# YearViewer vs Carpentry Formulator

The clearest difference is rating: YearViewer at 5.0 against Carpentry Formulator's 3.8. YearViewer also leads on review sentiment (67% vs 25%) and in-app purchases (none vs 1). Carpentry Formulator's advantage is update cadence (every 2 months vs every 5 months). On price, ratings volume, ads and monetization model there is nothing between them.

Both are free to download. Carpentry Formulator sells 1 one-off in-app purchase. YearViewer asks for nothing beyond the download.

YearViewer holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews point the same way: 67% of YearViewer's written reviews are positive against 25% of Carpentry Formulator's.

YearViewer ships an update every 5 months, Carpentry Formulator every 2 months. The most recent releases landed on October 14, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | YearViewer | Carpentry Formulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/yearviewer/id304045410/reviews)** | [3.8 (4 ratings)](https://appshunter.io/ios/app/carpentry-formulator/id305583131/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | **66.7% of reviews** | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 1 MB | 23 MB |
| Requires iOS | **8.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gerard Putter](https://appshunter.io/developer/284862847) | [Historycentral.com](https://appshunter.io/developer/1744330560) |

## What reviewers say

### YearViewer

[App page](https://appshunter.io/ios/app/yearviewer/id304045410)

View a calendar overview for any year, past or future. Customize your view with optional week numbers, adjustable start days, and different week layouts. Pinch to zoom and use device settings for language.

**Highlights:** Yearly calendar overview, Select any past or future year, Optional week numbers (ISO 8601), Customizable first day of the week, Pinch-to-zoom functionality, Device language integration

**Features:** macOS Compatibility

**In-app purchases:** none


### Carpentry Formulator

[App page](https://appshunter.io/ios/app/carpentry-formulator/id305583131)

This app provides over 150 formulas and dozens of conversions for carpenters and builders. It calculates loads on walls and headers, material quantities for projects, and dimensions for roofing and stairs. It also includes area and volume calculations for various shapes.

**Highlights:** Load calculations for walls and headers, Material quantity estimation (joists, studs, concrete), Roofing and stair dimension calculations, Area and volume formulas for geometric shapes, Dozens of unit conversion tools, Shareable calculation results

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Professional Features | $2.99 | one-time |


## Frequently asked questions

### Is YearViewer free?

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

### Is Carpentry Formulator free?

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

### Which has better reviews, YearViewer or Carpentry Formulator?

YearViewer is rated higher. YearViewer averages 5.0 out of 5 from 2 ratings, while Carpentry Formulator averages 3.8 from 4 ratings.

### Do YearViewer or Carpentry Formulator have ads?

Neither YearViewer nor Carpentry Formulator shows ads.

### Which is updated more often, YearViewer or Carpentry Formulator?

YearViewer ships an update every 5 months, and Carpentry Formulator every 2 months. Most recently, YearViewer was updated on October 14, 2026 and Carpentry Formulator on October 30, 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.*