HK vs Master Flash® Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HK
Control a four-axis aircraft remotely using your phone. View real-time video from the aircraft's camera and capture photos or videos directly to your device. Features like optical flow ensure stable flight.
- Remote aircraft control via Wi-Fi
- Real-time video streaming
- Photo and video recording
- Optical flow for stable flight
- Gesture control for photos
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This is a APP for the four axis aircraft control via Wifi protocol. 1. Remote control the four axis aircraft by phone 2. Display the real-time video which taken by the camera on the aircraft, video data transmitted via 2.4G Wifi Protocol. 3. Take the photo and video record on phone 4. It has strong playability by equipping with game actions function. 5. It is equipped with optical flow system that the flying is more stable 6 Support V gesture to take photo to phone.
Master Flash® Calculator
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The Master Flash® roof pitch calculator is a handy tool that will help you quickly determine the pipe size, type of roof, compound, roof pitch, and style of Master Flash® you need for your pipe flashing job.
Screenshots
Verdict
The clearest difference is update cadence: Master Flash® Calculator at weekly against HK's monthly. HK's advantage is iOS requirement (8.0 vs 12.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
HK ships an update monthly, Master Flash® Calculator weekly. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.
| Parameter | HK | Master Flash® Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (6 ratings) — better | — |
| Number of ratings | 6 — better | — |
| Update frequency | Monthly | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 8.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 134 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Joyhonest Technology Co., Ltd | Aztec International S.A. |
In-app purchases
HK
No in-app purchases
Master Flash® Calculator
No in-app purchases
