# 给未来写封信 vs 素记日记, Diary, Mood Tracker

The clearest difference is rating: 给未来写封信 at 4.8 against 素记日记, Diary, Mood Tracker's 4.6. 素记日记, Diary, Mood Tracker's advantage is iOS requirement (13.0 vs 15.0). On price, review sentiment, ratings volume and update cadence there is nothing between them.

Both are free to download. 给未来写封信 sells 8 one-off in-app purchases and 素记日记, Diary, Mood Tracker sells 4 in-app purchases, starting at $4.99 per month. 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 4.6. Both are backed by a comparable volume of ratings — 28 and 49 respectively. Written reviews complicate that: 83% of 给未来写封信's written reviews are positive against 88% of 素记日记, Diary, Mood Tracker's, so the app with the better star average is not the one people write more warmly about.

给未来写封信 ships an update every 3 weeks, 素记日记, Diary, Mood Tracker fortnightly. The most recent releases landed on October 17, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 给未来写封信 | 素记日记, Diary, Mood Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (28 ratings)](https://appshunter.io/ios/app/id1330852849/reviews)** | [4.6 (49 ratings)](https://appshunter.io/ios/app/diary-mood-tracker/id6496847689/reviews) |
| Number of ratings | 28 | **49** |
| Positive reviews | 82.6% of reviews | **87.5% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 122 MB | 94 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [庆桐 马](https://appshunter.io/developer/1176019983) | [武杰 陈](https://appshunter.io/developer/1738026409) |

## What reviewers say

### 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 |


### 素记日记, Diary, Mood Tracker

[App page](https://appshunter.io/ios/app/diary-mood-tracker/id6496847689)

A minimalist and elegant diary app with a vintage Chinese aesthetic. It allows users to record life's moments with rich fonts, custom backgrounds, and image support. Features include calendar overviews, search, cloud sync, and secure password protection.

**Highlights:** Multiple font options, Chinese-style stationery backgrounds, Insert images into entries, Calendar view of past entries, Keyword search for diaries, iCloud sync and backup, Password and biometric protection

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 日记月度会员 | $4.99 | per month |
| 日记年度会员 | $9.99 | per year |
| 日记本-记录生活永久会员 | $14.99 | one-time |
| 日记永久会员 | $14.99 | one-time |


## Frequently asked questions

### Is 给未来写封信 free?

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

### Is 素记日记, Diary, Mood Tracker free?

素记日记, Diary, Mood Tracker is free to download, with in-app purchases available.

### Which has better reviews, 给未来写封信 or 素记日记, Diary, Mood Tracker?

给未来写封信 is rated higher. 给未来写封信 averages 4.8 out of 5 from 28 ratings, while 素记日记, Diary, Mood Tracker averages 4.6 from 49 ratings.

### Do 给未来写封信 or 素记日记, Diary, Mood Tracker have ads?

Neither 给未来写封信 nor 素记日记, Diary, Mood Tracker shows ads.

### Which is updated more often, 给未来写封信 or 素记日记, Diary, Mood Tracker?

给未来写封信 ships an update every 3 weeks, and 素记日记, Diary, Mood Tracker fortnightly. Most recently, 给未来写封信 was updated on October 17, 2026 and 素记日记, Diary, Mood Tracker on October 14, 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.*