# 海水驿站 vs Reef Guard

The clearest difference is ads: Reef Guard at none against 海水驿站's shown. Reef Guard also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17). 海水驿站's advantage is update cadence (weekly vs fortnightly). On price and in-app purchases there is nothing between them.

Both are free to download. 海水驿站 sells 4 in-app purchases, starting at $28.99 per 6 months and Reef Guard sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

海水驿站 ships an update weekly, Reef Guard fortnightly. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 海水驿站 | Reef Guard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/id922497742/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 52.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 97 MB | 40 MB |
| Requires iOS | 17 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [兆辉 马](https://appshunter.io/developer/667445063) | [宇 郭](https://appshunter.io/developer/1851353253) |

## What reviewers say

### 海水驿站

[App page](https://appshunter.io/ios/app/id922497742)

This app helps saltwater aquarium enthusiasts manage their tanks with smart water quality tracking, expert guides, and a community forum. It offers detailed creature databases and task management to simplify aquarium care.

**Highlights:** Smart water quality management, Expert aquarium setup guides, Original saltwater feeding strategies, Saltwater creature database, Community forum for enthusiasts, Task management for aquariums

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 半年会员 | $28.99 | per 6 months |
| 1 year premium member | $29.99 | per year |
| 1 month premium member | $29.99 | per month |
| 打赏站长一杯咖啡 | $4.99 | one-time |


### Reef Guard

[App page](https://appshunter.io/ios/app/reef-guard/id6755100588)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reef Guard Pro Monthly | $1.99 | per month |
| Reef Guard Pro Yearly | $19.99 | per year |


## Frequently asked questions

### Is 海水驿站 free?

海水驿站 is free to download, with in-app purchases available.

### Is Reef Guard free?

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

### Do 海水驿站 or Reef Guard have ads?

海水驿站 shows ads; Reef Guard does not.

### Which is updated more often, 海水驿站 or Reef Guard?

海水驿站 ships an update weekly, and Reef Guard fortnightly. Most recently, 海水驿站 was updated on November 1, 2026 and Reef Guard on October 30, 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.*