# RADXFLY vs HS Sirius

The clearest difference is rating: HS Sirius at 3.7 against RADXFLY's 2.4. HS Sirius also leads on review sentiment (71% vs 40%). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

HS Sirius holds the better App Store score, 3.7 against 2.4. Both are backed by a comparable volume of ratings — 29 and 11 respectively. Written reviews point the same way: 40% of RADXFLY's written reviews are positive against 71% of HS Sirius's.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | RADXFLY | HS Sirius |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (29 ratings)](https://appshunter.io/ios/app/radxfly/id6477275582/reviews) | **[3.7 (11 ratings)](https://appshunter.io/ios/app/hs-sirius/id6478848481/reviews)** |
| Number of ratings | **29** | 11 |
| Positive reviews | 40.0% of reviews | **71.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | Free |
| Size | 111 MB | 146 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [军年 陈](https://appshunter.io/developer/1309410176) | [HOLY STONE TECHNOLOGY Co.,Ltd.](https://appshunter.io/developer/1471499018) |

## What reviewers say

### RADXFLY

[App page](https://appshunter.io/ios/app/radxfly/id6477275582)

Control your flying toy and experience the thrill of flight with real-time camera transmission to your phone. Capture stunning aerial photos and videos with intuitive controls.

**Highlights:** Real-time camera feed, Flying toy control, Aerial photography, Video recording, Intuitive controls

**In-app purchases:** none


### HS Sirius

[App page](https://appshunter.io/ios/app/hs-sirius/id6478848481)

Control your drone for aerial photography with this app. It offers features like smart takeoff/landing, trajectory flight, and HD live video transmission to help you capture stunning shots.

**Highlights:** Drone control via USB, Smart takeoff and landing, Precise trajectory flight, HD real-time video transmission, Aerial photography tools

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RADXFLY free?

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

### Is HS Sirius free?

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

### Which has better reviews, RADXFLY or HS Sirius?

HS Sirius is rated higher. RADXFLY averages 2.4 out of 5 from 29 ratings, while HS Sirius averages 3.7 from 11 ratings.

### Do RADXFLY or HS Sirius have ads?

Neither RADXFLY nor HS Sirius shows ads.

### Which is updated more often, RADXFLY or HS Sirius?

RADXFLY ships an update every 3 weeks, and HS Sirius every 3 weeks. Most recently, RADXFLY was updated on October 24, 2026 and HS Sirius on October 20, 2026.

---

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