# Maybe Baby™ Fertility Tracker vs Sync Spin

The clearest difference is price: Sync Spin at Free against Maybe Baby™ Fertility Tracker's $4.99. Sync Spin also leads on in-app purchases (none vs 3) and rating (5.0 vs 4.7). Maybe Baby™ Fertility Tracker's advantage is ratings volume (1.1K vs 10) and chart position (#61 vs unranked). On ads and iOS requirement there is nothing between them.

Sync Spin is free to download; Maybe Baby™ Fertility Tracker costs $4.99 up front. Maybe Baby™ Fertility Tracker sells 3 one-off in-app purchases. Sync Spin asks for nothing beyond the download.

Sync Spin holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Maybe Baby™ Fertility Tracker has 1.1K ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 85% of Maybe Baby™ Fertility Tracker's written reviews are positive against 100% of Sync Spin's.

Maybe Baby™ Fertility Tracker ships an update every 4 months, Sync Spin monthly. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Maybe Baby™ Fertility Tracker | Sync Spin |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.7 (1.1K ratings)](https://appshunter.io/ios/app/maybe-baby-fertility-tracker/id349630670/reviews) | **[5.0 (10 ratings)](https://appshunter.io/ios/app/sync-spin/id6739968248/reviews)** |
| Number of ratings | **1.1K** | 10 |
| Positive reviews | 85.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#61** | — |
| Size | 10 MB | 27 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [BazilSoft](https://appshunter.io/developer/349630673) | [Richard Witherspoon](https://appshunter.io/developer/1690898003) |

## What reviewers say

### Maybe Baby™ Fertility Tracker

[App page](https://appshunter.io/ios/app/maybe-baby-fertility-tracker/id349630670)

**Currently charting:** #61 Top Paid · Health & Fitness (US App Store)

Track your menstrual cycle, predict ovulation, and identify fertile windows. This app offers insights into potential pregnancy and even suggests the likely gender of your baby. It supports multiple languages and is updated regularly.

**Highlights:** Period tracking, Ovulation prediction, Fertile window identification, Pregnancy possibility indicator, Baby gender prediction, Multilingual support

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month subscription | $4.99 | one-time |
| 3 months subscription | $11.99 | one-time |
| 12 months subscription | $29.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🎯 Accurate predictions
- 💕 Helped conceive desired gender
- 📆 Helpful for family planning
- 🔁 Reliable cycle tracking

**What reviewers complain about**

- 🔍 Limited customization options
- 🔢 Inability to input ovulation data
- 💰 Expensive for basic features

**Reported bugs**

- Inconsistent cycle tracking when updating start date
- Glitches in gender prediction functionality

**Requested features**

- Add ability to input ovulation test results
- Provide more detailed cycle analysis and insights
- Allow editing of previous cycle data


### Sync Spin

[App page](https://appshunter.io/ios/app/sync-spin/id6739968248)

This app enhances indoor cycling workouts by connecting to Echelon smart bikes. It provides real-time metrics, detailed summaries, and historical insights to help users track progress and achieve fitness goals.

**Highlights:** Real-time metrics tracking, Detailed workout summaries, HealthKit integration, Interactive charts, Historical insights, Customizable dashboard

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

**In-app purchases:** none


## Frequently asked questions

### Is Maybe Baby™ Fertility Tracker free?

Maybe Baby™ Fertility Tracker costs $4.99, and also offers in-app purchases.

### Is Sync Spin free?

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

### Which has better reviews, Maybe Baby™ Fertility Tracker or Sync Spin?

Sync Spin is rated higher. Maybe Baby™ Fertility Tracker averages 4.7 out of 5 from 1.1K ratings, while Sync Spin averages 5.0 from 10 ratings.

### Do Maybe Baby™ Fertility Tracker or Sync Spin have ads?

Neither Maybe Baby™ Fertility Tracker nor Sync Spin shows ads.

### Which is updated more often, Maybe Baby™ Fertility Tracker or Sync Spin?

Maybe Baby™ Fertility Tracker ships an update every 4 months, and Sync Spin monthly. Most recently, Maybe Baby™ Fertility Tracker was updated on November 1, 2026 and Sync Spin on October 30, 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.*