# 同类象：AI周期生活法｜月经记录 vs i

The clearest difference is in-app purchases: i at none against 同类象：AI周期生活法｜月经记录's 2. i also leads on iOS requirement (15.1 vs 18.0). 同类象：AI周期生活法｜月经记录's advantage is review sentiment (100% vs 80%) and ratings volume (3 vs 1). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. 同类象：AI周期生活法｜月经记录 sells 2 in-app purchases, starting at $2.99 per month. i asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for 同类象：AI周期生活法｜月经记录 against 5.0 for i. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews are what separate them: 100% of 同类象：AI周期生活法｜月经记录's written reviews are positive against 80% of i's.

同类象：AI周期生活法｜月经记录 ships an update every 6 days, i every 10 days. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 同类象：AI周期生活法｜月经记录 | i |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/ai/id6767841648/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/i-dance/id6780227143/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | **100.0% of reviews** | 80.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 10 days |
| Monetization | Freemium | Free with in-app purchases |
| Size | 133 MB | 168 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [成都合并科技有限责任公司](https://appshunter.io/developer/1896513523) | [炜 阮](https://appshunter.io/developer/6778856938) |

## What reviewers say

### 同类象：AI周期生活法｜月经记录

[App page](https://appshunter.io/ios/app/ai/id6767841648)

This app helps women understand their bodies by tracking menstrual cycles and providing personalized daily advice on diet, exercise, and emotional well-being. It aims to foster a deeper connection with one's body, moving beyond simple period tracking to a holistic understanding of bodily rhythms and changes.

**Highlights:** Menstrual cycle tracking, Cycle phase identification, Daily lifestyle suggestions, Body and emotion logging, Cycle pattern insights, Personalized health advice

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $2.99 | per month |
| 年度会员 | $14.99 | per year |


### i

[App page](https://appshunter.io/ios/app/i-dance/id6780227143)

This app helps dancers record, review, and track their progress. It offers tools like mirroring, side-by-side comparison with instructors, and automatic social media cropping. Save every dance and see your improvement visually.

**Highlights:** Video recording and playback, Mirroring and side-by-side comparison, Automatic social media cropping, Dance genre and notes logging, Monthly statistics and cloud backup, Practice assistant with suggestions

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

**In-app purchases:** none


## Frequently asked questions

### Is 同类象：AI周期生活法｜月经记录 free?

同类象：AI周期生活法｜月经记录 is free to download, with in-app purchases available.

### Is i free?

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

### Which has better reviews, 同类象：AI周期生活法｜月经记录 or i?

同类象：AI周期生活法｜月经记录 and i are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.

### Do 同类象：AI周期生活法｜月经记录 or i have ads?

Neither 同类象：AI周期生活法｜月经记录 nor i shows ads.

### Which is updated more often, 同类象：AI周期生活法｜月经记录 or i?

同类象：AI周期生活法｜月经记录 ships an update every 6 days, and i every 10 days. Most recently, 同类象：AI周期生活法｜月经记录 was updated on October 1, 2026 and i on October 7, 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.*