# Span Calc vs ADHNC

The clearest difference is iOS requirement: Span Calc at 14.2 against ADHNC's 18.0.1. On price, update cadence, ads and in-app purchases 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, ADHNC every 3 weeks. The most recent releases landed on August 13, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Span Calc | ADHNC |
| --- | --- | --- |
| 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 3 weeks |
| Monetization | Free | — |
| Size | 168 MB | 4 MB |
| Requires iOS | **14.2** | 18.0.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [American Wood Council](https://appshunter.io/developer/380481346) | [Ruben Mendoza](https://appshunter.io/developer/1851373356) |

## 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


### ADHNC

[App page](https://appshunter.io/ios/app/adhnc/id6755020928)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Span Calc free?

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

### Is ADHNC free?

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

### Do Span Calc or ADHNC have ads?

Neither Span Calc nor ADHNC shows ads.

### Which is updated more often, Span Calc or ADHNC?

Span Calc ships an update every 10 days, and ADHNC every 3 weeks. Most recently, Span Calc was updated on August 13, 2026 and ADHNC on September 16, 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.*