# Echo vs 思佳

The clearest difference is price: 思佳 at Free against Echo's $0.99. Echo's advantage is in-app purchases (none vs 1). On update cadence, ads, device support and iOS requirement there is nothing between them.

思佳 is free to download; Echo costs $0.99 up front. 思佳 sells 1 one-off in-app purchase. Echo asks for nothing beyond the download.

Echo ships an update every 6 weeks, 思佳 every 5 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | Echo | 思佳 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 weeks** |
| Monetization | Paid | — |
| Size | 3 MB | 8 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [鹏 杨](https://appshunter.io/developer/1884186063) | [Changsha Zhihui Yuchuang Technology Co., Ltd.](https://appshunter.io/developer/1515092418) |

## What reviewers say

### Echo

[App page](https://appshunter.io/ios/app/echo-anniversary/id6760383873)

This app helps you track important dates like anniversaries and manage daily notes. It offers local reminders, diary entries with moods, and a "On This Day" feature to revisit past memories. The minimalist design keeps everything private and on your device.

**Highlights:** Anniversary and countdown tracking, Local reminders, Diary entries with moods, On This Day flashbacks, Privacy-first local storage, PDF export of diary

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

**In-app purchases:** none


### 思佳

[App page](https://appshunter.io/ios/app/id6786537685)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 思佳高级版 | $4.99 | one-time |


## Frequently asked questions

### Is Echo free?

Echo costs $0.99, with no in-app purchases.

### Is 思佳 free?

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

### Do Echo or 思佳 have ads?

Neither Echo nor 思佳 shows ads.

### Which is updated more often, Echo or 思佳?

Echo ships an update every 6 weeks, and 思佳 every 5 weeks. Most recently, Echo was updated on October 24, 2026 and 思佳 on October 24, 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.*