# RED Effect vs Pregmate Ovulation Tracker

The clearest difference is review sentiment: Pregmate Ovulation Tracker at 89% against RED Effect's 7%. Pregmate Ovulation Tracker also leads on rating (4.9 vs 1.8) and ads (none vs shown). RED Effect's advantage is in-app purchases (none vs 12) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. Pregmate Ovulation Tracker sells 12 in-app purchases, starting at $9.99 per month. RED Effect asks for nothing beyond the download.

Pregmate Ovulation Tracker holds the better App Store score, 4.9 against 1.8. That said, the two scores are not equally well evidenced: Pregmate Ovulation Tracker has 13K ratings behind it against 50, so its average is the more settled of the two. Written reviews point the same way: 7% of RED Effect's written reviews are positive against 89% of Pregmate Ovulation Tracker's.

RED Effect ships an update every 2 months, Pregmate Ovulation Tracker fortnightly. The most recent releases landed on October 8, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | RED Effect | Pregmate Ovulation Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (50 ratings)](https://appshunter.io/ios/app/red-effect/id1206779889/reviews) | **[4.9 (13K ratings)](https://appshunter.io/ios/app/pregmate-ovulation-tracker/id1610694094/reviews)** |
| Number of ratings | 50 | **13K** |
| Positive reviews | 7.4% of reviews | **88.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Best chart rank | — | **#146** |
| Size | 68 MB | 196 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [ZIFIT LA JOLLA, INC.](https://appshunter.io/developer/1468958805) | [Asteria LLC](https://appshunter.io/developer/1830083794) |

## What reviewers say

### RED Effect

[App page](https://appshunter.io/ios/app/red-effect/id1206779889)

This app allows users to easily book infrared fitness classes. It provides access to the benefits of infrared training through a convenient booking system, enabling users to select classes by location, date, and time.

**Highlights:** Book fitness classes, Infrared benefits, High intensity interval training, Select location, date, and time, Daily class availability

**Features:** macOS Compatibility

**In-app purchases:** none


### Pregmate Ovulation Tracker

[App page](https://appshunter.io/ios/app/pregmate-ovulation-tracker/id1610694094)

**Currently charting:** #146 Top Free · Health & Fitness, #151 Top Grossing · Health & Fitness (US App Store)

Easily track ovulation, predict fertile days, and understand your cycle. Scan test strips with your phone's camera for automatic analysis. Get personalized insights and reminders to maximize your chances of conception.

**Highlights:** Accurate ovulation predictions, Test strip reader with auto-detection, Personalized fertility window tracking, Period and cycle tracking, Daily insights and reminders, Easy-to-read reports

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pregmate Pro Plan | $9.99 | per month |
| Pregmate Pro Plan | $9.99 | per month |
| Pregmate Pro Plan | $19.99 | per month |
| Pregmate Pro Plan | $19.99 | per month |
| Pregmate Pro Plan | $29.99 | per year |
| Pregmate Pro Plan | $39.99 | per year |
| One-time offer | $49.99 | per year |
| Pregmate Pro Plan | $59.99 | per year |
| Pregmate Pro Plan | $59.99 | per year |
| Pregmate Pro Plan | $59.99 | per year |
| Pregmate Pro Plan | $69.99 | per year |
| Pregmate Pro Plan | $69.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 📷 Ability to take photos of test strips
- 🗓️ Helpful for tracking cycle and ovulation
- 💰 Great value for money
- 🔍 Accurate ovulation predictions

**What reviewers complain about**

- 🐛 Ovulation predictions not always accurate
- 🔀 Inconsistent fertility window indicators across app
- 🔍 Limited ability to manually adjust cycle data

**Reported bugs**

- Picture feature doesn't accurately interpret test results
- Navigation issues when adding historical cycle data

**Requested features**

- Add basal body temperature tracking
- Improve fertility window prediction accuracy
- Allow more customization of cycle data


## Frequently asked questions

### Is RED Effect free?

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

### Is Pregmate Ovulation Tracker free?

Pregmate Ovulation Tracker is free to download, with in-app purchases available.

### Which has better reviews, RED Effect or Pregmate Ovulation Tracker?

Pregmate Ovulation Tracker is rated higher. RED Effect averages 1.8 out of 5 from 50 ratings, while Pregmate Ovulation Tracker averages 4.9 from 13K ratings.

### Do RED Effect or Pregmate Ovulation Tracker have ads?

RED Effect shows ads; Pregmate Ovulation Tracker does not.

### Which is updated more often, RED Effect or Pregmate Ovulation Tracker?

RED Effect ships an update every 2 months, and Pregmate Ovulation Tracker fortnightly. Most recently, RED Effect was updated on October 8, 2026 and Pregmate Ovulation Tracker on October 12, 2026.

---

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