Comparison

BlendZ vs HollyView

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

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.

Highlights
  • Real-time monitoring
  • Image analysis
  • Photo doodling
  • Video recording
  • Firmware updates
  • Device diagnostics
Features
Read full description

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

BlendZ4 screens
HollyView4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

HollyView is free to download; BlendZ costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
BlendZ versus HollyView: the parameters behind the verdict, then further details
ParameterBlendZHollyView
Price$0.99Free — better
Rating3.7 (3 ratings) — better2.4 (74 ratings)
Positive reviews75.0% of reviews — better14.7% of reviews
Number of ratings374 — better
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better13.0
Further details — not scored
Size5 MB163 MB
Age rating4+4+
DeveloperDarren Alexander深圳市昊一源科技有限公司

Customer experience

BlendZ

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

HollyView

All ratings74 ratings
Positive33.8%
Neutral8.1%
Negative58.1%
Written reviews68 reviews
Positive14.7%
Neutral19.1%
Negative66.2%

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 more
  • 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 more
  • De-squeeze option
  • Add advanced functions like LUTS or contrast

In-app purchases

None

BlendZ

No in-app purchases

None

HollyView

No in-app purchases

Questions

Is BlendZ free?
BlendZ costs $0.99, with no in-app purchases.
Is HollyView free?
HollyView is free to download, with no in-app purchases.
Which has better reviews, BlendZ or HollyView?
BlendZ is rated higher. BlendZ averages 3.7 out of 5 from 3 ratings, while HollyView averages 2.4 from 74 ratings.
Do BlendZ or HollyView have ads?
Neither BlendZ nor HollyView shows ads.
Which is updated more often, BlendZ or HollyView?
BlendZ ships an update every 4 months, and HollyView every 2 months. Most recently, BlendZ was updated on October 29, 2026 and HollyView on November 3, 2026.

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