# Time Caps vs 给未来写封信

The clearest difference is ratings volume: Time Caps at 153 against 给未来写封信's 26. 给未来写封信's advantage is iOS requirement (12.0 vs 15.0). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Time Caps sells 6 in-app purchases, starting at $3.99 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.

On the App Store both sit at effectively the same score — 4.8 for Time Caps against 4.8 for 给未来写封信. That said, the two scores are not equally well evidenced: Time Caps has 153 ratings behind it against 26, so its average is the more settled of the two. Written reviews are what separate them: 84% of Time Caps's written reviews are positive against 83% of 给未来写封信's.

Time Caps ships an update every 6 weeks, 给未来写封信 every 3 weeks. The most recent releases landed on September 2, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | Time Caps | 给未来写封信 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (153 ratings)](https://appshunter.io/ios/app/time-caps-a-future-diary/id1195852313/reviews) | [4.8 (26 ratings)](https://appshunter.io/ios/app/id1330852849/reviews) |
| Number of ratings | **153** | 26 |
| Positive reviews | **83.7% of reviews** | 82.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Freemium | — |
| Size | 18 MB | 163 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [灿海 陈](https://appshunter.io/developer/1068107051) | [庆桐 马](https://appshunter.io/developer/1176019983) |

## What reviewers say

### Time Caps

[App page](https://appshunter.io/ios/app/time-caps-a-future-diary/id1195852313)

This app allows users to create a digital diary with various types of entries, including daily reflections, future messages, and voice notes. It offers features like mood-based coloring, serendipitous retrieval of past entries, and secure privacy protection. Users can also subscribe for enhanced functionalities and premium features.

**Highlights:** Daily mood-based journal entries, Write messages to your future self, Record voice notes for the future, Serendipitous retrieval of past entries, Secure passcode and biometric lock, Daily reminders and widgets, Offline functionality

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Time Traveler Pro (Monthly) | $3.99 | per month |
| Time Traveler Pro (Yearly) | $24.99 | per year |
| 1200 Cap Pieces | $0.99 | one-time |
| 2888 Cap Pieces | $1.99 | one-time |
| 3600 Cap Pieces | $2.99 | one-time |
| 5000 Cap Pieces | $3.99 | one-time |

**What reviewers like**

- 💡 Unique concept of time capsules
- 👍 Easy and simple to use
- 💖 Encourages journaling habit
- 😊 Calming and beautiful design
- ✨ Helps self-reflection and growth

**What reviewers complain about**

- 💰 In-app purchases for features
- 💸 High cost for capsules/features
- 🔒 Password lock feature requires subscription
- 📈 Difficulty in exporting data
- 😔 Word cap can be restrictive

**Reported bugs**

- 🐛 Interface issues with updates
- 🐛 Face ID issues reported

**Requested features**

- Ability to export previous posts
- Lower gem prices for capsules
- More options for describing the day
- Add template feature
- Support dark mode


### 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 Time Caps free?

Time Caps 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, Time Caps or 给未来写封信?

Time Caps and 给未来写封信 are both rated 4.8 out of 5 on the App Store, from 153 and 26 ratings respectively.

### Do Time Caps or 给未来写封信 have ads?

Neither Time Caps nor 给未来写封信 shows ads.

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

Time Caps ships an update every 6 weeks, and 给未来写封信 every 3 weeks. Most recently, Time Caps was updated on September 2, 2026 and 给未来写封信 on August 31, 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.*