# RedX Stairs vs StudPlan

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.

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.

## The numbers

| Metric | RedX Stairs | StudPlan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (422 ratings)](https://appshunter.io/ios/app/redx-stairs-3d-calculator/id1589688170/reviews)** | — |
| Number of ratings | **422** | — |
| Positive reviews | 25.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 174 MB | 4 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [RedX Technology Inc](https://appshunter.io/developer/835492291) | [ZHENGQIAO JIANG](https://appshunter.io/developer/1892168889) |

## What reviewers say

### RedX Stairs

[App page](https://appshunter.io/ios/app/redx-stairs-3d-calculator/id1589688170)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RedX Stairs Monthly | $6.99 | per month |
| RedX Apps Pro++ | $9.99 | per month |
| RedX Stairs Premium | $59.99 | per year |
| RedX Apps Pro++ | $59.99 | per year |
| RedX Stairs Pro | $69.99 | per year |
| RedX Apps Bundle | $99.99 | per year |
| RedX Apps Bundle | $179.99 | per year |

**What reviewers like**

- 👍 Great for pros and new users
- 💡 Detailed project PDFs
- 💡 Excellent for riser stairs
- 💡 Handles complex stair designs
- 💡 Useful for limited space

**What reviewers complain about**

- 👎 App gets stuck on opening screen
- 👎 Scam to charge $60
- 👎 Subscription expired, can't view/edit
- 👎 Expensive and missing options
- 👎 Paid for a year, lost work after canceling

**Reported bugs**

- App gets stuck on opening screen
- App repeatedly redirects to subscription page
- Lost work after canceling subscription

**Requested features**

- Support for spiral staircases
- Include stairs app in bundle
- More features in paid version


### StudPlan

[App page](https://appshunter.io/ios/app/studplan-wall-framing-layout/id6769339554)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Monthly | $4.99 | per month |
| Yearly | $29.99 | per year |
| Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is RedX Stairs free?

RedX Stairs is free to download, with in-app purchases available.

### Is StudPlan free?

StudPlan is free to download, with in-app purchases available.

### Do RedX Stairs or StudPlan have ads?

Neither RedX Stairs nor StudPlan shows ads.

### Which is updated more often, RedX Stairs or StudPlan?

RedX Stairs ships an update every 2 weeks, and StudPlan every 3 weeks. Most recently, RedX Stairs was updated on October 27, 2026 and StudPlan on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*