# Ondi: Private Period Tracker — Cycle, Ovulation & Smart Ring

> Cycle, Ovulation & Smart Ring (iPhone/iPad app by Blue Flame Games.)

- Source: https://appshunter.io/ios/app/ondi-private-period-tracker/id6760896784 (this page in markdown: same URL + `.md`)
- Developer: [Blue Flame Games](https://appshunter.io/developer/523824138)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 17.0 · 10 MB
- Languages: American English, French (France), German (Germany), Hindi, Japanese, Chinese (Simplified, China), European Spanish
- Released: 2026-03-26
- Data updated: 2026-10-14

## What is Ondi?

Private period tracking, with daily logs and cycle history on your device. No account required.

Ondi learns your unique cycle and gives you personalised insights that get smarter with every log.

WHAT'S FREE — ALWAYS
  • Period tracking with automatic cycle detection
  • Daily logging: flow, mood, energy, sleep, symptoms
  • Cycle predictions that improve over time
  • Calendar with cycle history
  • Cycle irregularity alerts

UNLOCK EVERYTHING (one-time purchase)
  • Fertility tracking: temperature, cervical mucus, ovulation tests
  • Contraception side effect matching
  • Headache and migraine pattern detection
  • PMS prediction and sleep analysis
  • Exercise guidance tailored to your cycle phase
  • Trying to Conceive mode with timing insights
  • Pregnancy mode: week-by-week guidance and due date
  • Postpartum recovery tracking
  • Data export for doctor appointments

PRIVACY FIRST
Your logs are stored on your device. Ondi does not operate a server for your health records or use tracking analytics. Apple Health access is optional, and you choose when to export or share a report. Copies you export and data stored in Apple Health are managed separately.

EVERY STAGE OF YOUR JOURNEY
  From first periods to menopause, Ondi adapts. Perimenopause pattern detection, postpartum period return guidance, and
  breastfeeding-aware insights — all explained in plain language.

WORKS WITH APPLE WATCH
  Reads wrist temperature and heart rate data from Apple Health to enhance predictions without manual tracking.

Ondi is not a medical device and should not be used as contraception. Predictions are estimates. Always consult a healthcare provider for medical decisions.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Cyla Premium | $7.99 | one-time |


## Is Ondi safe?

Not enough ratings yet to assess Ondi.

## Is Ondi legit?

Ondi: Private Period Tracker appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Ondi is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.5.0 — 2026-10-10

A small tune-up behind the scenes, plus one fix.

• Bug: in Japanese and Chinese, the ring under your cycle day counted "28 items" instead of a 28-day cycle. Fix: it now reads as a 28-day cycle, like it should.

Still no account, no cloud, and nothing leaves your phone.

### 1.4.0 — 2026-10-03

• A new iPad layout with a sidebar and comfortable reading widths, in portrait and landscape.
• Home, Calendar and Insights use side-by-side panels when there is room.
• Daily logs and other sheets adapt to larger screens.
• Fixed an iPad navigation issue that could leave the Smart Ring title visible after returning to Home.

### 1.3.0 — 2026-09-28

What's new in 1.3.0

• A new look. Soft watercolor artwork now follows your cycle on Home, one season for each phase, and greets you on the welcome, pregnancy, postpartum and menopause screens.
• A single day of spotting could persuade Cyla that two cycles were one very long one. It now recognizes spotting for what it is.
• Missing a day or two of logging in the middle of your period no longer splits it into two cycles.
• Logging the first day of your period a day late now moves the start back where it belongs, and periods you add from the past become proper cycles.
• The calendar painted five period days whether you logged two or five. It now shows the days you logged and draws estimates differently.
• Tapping Skip during setup quietly invented a period starting today. Cyla no longer makes things up.
• Home now says "After your period" instead of textbook terms, and the note under your day count tells you something new instead of repeating it.
• Your readout is a few clear lines instead of a paragraph of everything, and Ask Cyla answers the question you actually asked.
• If you had already unlocked Cyla, it could still remind you that your trial was ending. It has been spoken to.
• On some launches Cyla sat on a blank screen, waiting politely for the notifications service. It no longer waits.
• Calendar and Insights now stay where you left them when you switch tabs.
• New in Settings: Discreet notifications and a Reminders switch. Delete All Data can also remove what Cyla saved to Apple Health, and Export Data now includes every day you logged.

### 1.2.8 — 2026-09-22

Updated for iOS 27 with compatibility and reliability improvements.

### 1.2.7 — 2026-09-06

Backdated mood and symptom logs now join the cycle for their actual date, instead of sneaking into the current cycle. Entries outside recorded cycle dates remain saved without inventing a cycle. Your history keeps its dates straight.

## Apps similar to Ondi

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Zylune: Zyklus Tracker](https://appshunter.io/ios/app/zylune-zyklus-tracker/id6769549375) | — | Free | Health & Fitness |
| [Cyla - Period & Cycle Tracker](https://appshunter.io/ios/app/cyla-period-and-cycle-tracker/id6759551287) | — | Free | Health & Fitness |
| [Rinne Cycle&Ovulation Tracker](https://appshunter.io/ios/app/rinne-cycle-and-ovulation-tracker/id6761337729) | — | Free | Health & Fitness |
| [女生月记](https://appshunter.io/ios/app/id6789874493) | — | Free | Health & Fitness |
| [LunaMood: Period & Mood](https://appshunter.io/ios/app/lunamood-period-and-mood/id6786963362) | — | Free | Health & Fitness |
| [Worthy – Daily Affirmations](https://appshunter.io/ios/app/worthy-daily-affirmations/id6781190792) | — | Free | Health & Fitness |

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All apps by Blue Flame Games: https://appshunter.io/developer/523824138

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-14.*