# Reef Pilot vs SOS Group Alert

The clearest difference is in-app purchases: Reef Pilot at none against SOS Group Alert's 1. Reef Pilot also leads on update cadence (daily vs every 2 days) and iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. SOS Group Alert sells 1 in-app purchase, starting at $2.99 per month. Reef Pilot asks for nothing beyond the download.

Reef Pilot ships an update daily, SOS Group Alert every 2 days. The most recent releases landed on October 25, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Reef Pilot | SOS Group Alert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.5 (4 ratings)](https://appshunter.io/ios/app/reef-pilot/id6752355792/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 days |
| Monetization | **Free** | Freemium |
| Size | 23 MB | 19 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ATI Aquaristik GmbH](https://appshunter.io/developer/1648857000) | [Volodymyr Kalashnikov](https://appshunter.io/developer/1821421883) |

## What reviewers say

### Reef Pilot

[App page](https://appshunter.io/ios/app/reef-pilot/id6752355792)

Control your modern saltwater aquarium lighting directly from your smartphone. Adjust intensity, color channels, and schedules for optimal coral and fish conditions.

**Highlights:** Bluetooth connection, Control StratonX aquarium light, Adjust lighting intensity, Manage color channels, Set time schedules, Intuitive smartphone control

**In-app purchases:** none


### SOS Group Alert

[App page](https://appshunter.io/ios/app/sos-group-alert/id6752491378)

Instantly notify trusted contacts of danger and share your live location in real time. Alerts can also be sent to a connected Telegram group for widespread notification. Works without registration, creating private safety groups for family, friends, or teams.

**Highlights:** Instant SOS alerts, Live location sharing, Telegram group integration, Private and secure groups, No registration required, Real-time location updates

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO – Monthly | $2.99 | per month |


## Frequently asked questions

### Is Reef Pilot free?

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

### Is SOS Group Alert free?

SOS Group Alert is free to download, with in-app purchases available.

### Do Reef Pilot or SOS Group Alert have ads?

Neither Reef Pilot nor SOS Group Alert shows ads.

### Which is updated more often, Reef Pilot or SOS Group Alert?

Reef Pilot ships an update daily, and SOS Group Alert every 2 days. Most recently, Reef Pilot was updated on October 25, 2026 and SOS Group Alert on October 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*