# Echo vs 真探·酒店助手

The clearest difference is review sentiment: Echo at 100% against 真探·酒店助手's 50%. Echo also leads on in-app purchases (none vs 2). 真探·酒店助手's advantage is price (Free vs $0.99) and update cadence (weekly vs every 3 months). On ads, device support and iOS requirement there is nothing between them.

真探·酒店助手 is free to download; Echo costs $0.99 up front. 真探·酒店助手 sells 2 in-app purchases, starting at $3.99 per 7 days. Echo asks for nothing beyond the download.

Echo ships an update every 3 months, 真探·酒店助手 weekly. The most recent releases landed on October 19, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Echo | 真探·酒店助手 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.0 (4 ratings)](https://appshunter.io/ios/app/id6770867700/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Paid | **Freemium** |
| Size | 2 MB | 11 MB |
| Requires iOS | 18.6 | **17** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [鹏 杨](https://appshunter.io/developer/1884186063) | [好喜 孙](https://appshunter.io/developer/1739822417) |

## 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


### 真探·酒店助手

[App page](https://appshunter.io/ios/app/id6770867700)

This app helps travelers detect hidden devices, analyze room noise, and scan for network anomalies in unfamiliar hotel rooms. It also allows users to map and review hotels, creating a personal travel accommodation record for future reference.

**Highlights:** Hotel mapping and review, Travel record keeping, Red dot scanning, Decibel detection, Night vision mode, Port scanning

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly VIP | $3.99 | per 7 days |
| forever vip | $39.99 | one-time |


## Frequently asked questions

### Is Echo free?

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

### Is 真探·酒店助手 free?

真探·酒店助手 is free to download, with in-app purchases available.

### Do Echo or 真探·酒店助手 have ads?

Neither Echo nor 真探·酒店助手 shows ads.

### Which is updated more often, Echo or 真探·酒店助手?

Echo ships an update every 3 months, and 真探·酒店助手 weekly. Most recently, Echo was updated on October 19, 2026 and 真探·酒店助手 on October 6, 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.*