# 比特纪 vs iSun

The clearest difference is in-app purchases: 比特纪 at none against iSun's 10. iSun's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. iSun sells 10 one-off in-app purchases. 比特纪 asks for nothing beyond the download.

比特纪 ships an update weekly, iSun every 6 days. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 比特纪 | iSun |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ai/id6657983900/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Weekly | **Every 6 days** |
| Monetization | Free | — |
| Size | 317 MB | 266 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 9+ |
| Developer | [Shanghai Bipo Information Technology Co., Limited](https://appshunter.io/developer/1784419827) | [成都二耶科技有限公司](https://appshunter.io/developer/1763409898) |

## What reviewers say

### 比特纪

[App page](https://appshunter.io/ios/app/ai/id6657983900)

This app offers a unique companionship experience with an AI that grows, remembers, and empathizes with you. It creates a personalized AI partner that lives its own life and shares its experiences, providing emotional support through voice interactions.

**Highlights:** Personalized AI companion, AI with memory and empathy, AI with independent life, Interactive voice communication, Shared growth experience, Emotional support

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

**In-app purchases:** none


### iSun

[App page](https://appshunter.io/ios/app/isun/id6757897149)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 6元购买 | $0.99 | one-time |
| 12元购买 | $1.99 | one-time |
| 18元购买 | $2.99 | one-time |
| 22元购买 | $2.99 | one-time |
| 30元购买 | $3.99 | one-time |
| 35元购买 | $4.99 | one-time |
| 38元购买 | $4.99 | one-time |
| 68元购买 | $9.99 | one-time |
| 98元购买 | $14.99 | one-time |
| 128元购买 | $19.99 | one-time |


## Frequently asked questions

### Is 比特纪 free?

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

### Is iSun free?

iSun is free to download, with in-app purchases available.

### Do 比特纪 or iSun have ads?

比特纪 shows ads; iSun does not.

### Which is updated more often, 比特纪 or iSun?

比特纪 ships an update weekly, and iSun every 6 days. Most recently, 比特纪 was updated on October 24, 2026 and iSun on October 27, 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.*