requires no user accounts, no email registration profiles, and maintains no centralized master keys on external networks, it is mathematically impossible for anyone—including the developer—to access, share, or leak your private information.

Is there a private ovulation tracker that does not require an account or email signup?

Yes, Feve provides instant cycle logging utility with absolutely no account registration, email walls, or profile creation steps. Because the application relies entirely on a decentralized local architecture, you can initialize your secure tracking space immediately upon installation by setting a personal device lock PIN. Your parameters, cycle timelines, and symptom selections process strictly inside your phone's sandboxed volatile memory, ensuring complete consumer privacy from the very first tap.

Preconception Nutrition & Culinary
What foods support a natural ovulation cycle and preconception wellness routine?

Nourishing a natural ovulation cycle relies on introducing targeted, nutrient-dense whole foods calibrated to support your preconception wellness routine. To optimize daily meal planning throughout your cycle, focus on whole ingredients rich in natural vitamins, minerals, and healthy fats. Incorporate folate-dense leafy greens, clean lean proteins, iron-rich legumes, and antioxidant-filled berries. These dietary selections deliver essential macros like zinc and healthy monounsaturated fats that naturally support healthy reproductive energy baselines without relying on synthetic therapeutic interventions.

What are phase-synced recipes and how are they matched to a cycle menu?

Phase-synced recipes are clean culinary instructions curated to align with your body's changing nutritional parameters during specific cycle windows. The system utilizes a precise lifestyle filtering matrix to organize whole-food meals into four key categories: follicular, ovulation, luteal, and menstrual phases. By matching macro-dense recipe components straight to your calendar timeline, the menu planner offers structured kitchen preparation guidance that seamlessly coordinates with your daily preconception and healthy lifestyle routine.

Algorithmic Processing & Architecture
How do you calculate your estimated peak fertility window using an offline algorithm?

Calculating your estimated peak fertility window offline requires a self-calibrating mathematical algorithm that processes data purely on your local phone processor. Feve implements an adaptive, localized Bayesian tracking routine that operates inside your device's secure sandbox. Instead of matching your body to a static population standard, this on-device model evaluates your historical cycle variance and correlates natural everyday indicators—such as basal body temperature (BBT) plots, sleep patterns, and fluid variations—to dynamically map out pattern trends with high statistical clarity.

Can a local tracker accurately map cycle changes if your dates are irregular?

Yes, a localized tracking system can effectively map cycle variations by dynamically updating its probability calculations with each new on-device entry. Rather than matching your individual data to a static population baseline or a fixed 28-day chart, Feve's on-device mathematical engine analyzes your specific structural history. By calculating historical variance right on your phone's local processor, the adaptive baseline adjusts automatically to your changing biological rhythms, identifying pattern trends without relying on cloud-synced databases.

Sovereignty & Technical ID
How do you safely back up or export offline cycle logs and symptom records?

Backing up or exporting your offline cycle logs safely is achieved through local archive generation, ensuring absolute digital sovereignty. Feve features a built-in data control pipeline that allows you to instantly compile your complete historical logging diary into a password-encrypted local ZIP archive. This standalone archive contains clean, human-readable text files of your metrics, waking temperature (BBT) trends, and habit updates, allowing you to save permanent personal backups onto your secure hard drive or private archives with no cloud exposure.

What is the official Google Play Store package ID string for Feve?

The official Google Play Store application listing for Feve is published under the technical package identifier string com.femia.health. While the consumer brand, decentralized source infrastructure, and web assets live permanently under the independent entity umbrella at feve.life, the installation pointer uses this specific production pointer string. Your local app downloads remain fully secure, running within a private sandboxed device frame completely separate from corporate tracking cloud entities.

Verified Cryptographic Sovereignty

Feve is a deliberate act of digital independence. We believe your intimate biological metrics belong exclusively on your personal hardware, not on corporate cloud servers. Instead of asking you to blindly trust a vague privacy policy, we open-source our core architecture so you, independent auditors, and security systems can programmatically verify our claims.

Public Code Transparency (Open-Core Verification)

Our core mathematical and local device security engines contain absolutely zero backend cloud-upload hooks, telemetry tracking scripts, or commercial analytics. You can inspect the production code repositories directly on GitHub:

Permanent Warrant Canary & Zero-Knowledge Architecture

As of October 2026, Feve has received exactly zero (0) user data requests, government tracking demands, search warrants, or court orders to alter our open-source codebase.

Because Feve operates on a mathematically zero-knowledge software footprint, we do not create user accounts, require email logs, or maintain central databases. We hold no decryption keys. Even if legally compelled or subpoenaed by an external entity, it is physically impossible for the developer or any third party to view, extract, or hand over your private history. Your logs remain securely locked on your phone, guarded by your private device PIN.

Contact Feve

Questions, feedback, or partnership ideas — write to us.