# Fertility Friend FF Tracker vs Chart35

The clearest difference is in-app purchases: Chart35 at none against Fertility Friend FF Tracker's 4. Chart35 also leads on device support (4 vs 2). Fertility Friend FF Tracker's advantage is ratings volume (7.4K vs 1). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Fertility Friend FF Tracker sells 4 one-off in-app purchases. Chart35 asks for nothing beyond the download.

Chart35 holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Fertility Friend FF Tracker has 7.4K ratings behind it against 1, so its average is the more settled of the two.

Fertility Friend FF Tracker ships an update weekly, Chart35 every 6 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Fertility Friend FF Tracker | Chart35 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (7.4K ratings)](https://appshunter.io/ios/app/fertility-friend-ff-tracker/id443919067/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chart35/id6784113411/reviews)** |
| Number of ratings | **7.4K** | 1 |
| Positive reviews | 78.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 6 days** |
| Monetization | Freemium | — |
| Size | 33 MB | 5 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Tamtris Web Services Inc.](https://appshunter.io/developer/292760734) | [Stephens Page LLC](https://appshunter.io/developer/6777773686) |

## What reviewers say

### Fertility Friend FF Tracker

[App page](https://appshunter.io/ios/app/fertility-friend-ff-tracker/id443919067)

This app helps women track their ovulation and fertile days with advanced charting tools. It provides personalized insights into your cycle, helping you understand your fertility signs and maximize your chances of conception. Millions of women trust it for accurate cycle analysis and pregnancy tracking.

**Highlights:** Ovulation detection, Fertile window prediction, BBT and cervical fluid tracking, Period and symptom logging, Interactive fertility charts, TTC educational library, Pregnancy monitoring

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30 Days VIP Membership | $10.99 | one-time |
| 90 Days VIP Membership | $21.99 | one-time |
| 1 Year VIP - Special Rate | $23.99 | one-time |
| 1 Year VIP Membership | $45.99 | one-time |

**What reviewers like**

- 🚀 Accurate predictions
- 💡 Comprehensive tracking features
- 👍 Helpful educational resources
- 🚀 Detailed data analysis
- 🚀 Customizable symptom tracking

**What reviewers complain about**

- 🐛 Frequent app crashes
- 💰 Expensive premium features
- 🔒 Privacy concerns
- 🕰️ Outdated user interface
- 🐛 Inconsistent data syncing

**Reported bugs**

- Unable to create account
- Randomly deleting custom data
- Inaccurate ovulation predictions
- Pregnancy data not transferring

**Requested features**

- Offline mode with data syncing
- Integration with Apple Health
- More affordable subscription options
- Improved community features
- Streamlined data entry process


### Chart35

[App page](https://appshunter.io/ios/app/chart35/id6784113411)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Fertility Friend FF Tracker free?

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

### Is Chart35 free?

Chart35 is free to download, with no in-app purchases.

### Which has better reviews, Fertility Friend FF Tracker or Chart35?

Chart35 is rated higher. Fertility Friend FF Tracker averages 4.8 out of 5 from 7.4K ratings, while Chart35 averages 5.0 from 1 ratings.

### Do Fertility Friend FF Tracker or Chart35 have ads?

Neither Fertility Friend FF Tracker nor Chart35 shows ads.

### Which is updated more often, Fertility Friend FF Tracker or Chart35?

Fertility Friend FF Tracker ships an update weekly, and Chart35 every 6 days. Most recently, Fertility Friend FF Tracker was updated on October 24, 2026 and Chart35 on October 24, 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.*