# Echo vs BirthdayBook

The clearest difference is price: BirthdayBook at Free against Echo's $3.99. BirthdayBook also leads on update cadence (every 10 days vs every 6 weeks) and iOS requirement (16.0 vs 18.6). Echo's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

BirthdayBook is free to download; Echo costs $3.99 up front. BirthdayBook sells 1 one-off in-app purchase. Echo asks for nothing beyond the download.

Echo ships an update every 6 weeks, BirthdayBook every 10 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Echo | BirthdayBook |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 10 days** |
| Monetization | Paid | — |
| Size | 3 MB | 8 MB |
| Requires iOS | 18.6 | **16.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [鹏 杨](https://appshunter.io/developer/1884186063) | [Takumi Sekiguchi](https://appshunter.io/developer/1896725776) |

## 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


### BirthdayBook

[App page](https://appshunter.io/ios/app/birthdaybook-countdown/id6790126101)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $1.99 | one-time |


## Frequently asked questions

### Is Echo free?

Echo costs $3.99, with no in-app purchases.

### Is BirthdayBook free?

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

### Do Echo or BirthdayBook have ads?

BirthdayBook shows ads; Echo does not.

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

Echo ships an update every 6 weeks, and BirthdayBook every 10 days. Most recently, Echo was updated on October 31, 2026 and BirthdayBook on October 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.*