BlendZ vs HollyView
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BlendZ
Calculate the precise math needed for large, blended projection screens using multiple projectors. Input your desired screen dimensions, projector resolution, and number of projectors to get all the necessary information. Supports both feet and meters for your convenience.
- Calculate blended projection screen math
- Input screen dimensions
- Input projector resolution
- Specify number of projectors
- Supports feet and meters
- Generate PDF information sheets
- Draws grids with grayscale steps
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Creativity frequently begins with a brilliant thought, rapidly followed by the frantic scribblings of pencil on paper, often accompanied by thumping's on a calculator. This is where BlendZ began. I wrote BlendZ to save me time working-out and re-calculating the math for large, widescreen, overlapping (blending) projectors, to make up screens larger than a single projector's image. If you need to work out the math for a wide screen projection surface using multiple projectors BlendZ is for you. To begin all you need to know is the desired width and height of the projection surface, the native chip resolution of the projectors (or output resolution of the source device) you are planning to use, and the number of projectors you think you need. Then, BlendZ will give you all the information you need. BlendZ works in both Feet and Metres, just choose your preferred flavour of measurement and off you go. Originally this application was written for the Mac and PC as a tool for the Project Managers of Creative Technology (www.ctinternational.com) and now I have released a mobile version for the iOS. Like the desktop version this will draw out the Grids,full with 8 or 16 step Grey-scale (horizontally or vertically) for ease of line up and if needed send out an information sheet as a PDF. Currently BlendZ only works out the stuff for a single row or column of projectors, at some point in the near future I plan to expand it to calculate projection arrays.
HollyView
This app facilitates real-time wireless video transmission for monitoring and analysis. It allows users to doodle on images, record and share videos, and manage device firmware and diagnostics.
- Real-time monitoring
- Image analysis
- Photo doodling
- Video recording
- Firmware updates
- Device diagnostics
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HollyView is a wireless video transmission app by Shenzhen Hollyland Technology, enabling real-time monitoring, image analysis, photo doodling and sharing, video recording and sharing, firmware updates, and device diagnostics.
Screenshots
Verdict
The clearest difference is review sentiment: BlendZ at 75% against HollyView's 15%. BlendZ also leads on rating (3.7 vs 2.4) and iOS requirement (9.0 vs 13.0). HollyView's advantage is price (Free vs $0.99) and ratings volume (74 vs 3). On 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
HollyView is free to download; BlendZ costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
BlendZ holds the better App Store score, 3.7 against 2.4. That said, the two scores are not equally well evidenced: HollyView has 74 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 75% of BlendZ's written reviews are positive against 15% of HollyView's.
BlendZ ships an update every 4 months, HollyView every 2 months. The most recent releases landed on October 29, 2026 and November 3, 2026 respectively.
| Parameter | BlendZ | HollyView |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 3.7 (3 ratings) — better | 2.4 (74 ratings) |
| Positive reviews | 75.0% of reviews — better | 14.7% of reviews |
| Number of ratings | 3 | 74 — better |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 5 MB | 163 MB |
| Age rating | 4+ | 4+ |
| Developer | Darren Alexander | 深圳市昊一源科技有限公司 |
Customer experience
BlendZ
HollyView
Bugs and requests
BlendZ
Not enough reviews yet to summarise bugs or requests.
HollyView
Reported bugs
40 issues- App not recognizing phone/iPad connection
- No feed when manually connecting
- App only works on older devices
- Black screen on iPad/Mac
- App won't connect after update
Show 35 moreShow fewer
- Firmware update fails
- Constant glitching and freezing
- WiFi issues
- Record button placement issue on iPhone SE
- New interface is clunky
- Cannot import LUTs
- App requires precise location
- No stream on iPhone 14
- M1 MBP not supported
- Stream address abnormal error
- Invisible text in stream setup
- App goes back to connect page
- Black screen after connecting
- Prompted to join HLD_null network
- Showing 'check input' error
- Random inbuilt LUT bug
- Screen goes black when applying installed LUTs
- App crashes and reboots iPad
- App quits randomly and reboots iPad
- Struggles with distance outdoors
- Prompts in Chinese characters
- Black bar over video stream
- App not working on iPhone 11 Pro Max
- App only shows signal strength, blank screen
- No internet connection error in WiFi option
- Check input source error on iPhone
- Resolution is 480p not 1080p
- App crashes constantly
- WiFi disconnects and app crashes
- Scanning QR code leads to system settings
- Manual code entry doesn't work
- Fix LTE WiFi issue
- App cannot connect when location/cellular disabled
- LUTs have strange purple coloring
- Laggy on iPad
Requested features
7 requests- Make auto brightness optional
- Hide iOS application bar
- True display out support
- Add remember serial number feature
- Allow deleting preset LUTs
Show 2 moreShow fewer
- De-squeeze option
- Add advanced functions like LUTS or contrast
In-app purchases
BlendZ
No in-app purchases
HollyView
No in-app purchases
Questions
Is BlendZ free?
Is HollyView free?
Which has better reviews, BlendZ or HollyView?
Do BlendZ or HollyView have ads?
Which is updated more often, BlendZ or HollyView?
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