Comparison

YearViewer vs Carpentry Formulator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

YearViewer

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
Read full description

This app shows an overview calendar for any year. It shows the months, the days of the week, and (optionally) the week numbers. When you start the app it shows the current year, but the "time machine" button allows you to select any year in the past or future. Features: - Use pinch gestures and double-tap to zoom - The names of the months and days follow the "international" settings of your device - The "time machine" button lets you jump to any year - Weeknumbers (as defined by the ISO 8601 standard) can be shown or hidden - Choose the first day of the week: Sunday, Monday, or any other day - The current day is shown highlighted - The layout of the calendar adjusts itself to the orientation of the device (portrait / landscape) - Choose between different week layouts

About

Carpentry Formulator

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
Read full description

CARPENTRY FORMULATOR contains over 150 formulas that are useful for carpenters and builders. This app calculates loads on walls and loads on headers.The app calculates space between balusters, wood needed for railings It calculates Hardwood Flooring, calculations on Board Feet and Lumber conversions. It calculates the number of Joists, Sheet Rock, Concrete and Asphalt needed. The program has special sections on Roofing and Stairs. The CARPENTRY FORMULATOR has various formulas to calculate area and volumes of differing shapes. The program also includes dozens of conversions; everything from square feet to square inches and square inches to feet of water. Every result in CARPENTRY FORMULATOR shared. In the coming months there will be updates to CARPENTRY FORMULATOR that will include additional formulas. If there are formulas you would like that are not yet included, just e-mail us and we will try to include it in our next update. LOAD ON WALLS *Load on One Story Building Truss Roof *Load on One Story Building with Attic Stick Built *Load on Two Story Building with Attic Stick Roof *Total Load on Beam *Weight Header Can Carry LUMBER CALCULATION *Cost of Hardwood Flooring *Calculating Board Feet *Lumber Conversions- Board and Linear Feet MATERIALS NEEDED *Number of Joist Required *Number of Studs Required *Sheet Rock Coverage *Asphalt Needed *Cubic Yard of Concrete Needed *Coverage from Concrete ROOFING *Shed roof *Gable roof *Hip roof on square building *Gable Roof Sheathing *Shed Roof Sheeting *Hip Roof Sheeting STAIRS *Number of risers *Unit risers *Unit run *Total run Area Formulas Include: SQUARES *Area *Perimeter *Length of the diagonal RECTANGLES *Area *Perimeter *Length of base *Height *Length of diagonal PYRAMIDS *Pyramid area *Pyramid v *Volume prism SPHERES *Area of surface *Sde of cube *Volume of sphere Cylinder: *Cylinder area *Cylinder length *Volume *Capacity *Area of Cylinder Base *Length of Cylinder CIRCLES *Circumference *Radius *Diameter of Circle *Area of circle *Arc length *Degrees of arcs *Radius of arc CONES *Lateral surface area *Total surface area Ellipse:Area Hexagon:Area Parallelogram Area 200 Conversion formulas

Screenshots

YearViewer3 screens
Carpentry Formulator4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
YearViewer versus Carpentry Formulator: the parameters behind the verdict, then further details
ParameterYearViewerCarpentry Formulator
PriceFreeFree
Rating5.0 (2 ratings) — better3.8 (4 ratings)
Positive reviews66.7% of reviews — better25.0% of reviews
Number of ratings24 — better
Update frequencyEvery 5 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad
Requires iOS8.0 — better18.6
Further details — not scored
Size1 MB23 MB
Age rating4+4+
DeveloperGerard PutterHistorycentral.com

Customer experience

YearViewer

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive66.7%
Neutral16.7%
Negative16.7%

Carpentry Formulator

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews8 reviews
Positive25.0%
Neutral12.5%
Negative62.5%

In-app purchases

None

YearViewer

No in-app purchases

1 purchases

Carpentry Formulator

One-time1
  • Professional Features$2.99

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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