RedX Stairs vs StudPlan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RedX Stairs
This app simplifies complex stair calculations and designs with advanced 3D visualization. It offers a comprehensive suite of calculators for various stair types, supporting multiple measurement units and providing detailed, to-scale plans for professionals and DIYers.
- Advanced 3D stair visualization
- Comprehensive stair calculators
- To-scale stair plans with precise measurements
- Support for CM, MM, Feet, and Inches
- Project saving and sharing options
- Specialized tools for spiral and winder stairs
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Discover the next level of stair construction with the RedX Stair App, now fully enhanced with stunning 3D capabilities. This app is your essential companion for efficient and precise stair measurement and visualization. Featuring a wide selection of calculators for every type of stair configuration including Straight Stairs , L-Shaped Stairs, U-Shaped Stairs, Spiral Stairs, Winder Stairs, Corner Deck Stairs and more, it effortlessly simplifies the most complex stair calculations. Whether you're working in CM, MM, Feet, or Inches, this app ensures versatile and accurate measurements for professionals and DIY enthusiasts alike. Key Upgrades and Features: Advanced 3D visualization for all stair types, offering a dynamic and immersive design experience Comprehensive suite of calculators for Straight, L, U, Spiral Stairs, Winders, and more, accommodating any project requirement Interactive, to-scale stair plans with precise measurements, enhancing design accuracy and efficiency Multifaceted measurement support in CM, MM, Feet, and Inches for global applicability Efficient project management options: Print, Share, Save to Photos, or Store designs in-app for future reference Detailed plans and measurements for common stair builds, including stringer details for unparalleled clarity Specialized tools for designing Spiral, Curved, and Winder stairs with customizable specifications Exclusive Features for Enhanced Design: Enter key details like Total Rise, Stringer, and Tread information to instantly generate detailed, to-scale stair plans Customize your stair designs with adjustable Stair Angles, Step Numbers, and more for perfect fit and function For Spiral and Curved Stairs, specify Total Rise, Rotation, and Radius to receive plans with Inner and Outer Stringer measurements Unique Winder Stairs feature for detailed planning of each tread, ensuring precise execution of complex designs Specialized calculators for Hip Stringers and Stairs with Landings, offering comprehensive design solutions The RedX Stair App is the ultimate tool for transforming your stair design process with the power of 3D visualization. Download now to experience unparalleled precision and creativity in stair design. Stay ahead with continuous updates and new features, elevating your design capabilities to new heights. ---------- Terms Of Use https://www.redxapps.com/terms-of-service In-app purchases available for premium features. Subscription options include a monthly or yearly Stairs App Pro Subscription, with payment charged to your iTunes account and easy management of auto-renewal settings in the App Store. Pricing details and subscription terms available within the app.
StudPlan
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Plan wall framing in seconds — wood or steel, straight or rake/gable — with full material takeoffs, client quotes, and cut lists ready for the job site. Built for iOS 17. No accounts. No analytics. No advertising. No tracking SDKs. 100% offline — every calculation runs on your phone, so it works in a basement or anywhere else with no signal. WHAT YOU CAN DO • FRAME A SINGLE WALL Enter length, height, and on-center spacing (12", 16", 19.2", or 24"). Choose 2x4 or 2x6 lumber. Get instant stud counts, plate lengths, board feet, wood volume, and wall area, with a live layout and your choice of end-stud configuration. Tap any field to type over it instantly. • STEEL FRAMING Cold-formed steel studs for non-load-bearing partitions — track and stud linear-foot takeoffs, gauge selection, and self-drilling screw counts. • RAKE, GABLE & ASYMMETRIC GABLE WALLS Enter a pitch (3:12 to 12:12, or custom) or low/high heights. Gable walls support a center or off-centre ridge with independent left/right slopes. Every stud comes out with its exact length and bevel angle, ready to cut. • DOORS, WINDOWS & CORNERS Drop in any opening with its