Roughness vs CloudLabs Linear Motion
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Roughness
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When it comes to the surface of workpieces, a large number of surface parameters are required in design and manufacture. Before installation or delivery, the workpieces are also verified in quality management. The roughness app from ZEISS provides information on the most common surface parameters with related formulas and graphs.
CloudLabs Linear Motion
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In this simulator it is possible to study uniform rectilinear motion. For the development of this practice, the student has an air rail with a mobile, an air pump to eliminate friction, sensors to detect movement and a screen that shows the instantaneous measurements of the movement. It is necessary to configure the air rail to be able to travel a certain distance in a certain time.
Screenshots
Verdict
The clearest difference is iOS requirement: CloudLabs Linear Motion at 9.0 against Roughness's 15.0. 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. Neither carries in-app purchases, so what you see is what you pay.
Roughness ships an update every 14 months, CloudLabs Linear Motion every 20 months. The most recent releases landed on November 10, 2026 and November 7, 2026 respectively.
| Parameter | Roughness | CloudLabs Linear Motion |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 14 months — better | Every 20 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 26 MB | 69 MB |
| Age rating | 4+ | 17+ |
| Developer | Carl Zeiss AG | Jiovany Orozco |
In-app purchases
Roughness
No in-app purchases
CloudLabs Linear Motion
No in-app purchases
Questions
Is Roughness free?
Is CloudLabs Linear Motion free?
Do Roughness or CloudLabs Linear Motion have ads?
Which is updated more often, Roughness or CloudLabs Linear Motion?
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