# Span Calc vs Temperonic Control Systems

The clearest difference is update cadence: Span Calc at every 10 days against Temperonic Control Systems's every 6 weeks. Temperonic Control Systems's advantage is iOS requirement (12.2 vs 14.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Span Calc ships an update every 10 days, Temperonic Control Systems every 6 weeks. The most recent releases landed on August 13, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Span Calc | Temperonic Control Systems |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.9 (15 ratings)](https://appshunter.io/ios/app/span-calc/id380481343/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 29.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 6 weeks |
| Monetization | Free | — |
| Size | 168 MB | 89 MB |
| Requires iOS | 14.2 | **12.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [American Wood Council](https://appshunter.io/developer/380481346) | [Temperonic](https://appshunter.io/developer/1573420621) |

## What reviewers say

### Span Calc

[App page](https://appshunter.io/ios/app/span-calc/id380481343)

Calculate maximum horizontal spans for wood joists and rafters using various lumber species and grades. Compares multiple options for common loading conditions based on NDS® standards.

**Highlights:** Calculates joist and rafter spans, Supports all softwood and hardwood lumber, Uses 2021 NDS® for Wood Construction, Compares multiple species and grades, Handles common loading conditions

**Features:** macOS Compatibility

**In-app purchases:** none


### Temperonic Control Systems

[App page](https://appshunter.io/ios/app/temperonic-control-systems/id1573420619)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Span Calc free?

Span Calc is free to download, with no in-app purchases.

### Is Temperonic Control Systems free?

Temperonic Control Systems is free to download, with no in-app purchases.

### Do Span Calc or Temperonic Control Systems have ads?

Neither Span Calc nor Temperonic Control Systems shows ads.

### Which is updated more often, Span Calc or Temperonic Control Systems?

Span Calc ships an update every 10 days, and Temperonic Control Systems every 6 weeks. Most recently, Span Calc was updated on August 13, 2026 and Temperonic Control Systems on September 17, 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.*