rough opening size, and position it from the left edge, right edge, or center — one tap. King studs, jack studs, cripples, sills, and headers are calculated for you, including built-up trimmer posts for wide openings per IRC R602.7.5. • CUT LIST & MATERIAL TAKEOFF A full board-by-board takeoff — studs, plates, headers, blocking — per wall and across the project. Sheathing and drywall sheet counts, insulation coverage, and fastener estimates included. A buy list shows how many sticks of each market length to order, exportable as CSV. • 4×8 SHEET LAYOUT See exactly where OSB or plywood panels land on your wall. Edges on a stud are green; unsupported joins are flagged red before you start nailing. • FIXTURE BACKING Point-placed blocking for grab bars, TV mounts, and cabinets, each with its own board footage and diagram placement. • PRESETS One tap loads standard pre-cut heights (92-5/8", 104-5/8", 116-5/8"). Or save your own wall configuration once and reuse or update it on any wall. • MARK-OUT GUIDE A copy-ready list of measured positions along the plate — for marking studs on-site without re-counting. • MULTI-WALL PROJECTS Save framing jobs across multiple walls with intersection tracking (shared studs auto-deducted at T-junctions). Duplicate a wall or start the next one pre-filled with the last. Undo an accidental delete. Track totals: studs, plates, board feet, wood volume, wall area, and cost. • CLIENT QUOTE PDF & EXPORT A client-ready estimate with labor hours, material subtotal, markup, and tax — without exposing your cut list. Or export a full PDF with diagrams, cut lists, mark-out positions, and material summary. • IMPERIAL AND METRIC Feet-inches-fractions down to 1/8", or millimeters. Switch anytime without losing your project. • YOUR OWN iCLOUD SYNC Projects sync across your iPhone and iPad through your own iCloud account — optional, can be turned off in Settings. Never touches our servers; there are none. • IRC REFERENCE BUILT IN IRC R602.7 header sizing, bearing and point loads, nominal vs. actual lumber sizes, steel gauge-to-mil, common rough opening sizes, corner stud configurations, and roof pitch to angle conversions. PRIVACY FIRST StudPlan runs on-device. No login. No analytics. No advertising. No tracking SDKs. No camera, photo library, location, or microphone access requested. Turn on iCloud sync and your projects sync only through your own iCloud account — never through our servers, because we don't have any. 3-day free trial, then $1.99/week. Monthly, yearly, and lifetime options available. Cancel anytime. Terms of Use: https://taxlite.net/stud_plan/terms.html Privacy Policy: https://taxlite.net/stud_plan/privacy.html
Screenshots
Verdict
The clearest difference is device support: RedX Stairs at 3 against StudPlan's 1. RedX Stairs also leads on iOS requirement (15.6 vs 17.0). 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. RedX Stairs sells 7 in-app purchases, starting at $6.99 per month and StudPlan sells 4 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.
RedX Stairs ships an update every 2 weeks, StudPlan every 3 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.
| Parameter | RedX Stairs | StudPlan |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (422 ratings) — better | — |
| Positive reviews | 25.9% of reviews | — |
| Number of ratings | 422 — better | — |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 174 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | RedX Technology Inc | ZHENGQIAO JIANG |
Bugs and requests
RedX Stairs
Reported bugs
3 issues- App gets stuck on opening screen
- App repeatedly redirects to subscription page
- Lost work after canceling subscription
Requested features
3 requests- Support for spiral staircases
- Include stairs app in bundle
- More features in paid version
StudPlan
Not enough reviews yet to summarise bugs or requests.
In-app purchases
RedX Stairs
- RedX Stairs Monthly$6.991 Month
- RedX Apps Pro++$9.991 Month
- RedX Stairs Premium7 Days trial$59.991 Year
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- RedX Apps Pro++$59.991 Year
- RedX Stairs Pro7 Days trial$69.991 Year
- RedX Apps Bundle7 Days trial$99.991 Year
- RedX Apps Bundle1 Year trial2 variants$179.991 Year
StudPlan
- Weekly3 Days trial$1.997 Days
- Monthly$4.991 Month
- Yearly3 Days trial$29.991 Year
- Lifetime$79.99
Questions
Is RedX Stairs free?
Is StudPlan free?
Do RedX Stairs or StudPlan have ads?
Which is updated more often, RedX Stairs or StudPlan?
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