# Euki vs Attune

The clearest difference is update cadence: Attune at every 4 days against Euki's every 3 weeks. Euki's advantage is iOS requirement (13.4 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Euki ships an update every 3 weeks, Attune every 4 days. The most recent releases landed on September 23, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Euki | Attune |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (116 ratings)](https://appshunter.io/ios/app/euki/id1469213846/reviews)** | — |
| Number of ratings | **116** | — |
| Positive reviews | 70.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Free | — |
| Size | 51 MB | 11 MB |
| Requires iOS | **13.4** | 26.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 12+ | 12+ |
| Developer | [Euki, Inc.](https://appshunter.io/developer/1749121306) | [Yushun Ohtatsume](https://appshunter.io/developer/6797223505) |

## 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

**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


### Attune

[App page](https://appshunter.io/ios/app/attune-symptom-patterns/id6797223503)

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

**In-app purchases:** none


## Frequently asked questions

### Is Euki free?

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

### Is Attune free?

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

### Do Euki or Attune have ads?

Neither Euki nor Attune shows ads.

### Which is updated more often, Euki or Attune?

Euki ships an update every 3 weeks, and Attune every 4 days. Most recently, Euki was updated on September 23, 2026 and Attune on September 16, 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.*