# 生辰 vs 给未来写封信

The clearest difference is rating: 给未来写封信 at 4.8 against 生辰's 4.3. On price, review sentiment, ratings volume and update cadence there is nothing between them.

Both are free to download. 生辰 sells 7 in-app purchases, starting at $1.99 per month and 给未来写封信 sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

给未来写封信 holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 48 and 28 respectively. Written reviews point the same way: 76% of 生辰's written reviews are positive against 83% of 给未来写封信's.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 19, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | 生辰 | 给未来写封信 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (48 ratings)](https://appshunter.io/ios/app/id966489322/reviews) | **[4.8 (28 ratings)](https://appshunter.io/ios/app/id1330852849/reviews)** |
| Number of ratings | **48** | 28 |
| Positive reviews | 75.7% of reviews | **82.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Freemium | — |
| Size | 218 MB | 122 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Ningbo If Technology Co.,Ltd](https://appshunter.io/developer/1483428587) | [庆桐 马](https://appshunter.io/developer/1176019983) |

## What reviewers say

### 生辰

[App page](https://appshunter.io/ios/app/id966489322)

This app helps you understand your life's journey, from birth to potential end, and explore ways to extend it. It uses AI to analyze your health data and offers insights into how lifestyle changes can impact your lifespan.

**Highlights:** Explore life clock and expected lifespan, Discover life extension possibilities, Aggregate health data (sleep, exercise, HRV, etc.), AI-powered health analysis, Track lifestyle impact on longevity

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $1.99 | per month |
| 生辰-季度会员 | $2.99 | per 3 months |
| 生辰年度会员 | $9.99 | per year |
| 生辰-季度会员 | $12.99 | per year |
| 生辰-年度会员 | $12.99 | per year |
| 永久会员 | $12.99 | one-time |
| 永久会员 | $14.99 | one-time |


### 给未来写封信

[App page](https://appshunter.io/ios/app/id1330852849)

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 有声信件 | $0.99 | one-time |
| 照片信件 | $0.99 | one-time |
| 录音+照片信件 | $0.99 | one-time |
| 普通信件+1 | $0.99 | one-time |
| Hope Card | $0.99 | one-time |
| 标准版纸质信 | $5.99 | one-time |
| 礼盒版纸质信 | $9.99 | one-time |
| True Love Card | $12.99 | one-time |


## Frequently asked questions

### Is 生辰 free?

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

### Is 给未来写封信 free?

给未来写封信 is free to download, with in-app purchases available.

### Which has better reviews, 生辰 or 给未来写封信?

给未来写封信 is rated higher. 生辰 averages 4.3 out of 5 from 48 ratings, while 给未来写封信 averages 4.8 from 28 ratings.

### Do 生辰 or 给未来写封信 have ads?

Neither 生辰 nor 给未来写封信 shows ads.

### Which is updated more often, 生辰 or 给未来写封信?

生辰 ships an update every 3 weeks, and 给未来写封信 every 3 weeks. Most recently, 生辰 was updated on October 19, 2026 and 给未来写封信 on October 21, 2026.

---

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