# Femometer Fertility Tracker vs Power 40

The clearest difference is in-app purchases: Power 40 at none against Femometer Fertility Tracker's 10. Power 40 also leads on iOS requirement (12.0 vs 15.0). Femometer Fertility Tracker's advantage is ratings volume (71K vs 2) and device support. On price and rating there is nothing between them.

Both are free to download. Femometer Fertility Tracker sells 9 in-app purchases, starting at $6.99 per 7 days. Power 40 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Femometer Fertility Tracker against 5.0 for Power 40. That said, the two scores are not equally well evidenced: Femometer Fertility Tracker has 71K ratings behind it against 2, so its average is the more settled of the two.

## The numbers

| Metric | Femometer Fertility Tracker | Power 40 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (71K ratings)](https://appshunter.io/ios/app/femometer-fertility-tracker/id1269972832/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/power-40/id6578458075/reviews)** |
| Number of ratings | **71K** | 2 |
| Positive reviews | 65.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Fortnightly | — |
| Monetization | Free with in-app purchases | **Free** |
| Size | 253 MB | 66 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | — |
| Age rating | 12+ | 12+ |
| Developer | [Bongmi Global Group](https://appshunter.io/developer/1526416891) | [ECOM IUSL DIGITAL LLC](https://appshunter.io/developer/1759604804) |

## What reviewers say

### Femometer Fertility Tracker

[App page](https://appshunter.io/ios/app/femometer-fertility-tracker/id1269972832)

This app helps women track their menstrual cycles, predict ovulation, and monitor fertility. It records period dates, symptoms, and test results to provide personalized insights and increase conception rates. It also supports users throughout pregnancy with tracking and educational resources.

**Highlights:** Period and PMS tracking, Ovulation and fertile window prediction, Basal Body Temperature (BBT) charting, Cervical Mucus (CM) logging, Pregnancy test result recording, Fertility insights and conception guidance, Pregnancy journey tracking

**Features:** macOS Compatibility, Apple Wallet, Apple Watch app

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Femometer Prime | $6.99 | per 7 days |
| Femometer Prime | $9.99 | per month |
| Femometer Ovulation Calculator | $9.99 | per month |
| Femometer Prime | $11.99 | per month |
| Femometer Prime | $19.99 | per 3 months |
| Femometer Period Tracker Pro | $19.99 | per 3 months |
| Advanced Fertility Insights | $29.99 | per year |
| Femometer Prime | $49.99 | per year |
| Femometer Prime | $49.99 | per year |

**What reviewers like**

- 🚀 Reliable and accurate predictions
- 👍 Customizable and helpful features
- 💡 Intelligent LH test recognition
- 👍 Great for tracking cycles and ovulation

**What reviewers complain about**

- 🐛 Syncing and connectivity issues
- 🔍 Limited fertility factor tracking
- 💬 Overwhelming community discussions
- 💰 Paywall for key features

**Reported bugs**

- App crashes and data loss
- Inaccurate ovulation predictions
- Login and account issues
- Deleted user history

**Requested features**

- Option to hide community feed
- Improved data export and backup
- Tracking for rare pregnancy conditions
- More skin tone options for pregnancy tracking


### Power 40

[App page](https://appshunter.io/ios/app/power-40/id6578458075)

Manage your gym workouts and activities effortlessly. Book classes, purchase or renew plans, and receive timely notifications to stay on track with your fitness goals. This app offers a quick, interactive, and easy way to control your training from anywhere.

**Highlights:** Workout control, Interactive training management, Class booking, Plan purchase and renewal, Activity cancellation, Notifications

**In-app purchases:** none


## Frequently asked questions

### Is Femometer Fertility Tracker free?

Femometer Fertility Tracker is free to download, with in-app purchases available.

### Is Power 40 free?

Power 40 is free to download, with no in-app purchases.

### Which has better reviews, Femometer Fertility Tracker or Power 40?

Power 40 is rated higher. Femometer Fertility Tracker averages 4.9 out of 5 from 71K ratings, while Power 40 averages 5.0 from 2 ratings.

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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.*