Comparison

Stair Calculator vs The Chippy Calc

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

Head to head
About

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.

Highlights
  • 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
Features
Read 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

About

The Chippy Calc

This app provides carpenters, builders, and DIYers with precise, visual construction calculations. It offers specialized tools for stairs, decks, rafters, and more, with support for both metric and imperial units. All calculations can be saved and accessed offline.

Highlights
  • Visual results with scaled diagrams
  • Metric and imperial unit support
  • Offline functionality
  • 14+ specialized construction calculators
  • Stair, deck, and rafter calculations
  • Linear cut list optimization
Features
Read full description

The Chippy Calc helps carpenters, builders, and DIYers work faster with precise, visual calculations. See measurements clearly on screen, switch seamlessly between metric and imperial, and keep your work saved for later — even when you are offline. Built by a qualified carpenter in Melbourne, the app focuses on real site workflows. Calculations are paired with scaled diagrams so you can verify inputs at a glance and reduce mistakes. Key capabilities: - Visual results alongside every calculation - Universal units with metric and imperial support - Works fully offline for on-site use - 17+ specialized calculators designed for construction tasks Popular calculators include: - Stair calculator for rise/run, step count, and stringer details - Decking calculator for boards, picture frames, overhangs, fascia, and screws - Rafter calculator for lengths, plumb/seat cuts, tails, and pitch for gable and skillion - Housed stringers for stopped or through housings with detailed set-out diagrams - Arc calculator for radius, diameter, chord, rise, arc length, and wall offsets - Slope and fall for gradients, ratios, levels, and drainage runs - Balustrade spacing for compliant gaps and end margins - Even spacing to distribute items with equal end gaps or center options - Linear cut list to optimize stock lengths and reduce waste - Right angle and oblique triangle solvers - Slab and concrete for holes, piers, slabs, and beams - Raked walls for precise stud lengths on sloped walls Who it is for: - Carpenters and tradies who need reliable, fast results - Builders, site supervisors, apprentices, and DIY homeowners Support: - Help guides are included for each calculator - Contact: support@thechippycalc.com - Privacy: https://thechippycalc.com/privacy Build smarter. Calculate faster. See your measurements clearly with The Chippy Calc. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Stair Calculator3 screens
The Chippy Calc4 screens

Verdict

The call

The clearest difference is review sentiment: The Chippy Calc at 100% against Stair Calculator's 21%. The Chippy Calc also leads on rating (4.5 vs 4.1) and update cadence (every 2 months vs every 3 months). Stair Calculator's advantage is ratings volume (740 vs 2). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Stair Calculator sells 2 in-app purchases, starting at $9.99 per year and The Chippy Calc sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

The Chippy Calc holds the better App Store score, 4.5 against 4.1. That said, the two scores are not equally well evidenced: Stair Calculator has 740 ratings behind it against 2, 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 100% of The Chippy Calc's.

UpkeepUpdate frequency

Stair Calculator ships an update every 3 months, The Chippy Calc every 2 months. Both last shipped on October 24, 2026.

Scorecard4 real differences · 6 level
Stair Calculator versus The Chippy Calc: the parameters behind the verdict, then further details
ParameterStair CalculatorThe Chippy Calc
PriceFreeFree
Rating4.1 (740 ratings)4.5 (2 ratings) — better
Positive reviews21.4% of reviews100.0% of reviews — better
Number of ratings740 — better2
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.4
Further details — not scored
Size1 MB76 MB
Age rating4+4+
DeveloperPhan Nhat ĐangVike Digital Pty Ltd

Customer experience

Stair Calculator

All ratings738 ratings
Positive77.2%
Neutral5.0%
Negative17.8%
Written reviews28 reviews
Positive21.4%
Neutral7.1%
Negative71.4%

The Chippy Calc

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

The Chippy Calc

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Stair Calculator

Subscriptions1
  • Annual Premium Package7 Days trial$9.991 Year
One-time1
  • Unlock all features$5.99
3 purchases

The Chippy Calc

Subscriptions2
  • Monthly3 Days trial$3.991 Month
  • Annually$19.991 Year
One-time1
  • Lifetime Premium Access$79.99

Questions

Is Stair Calculator free?
Stair Calculator is free to download, with in-app purchases available.
Is The Chippy Calc free?
The Chippy Calc is free to download, with in-app purchases available.
Which has better reviews, Stair Calculator or The Chippy Calc?
The Chippy Calc is rated higher. Stair Calculator averages 4.1 out of 5 from 740 ratings, while The Chippy Calc averages 4.5 from 2 ratings.
Do Stair Calculator or The Chippy Calc have ads?
Neither Stair Calculator nor The Chippy Calc shows ads.
Which is updated more often, Stair Calculator or The Chippy Calc?
Stair Calculator ships an update every 3 months, and The Chippy Calc every 2 months. Most recently, Stair Calculator was updated on October 24, 2026 and The Chippy Calc on October 24, 2026.

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