# Simalai vs Reef Guard

The clearest difference is in-app purchases: Simalai at none against Reef Guard's 2. Reef Guard's advantage is iOS requirement (13.0 vs 16). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Reef Guard sells 2 in-app purchases, starting at $1.99 per month. Simalai asks for nothing beyond the download.

Simalai ships an update every 3 weeks, Reef Guard fortnightly. The most recent releases landed on September 16, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Simalai | Reef Guard |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Free | — |
| Size | 8 MB | 40 MB |
| Requires iOS | 16 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [华 李](https://appshunter.io/developer/872554875) | [宇 郭](https://appshunter.io/developer/1851353253) |

## What reviewers say

### Simalai

[App page](https://appshunter.io/ios/app/simalai/id994853061)

This smart dosing pump system allows for precise liquid dispensing from 0.1ml to 999ml. Control dosing volume, frequency, and timing remotely via your mobile phone. Multiple units can be wirelessly combined for expanded functionality.

**Highlights:** Precise dosing from 0.1ml, Compact and small volume design, Mobile phone control for settings, Wireless combination of multiple pumps, Adjustable dosing frequency and time

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

**In-app purchases:** none


### 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 Simalai free?

Simalai is free to download, with no in-app purchases.

### Is Reef Guard free?

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

### Do Simalai or Reef Guard have ads?

Neither Simalai nor Reef Guard shows ads.

### Which is updated more often, Simalai or Reef Guard?

Simalai ships an update every 3 weeks, and Reef Guard fortnightly. Most recently, Simalai was updated on September 16, 2026 and Reef Guard on October 1, 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.*