# Euki vs 28X Private Period Tracker

The clearest difference is rating: 28X Private Period Tracker at 5.0 against Euki's 4.2. 28X Private Period Tracker also leads on review sentiment (100% vs 70%) and update cadence (weekly vs every 3 weeks). Euki's advantage is in-app purchases (none vs 1) and ratings volume (162 vs 3). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. 28X Private Period Tracker sells 1 one-off in-app purchase. Euki asks for nothing beyond the download.

28X Private Period Tracker holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Euki has 162 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 70% of Euki's written reviews are positive against 100% of 28X Private Period Tracker's.

Euki ships an update every 3 weeks, 28X Private Period Tracker weekly. The most recent releases landed on October 26, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Euki | 28X Private Period Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (162 ratings)](https://appshunter.io/ios/app/euki/id1469213846/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/28x-private-period-tracker/id6747716043/reviews)** |
| Number of ratings | **162** | 3 |
| Positive reviews | 70.5% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free | Free |
| Size | 51 MB | 100 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Euki, Inc.](https://appshunter.io/developer/1749121306) | [28x](https://appshunter.io/developer/1822565803) |

## What reviewers say

### Euki

[App page](https://appshunter.io/ios/app/euki/id1469213846)

This app offers comprehensive sexual health information and tracking tools with a strong emphasis on user privacy. It allows for customizable health tracking, period predictions, and access to a content library vetted by experts. Additionally, it features a care navigator to find reproductive health services.

**Highlights:** Customizable health tracking, Period and cycle predictions, Content library on sexual health, Care Navigator for health services, PIN protection for data, Anonymous data storage

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

**In-app purchases:** none

**What reviewers like**

- 🔒 Strong privacy protection and data security
- 💰 Completely free with no paywalls or premium features
- 📱 User-friendly and intuitive interface
- 🎓 Comprehensive reproductive health education resources
- 🔐 PIN protection with fake password decoy feature

**What reviewers complain about**

- 🐛 Frequent app crashes and glitches
- ❌ No dark mode option
- 📤 Cannot export or transfer data between devices
- ⏰ Lacks notification/reminder features for upcoming periods
- 🎨 Unappealing graphics and design aesthetic (subjective)

**Reported bugs**

- App crashes when accessing certain features
- Calendar display missing days
- Randomly added contraceptive shot entries to all logged days
- App crashes when editing past bleeding logs
- Cycle length recalculation not updating after new data

**Requested features**

- Dark mode support
- Data export/import functionality
- Period and ovulation notifications/reminders
- Additional symptom tracking options (back pain, leg cramps, sleep changes, bowel changes, memory issues)
- Basal body temperature tracking


### 28X Private Period Tracker

[App page](https://appshunter.io/ios/app/28x-private-period-tracker/id6747716043)

Understand your menstrual cycle with a privacy-focused period tracker. Log moods, symptoms, and gain insights into your body's patterns from first periods to menopause. All your data stays on your device, with no ads or data selling.

**Highlights:** Period and cycle tracking, Menstrual phase predictions, Mood, energy, and symptom logging, Clinically informed women's health content, Data stored locally on device, No ads, subscriptions, or data selling

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NEON Butterfly | $1.99 | one-time |


## Frequently asked questions

### Is Euki free?

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

### Is 28X Private Period Tracker free?

28X Private Period Tracker is free to download, with in-app purchases available.

### Which has better reviews, Euki or 28X Private Period Tracker?

28X Private Period Tracker is rated higher. Euki averages 4.2 out of 5 from 162 ratings, while 28X Private Period Tracker averages 5.0 from 3 ratings.

### Do Euki or 28X Private Period Tracker have ads?

Neither Euki nor 28X Private Period Tracker shows ads.

### Which is updated more often, Euki or 28X Private Period Tracker?

Euki ships an update every 3 weeks, and 28X Private Period Tracker weekly. Most recently, Euki was updated on October 26, 2026 and 28X Private Period Tracker 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.*