Stair Calculator vs Flash.It
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
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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
Flash.It
Streamline your flashing orders with this mobile tool designed for roofers. Quickly draw, organize, and order your flashings efficiently to save time and reduce errors.
- Draw flashings quickly
- Organize flashing orders
- Order flashings easily
- Manage all flashing orders
- Improve order efficiency
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Draw and order custom sheet metal flashings and trims straight from your phone. Flash.It helps roofers, cladding installers, and sheet metal shops create clear flashing orders without messy sketches, back-and-forth calls, or redraws. Use Flash.It to: • Draw flashing profiles fast • Add measurements and job details • Send clean orders to the shop • Reduce mistakes, redraws, and rework • Keep metal trim and flashing orders simple Built for roofing, cladding, gutter, fascia, capping, and sheet metal work.
Screenshots
Verdict
The clearest difference is review sentiment: Flash.It at 92% against Stair Calculator's 21%. Flash.It also leads on rating (4.6 vs 4.1) and update cadence (every 3 weeks vs every 3 months). Stair Calculator's advantage is ratings volume (740 vs 8). On price, ads, in-app purchases 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
Both are free to download. Stair Calculator sells 2 in-app purchases, starting at $9.99 per year and Flash.It sells 10 in-app purchases, starting at $29.00 per month. Whichever you choose, the download price is not the number that matters.
Flash.It holds the better App Store score, 4.6 against 4.1. That said, the two scores are not equally well evidenced: Stair Calculator has 740 ratings behind it against 8, 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 92% of Flash.It's.
Stair Calculator ships an update every 3 months, Flash.It every 3 weeks. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.
| Parameter | Stair Calculator | Flash.It |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (740 ratings) | 4.6 (8 ratings) — better |
| Positive reviews | 21.4% of reviews | 92.3% of reviews — better |
| Number of ratings | 740 — better | 8 |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 120 MB |
| Age rating | 4+ | 4+ |
| Developer | Phan Nhat Đang | Structured Steel |
Customer experience
Stair Calculator
Flash.It
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
Flash.It
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
Flash.It
- Monthly Subscription$29.001 Month
- Individual Affiliate Monthly1 Month trial$29.001 Month
- Crew of 3$79.001 Month
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- Company 3 Member Affiliate1 Month trial$79.001 Month
- Crew of 5$129.001 Month
- 5 Member Affiliate Monthly1 Month trial$129.001 Month
- Individual Plan$249.001 Year
- 10 Member Affiliate1 Month trial$249.001 Month
- Crew of 3$690.001 Year
- 3 Member Affiliate Plan1 Year trial$690.001 Year
Questions
Is Stair Calculator free?
Is Flash.It free?
Which has better reviews, Stair Calculator or Flash.It?
Do Stair Calculator or Flash.It have ads?
Which is updated more often, Stair Calculator or Flash.It?
Other comparisons
