Stair Calculator vs Carpentry Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Stair Calculator
This app calculates essential parameters for stair construction, offering flexibility in input and providing multiple step set options. It supports various units and allows results to be easily copied.
- Calculate stair construction parameters
- Flexible input for Run or Total Run
- Determine largest and smallest step sets
- Support for various units
- Copy results to clipboard
Read full descriptionHide full description
Stair Calculator helps you calculate and compare staircase dimensions. FEATURES • Calculate using Run, Total Run, or Stair Angle • Enter a specific number of Runs or explore all calculated options • Support Metric and Imperial units • View detailed measurements and stair diagrams • Export results as a PDF or image • Copy results to the clipboard IMPORTANT Results are generated based on user-provided values and general calculation models. The app is intended for reference and educational purposes only. Please verify all measurements, local building requirements, and safety standards before actual construction. SUBSCRIPTION This subscription package offers unlimited access to all app features throughout the subscription period. • Payment will be charged to your Apple Account at confirmation of purchase. • The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. • Your Apple Account will be charged for renewal within 24 hours before the end of the current period, and the renewal cost will be identified. • Subscriptions may be managed and auto-renewal may be turned off in your Apple Account Settings after purchase. • Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable. PRIVACY POLICY https://13520178.github.io/StairCalc/policy.html TERMS OF USE https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ CONTACT If you have any questions or suggestions, please contact us. Email: phannhatd@gmail.com
Carpentry Calculator
This app simplifies complex calculations for carpenters, builders, and DIY enthusiasts. It handles tasks like roofing, stairs, and decking, offering both metric and imperial units. Visual aids and detailed measurements enhance accuracy and efficiency on any project.
- Roofing calculations
- Stair and decking measurements
- Concrete slab and post hole calculations
- Raked wall and balustrade design
- Trigonometry functions
- Metric and imperial unit support
- Light and dark mode options
Read full descriptionHide full description
The Carpentry Calculator is a must-have tool for all carpenters, builders, handymen and DIYers. This handy app makes light work of any tricky calculations, using either metric or imperial units. It is simple and easy to use, but very powerful. All screens have help available and the app can be switched easily between light and dark modes. The app will complete difficult calculations for roofing, stairs, raked walls, concrete post holes and slabs, concrete stairs, cladding, decking, balustrades (level and raked), trigonometry and that's just the tip of the iceberg. What separates us from the rest is the attention to detail. Most functions will even draw your work and give you a list of running measurements so you know exactly what you are marking out. The Carpentry Calculator will improve efficiency and productivity on the worksite leading to a faster, more accurate and therefore more profitable job. No more scratching your head or pulling out the old textbooks to try remember how to calculate something. Download and see for yourself!
Screenshots
Verdict
The clearest difference is review sentiment: Carpentry Calculator at 71% against Stair Calculator's 21%. Carpentry Calculator also leads on rating (5.0 vs 4.1) and monetization model (free vs free with in-app purchases). Stair Calculator's advantage is ratings volume (740 vs 1). On price, update cadence, ads and in-app purchases 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
Both are free to download. Stair Calculator sells 2 in-app purchases, starting at $9.99 per year and Carpentry Calculator sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Carpentry Calculator holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Stair Calculator has 740 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 21% of Stair Calculator's written reviews are positive against 71% of Carpentry Calculator's.
Stair Calculator ships an update every 3 months, Carpentry Calculator every 2 months. Both last shipped on November 3, 2026.
| Parameter | Stair Calculator | Carpentry Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (740 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 21.4% of reviews | 71.4% of reviews — better |
| Number of ratings | 740 — better | 1 |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Phan Nhat Đang | Matthew Spencer |
Customer experience
Stair Calculator
Carpentry Calculator
Bugs and requests
Stair Calculator
Reported bugs
2 issues- Subscription numbers don't add up
- Doesn't provide promised features after purchase
Requested features
3 requests- Option to uninstall app
- Ability to calculate run based on rise and landing space
- Provide more detailed diagrams and visuals
Carpentry Calculator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Stair Calculator
- Annual Premium Package7 Days trial$9.991 Year
- Unlock all features$5.99
Carpentry Calculator
- Discounted upgrade$3.49
- Upgrade to paid version$4.99
Questions
Is Stair Calculator free?
Is Carpentry Calculator free?
Which has better reviews, Stair Calculator or Carpentry Calculator?
Do Stair Calculator or Carpentry Calculator have ads?
Which is updated more often, Stair Calculator or Carpentry Calculator?
Other comparisons















