# ViDiLabs Calc vs Span Installer

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.

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.

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.

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.

## The numbers

| Metric | ViDiLabs Calc | Span Installer |
| --- | --- | --- |
| Price | $18.99 | **Free** |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/vidilabs-calc/id1054879397/reviews) | **[3.7 (13 ratings)](https://appshunter.io/ios/app/span-installer/id1477128965/reviews)** |
| Number of ratings | 1 | **13** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Paid | **Free** |
| Size | 9 MB | 104 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ViDi Labs Pty Ltd](https://appshunter.io/developer/1054879396) | [Span.io, Inc](https://appshunter.io/developer/1477128844) |

## What reviewers say

### ViDiLabs Calc

[App page](https://appshunter.io/ios/app/vidilabs-calc/id1054879397)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Span Installer

[App page](https://appshunter.io/ios/app/span-installer/id1477128965)

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

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*