O vs Bühler ProPlant
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
O
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Who hasn't sometimes wished for assistance when it comes to define the mounting dimensions for O-Rings or even find the right O-Ring? The Hutchinson O-Ring app offers precious tools: • Assembly aid, depending on the installation type (in a bore, on a piston, cover fitting with internal or external pressure) • Compounds compatibility with various fluids • Intelligent O-Ring measuring tool with the smartphone's camera function • Dimensions list for standard parts You can choose a reference number from thousands of available O-Rings and then precisely define the groove dimensions to ensure perfect sealing. On the contrary, after choosing the installation type and the groove dimensions, the app will recommend a list of compatible O-Ring dimensions. A smart measuring tool has been developed to measure your O-Rings dimensions. This can for instance be used in MRO for easy replacement. Take a coin to set the standard and watch your smartphone turn into a digital measure tool for precision seals! If chemistry classes are bad memories for you, the compound compatibility tool will help you to define the appropriate compound family, depending on the fluid used in your application. Bonus : get the PDF calculation results per email ! In order to confirm your choice, we recommend to validate with tests
Bühler ProPlant
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Bühler ProPlant is the Bühler Group‘s platform for the management of the maintenance of physical assets of an organization. Maintaining your Bühler and 3rd party equipment with prepared checklists and according your installed base becomes way easier with Bühler ProPlant Mobile. With Bühler ProPlant Mobile you have your preventive maintenance jobs always in the palm of your hand. Create and document corrective maintenance tasks while standing in front of an asset and keep track of cleaning, lubricating and maintenance. If you are interested in Bühler ProPlant, please contact your local sales representative.
Screenshots
Verdict
The clearest difference is iOS requirement: O at 12.0 against Bühler ProPlant'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.
O ships an update every 6 weeks, Bühler ProPlant every 2 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.
| Parameter | O | Bühler ProPlant |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 40 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | HUTCHINSON | Bühler Group |
In-app purchases
O
No in-app purchases
Bühler ProPlant
No in-app purchases









