TDCA vs Stair Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TDCA
Easily estimate the materials needed for decks, terraces, or docks. Select timber types and deck shapes to get a material quantity estimate. Includes inspirational photos and an FAQ section.
- Material quantity estimation
- Timber type selection
- Deck shape selection
- Email material lists
- Inspirational construction photos
- FAQ section
Read full descriptionHide full description
With the new Timber Decking and Cladding Association app TDCA, you can easily estimate the kind and quantity of materials you need to purchase to construct a center deck, terrace or docking facility. You can find the correct type of timber for your construction, select a deck shape and get an estimate of the quantity of deckboard, joists, oil and fixings you require, and e-mail this list of materials to others. The app also contains photos of constructions to inspire you, and an FAQ (Frequently Asked Questions) section. If you've never before constructed a deck, this app can help you get started, and for professionals, here's an app that gives you a quick estimate on-site. This app is free and since it's an iPhone app, it can be used on an iPad as well.
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
Screenshots
Verdict
The clearest difference is rating: Stair Calculator at 4.1 against TDCA's 2.0. Stair Calculator also leads on ratings volume (738 vs 1) and review sentiment (21% vs 0%). TDCA's advantage is in-app purchases (none vs 2) and iOS requirement (7.0 vs 15.0). On price, update cadence, ads and device support 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. TDCA asks for nothing beyond the download.
Stair Calculator holds the better App Store score, 4.1 against 2.0. That said, the two scores are not equally well evidenced: Stair Calculator has 738 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of TDCA's written reviews are positive against 21% of Stair Calculator's.
TDCA ships an update every 2 months, Stair Calculator every 3 months. The most recent releases landed on September 22, 2026 and September 18, 2026 respectively.
| Parameter | TDCA | Stair Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (1 ratings) | 4.1 (738 ratings) — better |
| Positive reviews | 0.0% of reviews | 21.4% of reviews — better |
| Number of ratings | 1 | 738 — better |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 7.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 7 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | AVIA | Phan Nhat Đang |
Customer experience
TDCA
Stair Calculator
Bugs and requests
TDCA
Not enough reviews yet to summarise bugs or 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
In-app purchases
TDCA
No in-app purchases
Stair Calculator
- Annual Premium Package7 Days trial$9.991 Year
- Unlock all features$5.99
Questions
Is TDCA free?
Is Stair Calculator free?
Which has better reviews, TDCA or Stair Calculator?
Do TDCA or Stair Calculator have ads?
Which is updated more often, TDCA or Stair Calculator?
Other comparisons















