# Ovulation Estimator vs RhythmX

The clearest difference is update cadence: RhythmX at fortnightly against Ovulation Estimator's every 6 months. On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Ovulation Estimator against 5.0 for RhythmX. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Ovulation Estimator ships an update every 6 months, RhythmX fortnightly. The most recent releases landed on October 16, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Ovulation Estimator | RhythmX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/ovulation-estimator/id529437218/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/rhythmx-period-tracker/id6740507389/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 6 MB | 2 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Malay Patel](https://appshunter.io/developer/510333524) | [ShapeHaven Innovations LLC](https://appshunter.io/developer/1747127977) |

## What reviewers say

### Ovulation Estimator

[App page](https://appshunter.io/ios/app/ovulation-estimator/id529437218)

This health tool helps you estimate your ovulation date. Simply enter your last menstrual period and cycle length to predict your most fertile days. It's designed for women tracking their reproductive health.

**Highlights:** Ovulation date calculation, Last menstrual period input, Period cycle length input, Fertile window prediction, Health and fitness tracking

**Features:** macOS Compatibility

**In-app purchases:** none


### RhythmX

[App page](https://appshunter.io/ios/app/rhythmx-period-tracker/id6740507389)

This app helps you understand your menstrual cycle with a focus on privacy and simplicity. It offers educational insights into cycle phases, custom tracking, and easy data management, all stored locally on your device.

**Highlights:** Educational cycle phase insights, Customizable symptom and mood tracking, Editable calendar views, Data archiving and pattern review, Tag search for insights, Open-source code

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Ovulation Estimator free?

Ovulation Estimator is free to download, with no in-app purchases.

### Is RhythmX free?

RhythmX is free to download, with no in-app purchases.

### Which has better reviews, Ovulation Estimator or RhythmX?

Ovulation Estimator and RhythmX are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Ovulation Estimator or RhythmX have ads?

Neither Ovulation Estimator nor RhythmX shows ads.

### Which is updated more often, Ovulation Estimator or RhythmX?

Ovulation Estimator ships an update every 6 months, and RhythmX fortnightly. Most recently, Ovulation Estimator was updated on October 16, 2026 and RhythmX on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*