# RM XSMART vs Celsius® hollow section design

RM XSMART and Celsius® hollow section design are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 7 months. The most recent releases landed on October 8, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | RM XSMART | Celsius® hollow section design |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | Every 7 months |
| Monetization | — | Free |
| Size | 80 MB | 11 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rubble Master HMH GmbH](https://appshunter.io/developer/1238762857) | [Tata Steel IJmuiden B.V.](https://appshunter.io/developer/1346513780) |

## What reviewers say

### RM XSMART

[App page](https://appshunter.io/ios/app/rm-xsmart/id1238762858)

**In-app purchases:** none


### Celsius® hollow section design

[App page](https://appshunter.io/ios/app/celsius-hollow-section-design/id1484496183)

This app assists structural engineers in selecting the optimal hollow section size based on design load conditions and buckling length. It calculates and lists suitable sections from a comprehensive range, providing key information like efficiency factor and mass per meter. Users can filter results by size, utilization, embodied CO₂, or weight, and share selections via email or messaging.

**Highlights:** Calculate section size based on axial load and buckling length, Select sections for members in bending, List sections with efficiency factor and mass per meter, Filter results by size, utilization, CO₂, or weight, Classify sections by UK market availability, Share selected sections via email or messaging

**In-app purchases:** none


## Frequently asked questions

### Is RM XSMART free?

RM XSMART is free to download, with no in-app purchases.

### Is Celsius® hollow section design free?

Celsius® hollow section design is free to download, with no in-app purchases.

### Do RM XSMART or Celsius® hollow section design have ads?

Neither RM XSMART nor Celsius® hollow section design shows ads.

### Which is updated more often, RM XSMART or Celsius® hollow section design?

RM XSMART ships an update every 7 months, and Celsius® hollow section design every 7 months. Most recently, RM XSMART was updated on October 8, 2026 and Celsius® hollow section design on October 13, 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.*