Comparison

ViDiLabs Calc vs Span Installer

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

Head to head
About

ViDiLabs Calc

This app calculates necessary camera lens focal lengths and object distances for optimal pixel density, aiding in compliance with surveillance standards. It also estimates storage capacity for video recordings and helps analyze moving object blur for clearer image capture.

Highlights
  • Calculate required focal length and object distance
  • Determine required storage capacity
  • Pixel density calculation for identification and recognition
  • Database of commercially available sensors
  • Manual entry for custom variables
  • Moving object blur analysis
  • Pre-set pixel densities for common projects
Features
Read full description

The ViDi Labs calculator helps you calculate the required focal length lens on a camera, or suggested distance to an object, in order to achieve the required pixel density (read clarity), compliant with various standards. It also helps you calculate the required storage capacity for a given number of recording days or minutes (in case you need to export an incident on a USB flash drive). It consists of two sub-applications, one called Visual and the other Digital. Many surveillance standards or tenders would specify cameras in particular locations in a project so that facial identification or recognition is achieved at the particular area. To comply with such tenders is not easy because pixel density calculation depends on the sensor size, the focal length of the lens and the distance to the object, all interdependent. The ViDi Labs calculator has all the right formulas to do it for you.  It contains a database of all commercially available sensors, from the smallest up to the large format cameras (currently 102MP).  All you need to know is the sensor your camera uses. With the latest version 2.0 of this app we have introduced manual entry of any of the variables (by double-tapping a window), including distances or focal length that are not in the scrolling picker data-base, or perhaps you use an "unusual" or new sensor size. In the Pixel Density area of the pre-set buttons on the right hand-side we introduced the correct pixel densities for Face Identification (FI), Recognition (FR) and Inspection, as per the Australian Standard corrigendum document for the IEC 62676-4: 2015. In this version, the FI is now 350pix/m, instead of 250pix/m, and the FR is 175pix/m instead of 125pix/m. Similarly, for the Face Inspection we now have the value of 1400pix/m, instead of 1000pix/m.  These corrected numbers will help you design a better system. You can still enter, however, any value you desire by scrolling the window or manually entering by double-tapping. In addition to the "facial" pixel densities pre-set buttons, we have also introduced pixel densities pre-sets for common projects such as Licence Plates Recognition (LPR), money and playing cards. Please note that these values are from our own testing and experience, and they do not exist in any standard as such. The CCTV industry is not the only field of use for the ViDiLabs calculator, because this app can be used by anybody with a digital camera, be that in photography, cinematography, or in machine vision, as it can help find the best lens, distance and camera settings for the clearest image. In the same Visual section, the ViDi Labs calculator also calculates moving object blur as they are recorded with various exposures. Such calculations are first in the industry and could prove extremely useful in systems used for automatic face recognition, vehicles automatic licence plate reading, reading the roulette wheels winning numbers and all other moving objects that need to be seen more clearly. In the latest v.2.0 we introduced yet another new and unique calculations which considers the angle of the object motion relative to the optical axis. Under the Digital sub-application, the ViDi Labs calculator also calculates the recording storage capacity for a given number of cameras, chosen length of recording, percentage of VMD and compression. Users can also enter the type of storage required (RAID type) and the calculator will advise how many hard disks are required to achieve the chosen number of storage days. For the first time in the surveillance industry, it can also indicate the visual quality of the chosen compression by showing a simulation of the ViDi Labs test chart for the chosen compression (H.264 or JPG). Last, but not least, in the v.2.0 update, we have introduced calculating of the storage needed of a short event, typically lasting a few minutes, which needs to be exported to a USB flash drive for for further analysis by third party or Police for example.

About

Span Installer

This app streamlines the installation and servicing of new and existing SPAN panels. It offers enhanced navigation, an improved breaker labeling process, and integrated troubleshooting support. Users can also confirm communications with battery systems and program setpoints for energy management.

Highlights
  • Faster new SPAN Panel commissioning
  • Simplified user navigation
  • Improved breaker labeling
  • Integrated troubleshooting and support
  • Confirm hardware communications
  • Program setpoints with SPAN PowerUp
Read full description

The new and improved SPAN Installer App supports the seamless installation of new SPAN panels. The SPAN Installer App also allows for seamless service calls of existing SPAN Panel installations. - Set up and commission a new SPAN Panel faster than ever before - Enhanced and simplified user navigation and design - New and Improved breaker labelling process making it even easier to install SPAN - Seamless troubleshooting and support integrated into the app - Confirm communications with battery systems and other hardware like SPAN Drive - Program setpoints to help customers avoid service upgrades with SPAN PowerUpTM Shift to smarter, cleaner energy with SPAN and ensure quality installations for your customers. **You must be a SPAN Authorized Installer to login to the SPAN Installer App.**

Screenshots

ViDiLabs Calc4 screens
Span Installer4 screens

Verdict

The call

The clearest difference is price: Span Installer at Free against ViDiLabs Calc's $18.99. Span Installer also leads on rating (3.7 vs 3.0) and update cadence (fortnightly vs every 4 months). ViDiLabs Calc's advantage is iOS requirement (12.0 vs 17.6). 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

Span Installer is free to download; ViDiLabs Calc costs $18.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Span Installer holds the better App Store score, 3.7 against 3.0. That said, the two scores are not equally well evidenced: Span Installer has 13 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

ViDiLabs Calc ships an update every 4 months, Span Installer fortnightly. The most recent releases landed on October 2, 2026 and October 15, 2026 respectively.

Scorecard6 real differences · 4 level
ViDiLabs Calc versus Span Installer: the parameters behind the verdict, then further details
ParameterViDiLabs CalcSpan Installer
Price$18.99Free — better
Rating3.0 (1 ratings)3.7 (13 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings113 — better
Update frequencyEvery 4 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPod — betteriPhone
Requires iOS12.0 — better17.6
Further details — not scored
Size9 MB104 MB
Age rating4+4+
DeveloperViDi Labs Pty LtdSpan.io, Inc

Customer experience

ViDiLabs Calc

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%

Span Installer

All ratings13 ratings
Positive69.2%
Neutral0.0%
Negative30.8%
Written reviews4 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

ViDiLabs Calc

No in-app purchases

None

Span Installer

No in-app purchases

Questions

Is ViDiLabs Calc free?
ViDiLabs Calc costs $18.99, with no in-app purchases.
Is Span Installer free?
Span Installer is free to download, with no in-app purchases.
Which has better reviews, ViDiLabs Calc or Span Installer?
Span Installer is rated higher. ViDiLabs Calc averages 3.0 out of 5 from 1 ratings, while Span Installer averages 3.7 from 13 ratings.
Do ViDiLabs Calc or Span Installer have ads?
Neither ViDiLabs Calc nor Span Installer shows ads.
Which is updated more often, ViDiLabs Calc or Span Installer?
ViDiLabs Calc ships an update every 4 months, and Span Installer fortnightly. Most recently, ViDiLabs Calc was updated on October 2, 2026 and Span Installer on October 15, 2026.

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