ViDiLabs Calc vs Box Fill 2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
Box Fill 2
This utility app helps electricians and contractors perform precise electrical box fill calculations according to the latest codes. It also includes a comprehensive construction calculator for dimensional math, area, volume, and right-angle solutions.
- Electrical box fill calculations
- Construction calculator
- Dimensional math (feet-inches-fractions, metric)
- Area and volume calculations
- Right-angle solutions
- Shareable calculation reports
- iCloud sync across devices
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Box Fill 2: Electrical & Construction Calculator Stop guessing and start calculating with confidence. Box Fill 2 is the ultimate pro-grade utility for electricians, contractors, and engineers. Designed to streamline your workflow from the office to the job site, it combines a precision electrical box fill calculator with a full-featured construction calculator in one powerful, intuitive interface. EXPERT ELECTRICAL CALCULATIONS Stay compliant and safe with box fill calculations based on the latest standards, including the 2024 Canadian Electrical Code (CEC) and the 2023 National Electrical Code (NEC). Complete Fill Schedules: Create and save an unlimited list of calculations for entire projects. Advanced Device Logic: Automatically handles standard devices and "bulky" equipment (like smart dimmers or GFCIs) using the specific depth-based volume math required by the CEC. Detailed Conductor Tracking: Easily account for insulated conductors, bare grounds (with the NEC "4-ground" rule), internal clamps, and wire nuts. Custom Box Support: Use standard trade sizes or enter custom dimensions for specialized enclosures. Share & Export: Print directly from the app or share professional calculation reports via email or messaging to inspectors and team members. FULL CONSTRUCTION CALCULATOR No more switching between apps. Box Fill 2 includes a robust construction math engine designed for the trades. Dimensional Math: Work directly in feet-inches-fractions or metric units with seamless conversions. Area & Volume: Quickly solve for square footage and cubic volume for materials like concrete, drywall, and paint. Right-Angle Solutions: Instantly calculate rafters, slopes, and square-ups for precise layouts. History & Memory: Access previous calculations and save frequently used values to save time on repetitive tasks. MODERN & PROFESSIONAL FEATURES Universal Compatibility: Buy once and use on your iPhone, iPad, and Mac. iCloud Sync: Your project data stays up-to-date across all your devices automatically. Dark Mode Support: Optimized for high visibility in low-light job site conditions. Clean Interface: Ad-free, professional UI designed for speed and clarity under pressure. Put your pencil down and upgrade your toolkit. Download Box Fill 2 today.
Screenshots
Verdict
The clearest difference is price: Box Fill 2 at $3.99 against ViDiLabs Calc's $18.99. Box Fill 2 also leads on rating (3.3 vs 3.0) and update cadence (every 5 weeks vs every 4 months). ViDiLabs Calc's advantage is iOS requirement (12.0 vs 26.0). On ads, in-app purchases, monetization model 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
ViDiLabs Calc costs $18.99 and Box Fill 2 $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Box Fill 2 holds the better App Store score, 3.3 against 3.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.
ViDiLabs Calc ships an update every 4 months, Box Fill 2 every 5 weeks. The most recent releases landed on October 2, 2026 and October 22, 2026 respectively.
| Parameter | ViDiLabs Calc | Box Fill 2 |
|---|---|---|
| Price | $18.99 | $3.99 — better |
| Rating | 3.0 (1 ratings) | 3.3 (3 ratings) — better |
| Positive reviews | — | 33.3% of reviews |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 4 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 12.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 9 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | ViDi Labs Pty Ltd | Snappy Appz Inc. |
Customer experience
ViDiLabs Calc
Box Fill 2
In-app purchases
ViDiLabs Calc
No in-app purchases
Box Fill 2
No in-app purchases
Questions
Is ViDiLabs Calc free?
Is Box Fill 2 free?
Which has better reviews, ViDiLabs Calc or Box Fill 2?
Do ViDiLabs Calc or Box Fill 2 have ads?
Which is updated more often, ViDiLabs Calc or Box Fill 2?
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