# Timberlog vs NHLA Rules

The clearest difference is in-app purchases: NHLA Rules at none against Timberlog's 1. NHLA Rules also leads on ads (none vs shown) and iOS requirement (12.2 vs 15.0). Timberlog's advantage is update cadence (weekly vs every 3 months). On price and device support there is nothing between them.

Both are free to download. Timberlog sells 1 one-off in-app purchase. NHLA Rules asks for nothing beyond the download.

Timberlog ships an update weekly, NHLA Rules every 3 months. The most recent releases landed on October 12, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Timberlog | NHLA Rules |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (36 ratings)](https://appshunter.io/ios/app/timberlog-log-scale-calc/id1667253703/reviews)** | — |
| Number of ratings | **36** | — |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 89 MB | 111 MB |
| Requires iOS | 15.0 | **12.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bojan Zalar](https://appshunter.io/developer/1667253705) | [NHLA](https://appshunter.io/developer/1704028919) |

## What reviewers say

### Timberlog

[App page](https://appshunter.io/ios/app/timberlog-log-scale-calc/id1667253703)

Calculate timber volume in various units like cubic meters, cubic feet, or board feet. This tool supports multiple log scaling methods and local timber volume tables for different tree species. Easily create and share reports in Excel format.

**Highlights:** Multiple volume units (m³, ft³, board feet), Supports numerous log scaling methods, Local timber volume tables for various species, Create and share Excel reports, User-friendly data entry, Optimized for visibility in bright light

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Professional Version | $39.99 | one-time |


### NHLA Rules

[App page](https://appshunter.io/ios/app/nhla-rules/id6463164128)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Timberlog free?

Timberlog is free to download, with in-app purchases available.

### Is NHLA Rules free?

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

### Do Timberlog or NHLA Rules have ads?

Timberlog shows ads; NHLA Rules does not.

### Which is updated more often, Timberlog or NHLA Rules?

Timberlog ships an update weekly, and NHLA Rules every 3 months. Most recently, Timberlog was updated on October 12, 2026 and NHLA Rules on October 9, 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.*